/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/loops-crafted-1/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:59:23,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:59:23,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:59:24,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:59:24,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 00:59:24,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 00:59:24,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 00:59:24,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:59:24,044 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:59:24,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:59:24,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:59:24,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:59:24,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:59:24,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:59:24,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:59:24,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:59:24,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:59:24,045 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:59:24,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:59:24,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:59:24,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:59:24,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:59:24,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:59:24,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:59:24,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:59:24,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:59:24,046 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:59:24,046 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:59:24,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:59:24,046 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:59:24,046 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:59:24,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:59:24,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:59:24,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:59:24,224 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:59:24,225 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:59:24,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-03-18 00:59:24,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/054072178/933a3642f3504172bb283e0537be26f5/FLAG838ad5225 [2022-03-18 00:59:24,571 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:59:24,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-03-18 00:59:24,575 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/054072178/933a3642f3504172bb283e0537be26f5/FLAG838ad5225 [2022-03-18 00:59:25,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/054072178/933a3642f3504172bb283e0537be26f5 [2022-03-18 00:59:25,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:59:25,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:59:25,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:59:25,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:59:25,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:59:25,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:59:25" (1/1) ... [2022-03-18 00:59:25,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26640ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:25, skipping insertion in model container [2022-03-18 00:59:25,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:59:25" (1/1) ... [2022-03-18 00:59:25,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:59:25,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:59:25,138 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c[321,334] [2022-03-18 00:59:25,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:59:25,173 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:59:25,215 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c[321,334] [2022-03-18 00:59:25,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:59:25,230 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:59:25,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:25 WrapperNode [2022-03-18 00:59:25,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:59:25,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:59:25,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:59:25,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:59:25,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:25" (1/1) ... [2022-03-18 00:59:25,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:25" (1/1) ... [2022-03-18 00:59:25,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:25" (1/1) ... [2022-03-18 00:59:25,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:25" (1/1) ... [2022-03-18 00:59:25,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:25" (1/1) ... [2022-03-18 00:59:25,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:25" (1/1) ... [2022-03-18 00:59:25,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:25" (1/1) ... [2022-03-18 00:59:25,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:59:25,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:59:25,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:59:25,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:59:25,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:25" (1/1) ... [2022-03-18 00:59:25,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:59:25,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:59:25,303 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) [2022-03-18 00:59:25,305 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 [2022-03-18 00:59:25,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:59:25,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:59:25,346 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:59:25,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:59:25,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:59:25,346 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:59:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:59:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:59:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:59:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:59:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:59:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:59:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:59:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:59:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:59:25,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:59:25,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:59:25,392 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:59:25,393 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:59:25,511 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:59:25,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:59:25,517 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 00:59:25,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:59:25 BoogieIcfgContainer [2022-03-18 00:59:25,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:59:25,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:59:25,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:59:25,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:59:25,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:59:25" (1/3) ... [2022-03-18 00:59:25,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bad98d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:59:25, skipping insertion in model container [2022-03-18 00:59:25,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:59:25" (2/3) ... [2022-03-18 00:59:25,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bad98d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:59:25, skipping insertion in model container [2022-03-18 00:59:25,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:59:25" (3/3) ... [2022-03-18 00:59:25,525 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2022-03-18 00:59:25,535 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:59:25,536 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:59:25,574 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:59:25,579 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 [2022-03-18 00:59:25,579 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:59:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 00:59:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:59:25,596 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:25,596 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:25,597 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:25,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 1 times [2022-03-18 00:59:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:25,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1484848661] [2022-03-18 00:59:25,615 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:59:25,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 2 times [2022-03-18 00:59:25,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:25,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354484497] [2022-03-18 00:59:25,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:25,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:25,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:25,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:25,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354484497] [2022-03-18 00:59:25,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354484497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:25,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:25,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:59:25,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:25,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1484848661] [2022-03-18 00:59:25,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1484848661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:25,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:25,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:59:25,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869426814] [2022-03-18 00:59:25,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:25,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 00:59:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:25,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 00:59:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:59:25,818 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:25,876 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2022-03-18 00:59:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 00:59:25,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 00:59:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:25,884 INFO L225 Difference]: With dead ends: 44 [2022-03-18 00:59:25,884 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 00:59:25,886 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:59:25,890 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:25,891 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:59:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 00:59:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-18 00:59:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-18 00:59:25,936 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-03-18 00:59:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:25,937 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-18 00:59:25,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-18 00:59:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:59:25,939 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:25,939 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:25,940 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:59:25,940 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:25,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:25,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 1 times [2022-03-18 00:59:25,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:25,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [884221372] [2022-03-18 00:59:25,945 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:59:25,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 2 times [2022-03-18 00:59:25,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:25,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267892297] [2022-03-18 00:59:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:25,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:26,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:26,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:26,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267892297] [2022-03-18 00:59:26,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267892297] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:26,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:26,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:26,029 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [884221372] [2022-03-18 00:59:26,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [884221372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:26,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:26,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:26,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846921837] [2022-03-18 00:59:26,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:26,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:59:26,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:26,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:59:26,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:59:26,031 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:26,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:26,107 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-03-18 00:59:26,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:59:26,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 00:59:26,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:26,110 INFO L225 Difference]: With dead ends: 34 [2022-03-18 00:59:26,110 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 00:59:26,110 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:59:26,113 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:26,113 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 00:59:26,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-03-18 00:59:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-18 00:59:26,125 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2022-03-18 00:59:26,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:26,126 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-18 00:59:26,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:26,126 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-18 00:59:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 00:59:26,126 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:26,127 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:26,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:59:26,127 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:26,128 INFO L85 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 1 times [2022-03-18 00:59:26,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:26,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [476598914] [2022-03-18 00:59:26,130 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:59:26,130 INFO L85 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 2 times [2022-03-18 00:59:26,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:26,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443580088] [2022-03-18 00:59:26,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:26,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:26,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:26,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:26,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443580088] [2022-03-18 00:59:26,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443580088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:26,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:26,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:26,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:26,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [476598914] [2022-03-18 00:59:26,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [476598914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:26,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:26,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:26,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5186356] [2022-03-18 00:59:26,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:26,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:59:26,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:26,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:59:26,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:59:26,208 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-03-18 00:59:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:26,259 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-03-18 00:59:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:59:26,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2022-03-18 00:59:26,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:26,262 INFO L225 Difference]: With dead ends: 39 [2022-03-18 00:59:26,262 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 00:59:26,262 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:59:26,265 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:26,266 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:59:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 00:59:26,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-03-18 00:59:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:26,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-03-18 00:59:26,277 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2022-03-18 00:59:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:26,277 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-03-18 00:59:26,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-03-18 00:59:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-03-18 00:59:26,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 00:59:26,278 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:26,278 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:26,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 00:59:26,279 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:26,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:26,279 INFO L85 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 1 times [2022-03-18 00:59:26,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:26,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1689953600] [2022-03-18 00:59:26,281 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:59:26,281 INFO L85 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 2 times [2022-03-18 00:59:26,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:26,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102445573] [2022-03-18 00:59:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:26,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:26,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:26,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:26,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102445573] [2022-03-18 00:59:26,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102445573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:26,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:26,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:26,320 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:26,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1689953600] [2022-03-18 00:59:26,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1689953600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:26,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:26,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:26,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595104876] [2022-03-18 00:59:26,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:26,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:59:26,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:26,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:59:26,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:59:26,321 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-03-18 00:59:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:26,352 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-03-18 00:59:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:59:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 [2022-03-18 00:59:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:26,352 INFO L225 Difference]: With dead ends: 39 [2022-03-18 00:59:26,353 INFO L226 Difference]: Without dead ends: 24 [2022-03-18 00:59:26,353 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:59:26,353 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:26,354 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:59:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-18 00:59:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-03-18 00:59:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-03-18 00:59:26,358 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2022-03-18 00:59:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:26,358 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-03-18 00:59:26,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-03-18 00:59:26,358 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-03-18 00:59:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 00:59:26,358 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:26,359 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:26,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 00:59:26,359 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:26,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1431986846, now seen corresponding path program 1 times [2022-03-18 00:59:26,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:26,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1431220556] [2022-03-18 00:59:26,437 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:26,438 INFO L85 PathProgramCache]: Analyzing trace with hash -278509117, now seen corresponding path program 1 times [2022-03-18 00:59:26,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:26,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856630639] [2022-03-18 00:59:26,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:26,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:26,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:26,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:26,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856630639] [2022-03-18 00:59:26,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856630639] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:26,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:26,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:59:26,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:26,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1431220556] [2022-03-18 00:59:26,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1431220556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:26,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:26,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:59:26,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417715788] [2022-03-18 00:59:26,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:26,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:59:26,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:26,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:59:26,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:59:26,676 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:26,858 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-03-18 00:59:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:59:26,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 00:59:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:26,859 INFO L225 Difference]: With dead ends: 30 [2022-03-18 00:59:26,859 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 00:59:26,859 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:59:26,860 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:26,860 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 47 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:26,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 00:59:26,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-18 00:59:26,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-18 00:59:26,866 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 14 [2022-03-18 00:59:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:26,866 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-18 00:59:26,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:59:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-18 00:59:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 00:59:26,867 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:26,867 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:26,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 00:59:26,867 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:26,867 INFO L85 PathProgramCache]: Analyzing trace with hash -413054462, now seen corresponding path program 1 times [2022-03-18 00:59:26,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:26,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [191869210] [2022-03-18 00:59:27,035 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1284716088, now seen corresponding path program 1 times [2022-03-18 00:59:27,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:27,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297340789] [2022-03-18 00:59:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:27,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:27,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:27,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:27,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297340789] [2022-03-18 00:59:27,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297340789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:27,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:27,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:27,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:27,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [191869210] [2022-03-18 00:59:27,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [191869210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:27,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:27,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:59:27,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219794851] [2022-03-18 00:59:27,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:27,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:59:27,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:27,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:59:27,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 00:59:27,129 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:27,195 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-03-18 00:59:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:59:27,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-03-18 00:59:27,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:27,196 INFO L225 Difference]: With dead ends: 53 [2022-03-18 00:59:27,196 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 00:59:27,197 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-18 00:59:27,198 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:27,198 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:59:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 00:59:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-03-18 00:59:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:27,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-18 00:59:27,210 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2022-03-18 00:59:27,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:27,210 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-18 00:59:27,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-18 00:59:27,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 00:59:27,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:27,211 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:27,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 00:59:27,212 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:27,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1032496162, now seen corresponding path program 2 times [2022-03-18 00:59:27,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:27,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1176689656] [2022-03-18 00:59:27,367 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1343821432, now seen corresponding path program 1 times [2022-03-18 00:59:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:27,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544991467] [2022-03-18 00:59:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:27,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:27,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:27,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:27,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544991467] [2022-03-18 00:59:27,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544991467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:27,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:27,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:27,481 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:27,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1176689656] [2022-03-18 00:59:27,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1176689656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:27,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:27,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:59:27,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942859446] [2022-03-18 00:59:27,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:27,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:59:27,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:27,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:59:27,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:59:27,484 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:27,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:27,551 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-03-18 00:59:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:59:27,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-03-18 00:59:27,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:27,552 INFO L225 Difference]: With dead ends: 55 [2022-03-18 00:59:27,552 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 00:59:27,553 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-18 00:59:27,553 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:27,553 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:59:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 00:59:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-03-18 00:59:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-03-18 00:59:27,559 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2022-03-18 00:59:27,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:27,560 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-03-18 00:59:27,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:27,560 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-03-18 00:59:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 00:59:27,560 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:27,561 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:27,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-18 00:59:27,561 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:27,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:27,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1400074750, now seen corresponding path program 3 times [2022-03-18 00:59:27,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:27,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1023016094] [2022-03-18 00:59:27,709 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:27,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1402926776, now seen corresponding path program 1 times [2022-03-18 00:59:27,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:27,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940111622] [2022-03-18 00:59:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:27,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:27,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:27,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:27,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940111622] [2022-03-18 00:59:27,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940111622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:27,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:27,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:27,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:27,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1023016094] [2022-03-18 00:59:27,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1023016094] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:27,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:27,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:59:27,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084468718] [2022-03-18 00:59:27,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:27,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:59:27,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:27,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:59:27,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:59:27,783 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:27,875 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-03-18 00:59:27,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:59:27,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-03-18 00:59:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:27,876 INFO L225 Difference]: With dead ends: 57 [2022-03-18 00:59:27,876 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 00:59:27,876 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:59:27,877 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:27,877 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 00:59:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-03-18 00:59:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-18 00:59:27,882 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2022-03-18 00:59:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:27,882 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-18 00:59:27,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-18 00:59:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 00:59:27,883 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:27,883 INFO L500 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:27,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 00:59:27,883 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:27,884 INFO L85 PathProgramCache]: Analyzing trace with hash 499638306, now seen corresponding path program 4 times [2022-03-18 00:59:27,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:27,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [479562654] [2022-03-18 00:59:28,018 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:28,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1462032120, now seen corresponding path program 1 times [2022-03-18 00:59:28,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:28,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599391399] [2022-03-18 00:59:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:28,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:28,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:28,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:28,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599391399] [2022-03-18 00:59:28,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599391399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:28,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:28,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:28,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:28,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [479562654] [2022-03-18 00:59:28,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [479562654] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:28,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:28,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:59:28,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694857355] [2022-03-18 00:59:28,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:28,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:59:28,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:28,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:59:28,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 00:59:28,105 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:28,221 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-03-18 00:59:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:59:28,221 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-18 00:59:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:28,222 INFO L225 Difference]: With dead ends: 59 [2022-03-18 00:59:28,222 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 00:59:28,222 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:59:28,223 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:28,223 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 00:59:28,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2022-03-18 00:59:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-18 00:59:28,229 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2022-03-18 00:59:28,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:28,229 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-18 00:59:28,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-18 00:59:28,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 00:59:28,229 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:28,229 INFO L500 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:28,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-18 00:59:28,230 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:28,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:28,230 INFO L85 PathProgramCache]: Analyzing trace with hash -738799102, now seen corresponding path program 5 times [2022-03-18 00:59:28,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:28,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [168787131] [2022-03-18 00:59:28,360 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1521137464, now seen corresponding path program 1 times [2022-03-18 00:59:28,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:28,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547531694] [2022-03-18 00:59:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:28,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:28,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:28,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:28,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547531694] [2022-03-18 00:59:28,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547531694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:28,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:28,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:28,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:28,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [168787131] [2022-03-18 00:59:28,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [168787131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:28,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:28,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:59:28,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75196586] [2022-03-18 00:59:28,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:28,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:59:28,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:28,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:59:28,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:59:28,450 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:28,566 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-03-18 00:59:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:59:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-03-18 00:59:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:28,567 INFO L225 Difference]: With dead ends: 61 [2022-03-18 00:59:28,567 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 00:59:28,568 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:59:28,568 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:28,568 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:28,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 00:59:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-03-18 00:59:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:28,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-18 00:59:28,574 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2022-03-18 00:59:28,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:28,574 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-18 00:59:28,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:28,574 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-18 00:59:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 00:59:28,575 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:28,575 INFO L500 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:28,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-18 00:59:28,575 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:28,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:28,575 INFO L85 PathProgramCache]: Analyzing trace with hash -475653086, now seen corresponding path program 6 times [2022-03-18 00:59:28,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:28,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1849871157] [2022-03-18 00:59:28,705 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:28,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1580242808, now seen corresponding path program 1 times [2022-03-18 00:59:28,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:28,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716609409] [2022-03-18 00:59:28,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:28,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:28,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:28,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:28,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716609409] [2022-03-18 00:59:28,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716609409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:28,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:28,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:28,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:28,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1849871157] [2022-03-18 00:59:28,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1849871157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:28,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:28,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:59:28,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52063264] [2022-03-18 00:59:28,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:28,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:59:28,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:28,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:59:28,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-18 00:59:28,800 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:28,960 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-03-18 00:59:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:59:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-03-18 00:59:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:28,961 INFO L225 Difference]: With dead ends: 63 [2022-03-18 00:59:28,961 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 00:59:28,962 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:59:28,962 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:28,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 00:59:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-03-18 00:59:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-18 00:59:28,969 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2022-03-18 00:59:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:28,969 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-18 00:59:28,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-18 00:59:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 00:59:28,969 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:28,969 INFO L500 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:28,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-18 00:59:28,970 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash -908061182, now seen corresponding path program 7 times [2022-03-18 00:59:28,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:28,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1003664272] [2022-03-18 00:59:29,103 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:29,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1639348152, now seen corresponding path program 1 times [2022-03-18 00:59:29,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:29,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403002073] [2022-03-18 00:59:29,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:29,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:29,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:29,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:29,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403002073] [2022-03-18 00:59:29,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403002073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:29,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:29,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:29,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:29,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1003664272] [2022-03-18 00:59:29,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1003664272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:29,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:29,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:59:29,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474260175] [2022-03-18 00:59:29,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:29,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:59:29,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:59:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:59:29,229 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:29,392 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-03-18 00:59:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 00:59:29,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-03-18 00:59:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:29,393 INFO L225 Difference]: With dead ends: 65 [2022-03-18 00:59:29,393 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 00:59:29,393 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-03-18 00:59:29,394 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:29,394 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 00:59:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2022-03-18 00:59:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-18 00:59:29,400 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2022-03-18 00:59:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:29,400 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-18 00:59:29,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-18 00:59:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 00:59:29,401 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:29,401 INFO L500 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:29,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-18 00:59:29,401 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:29,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1427810270, now seen corresponding path program 8 times [2022-03-18 00:59:29,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:29,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [736198498] [2022-03-18 00:59:29,532 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:29,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1698453496, now seen corresponding path program 1 times [2022-03-18 00:59:29,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:29,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533124209] [2022-03-18 00:59:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:29,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:29,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:29,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:29,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533124209] [2022-03-18 00:59:29,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533124209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:29,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:29,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:29,658 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:29,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [736198498] [2022-03-18 00:59:29,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [736198498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:29,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:29,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 00:59:29,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704116060] [2022-03-18 00:59:29,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:29,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 00:59:29,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:29,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 00:59:29,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:59:29,659 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:29,846 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-03-18 00:59:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:59:29,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-03-18 00:59:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:29,847 INFO L225 Difference]: With dead ends: 67 [2022-03-18 00:59:29,847 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 00:59:29,847 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:59:29,848 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:29,848 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 56 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 00:59:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2022-03-18 00:59:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-18 00:59:29,854 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 28 [2022-03-18 00:59:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:29,854 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-18 00:59:29,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-18 00:59:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 00:59:29,855 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:29,855 INFO L500 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:29,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-18 00:59:29,855 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:29,855 INFO L85 PathProgramCache]: Analyzing trace with hash -360162814, now seen corresponding path program 9 times [2022-03-18 00:59:29,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:29,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [444788619] [2022-03-18 00:59:29,979 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:29,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1757558840, now seen corresponding path program 1 times [2022-03-18 00:59:29,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:29,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232621310] [2022-03-18 00:59:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:29,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:30,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:30,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:30,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232621310] [2022-03-18 00:59:30,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232621310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:30,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:30,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:30,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:30,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [444788619] [2022-03-18 00:59:30,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [444788619] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:30,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:30,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:59:30,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398792598] [2022-03-18 00:59:30,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:30,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:59:30,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:30,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:59:30,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:59:30,114 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:30,338 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2022-03-18 00:59:30,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 00:59:30,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-03-18 00:59:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:30,339 INFO L225 Difference]: With dead ends: 69 [2022-03-18 00:59:30,339 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 00:59:30,340 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:59:30,340 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:30,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 00:59:30,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-03-18 00:59:30,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-03-18 00:59:30,347 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2022-03-18 00:59:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:30,347 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-03-18 00:59:30,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-03-18 00:59:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 00:59:30,348 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:30,348 INFO L500 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:30,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-18 00:59:30,348 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:30,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1622830046, now seen corresponding path program 10 times [2022-03-18 00:59:30,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:30,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1162412446] [2022-03-18 00:59:30,480 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1816664184, now seen corresponding path program 1 times [2022-03-18 00:59:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:30,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217329872] [2022-03-18 00:59:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:30,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:30,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:30,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:30,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217329872] [2022-03-18 00:59:30,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217329872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:30,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:30,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:30,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:30,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1162412446] [2022-03-18 00:59:30,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1162412446] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:30,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:30,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:59:30,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121232949] [2022-03-18 00:59:30,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:30,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 00:59:30,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:30,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 00:59:30,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:59:30,643 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:30,869 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2022-03-18 00:59:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:59:30,869 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-03-18 00:59:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:30,870 INFO L225 Difference]: With dead ends: 71 [2022-03-18 00:59:30,870 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 00:59:30,870 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-18 00:59:30,871 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:30,871 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:30,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 00:59:30,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2022-03-18 00:59:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-03-18 00:59:30,877 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2022-03-18 00:59:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:30,877 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-03-18 00:59:30,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:30,877 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-03-18 00:59:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 00:59:30,878 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:30,878 INFO L500 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:30,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-18 00:59:30,878 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:30,878 INFO L85 PathProgramCache]: Analyzing trace with hash -2110808574, now seen corresponding path program 11 times [2022-03-18 00:59:30,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:30,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [734301299] [2022-03-18 00:59:31,002 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:31,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1875769528, now seen corresponding path program 1 times [2022-03-18 00:59:31,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:31,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031501362] [2022-03-18 00:59:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:31,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:31,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:31,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:31,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031501362] [2022-03-18 00:59:31,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031501362] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:31,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:31,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:31,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:31,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [734301299] [2022-03-18 00:59:31,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [734301299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:31,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:31,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:59:31,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842796545] [2022-03-18 00:59:31,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:31,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:59:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:59:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:59:31,169 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:31,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:31,390 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2022-03-18 00:59:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 00:59:31,390 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-03-18 00:59:31,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:31,391 INFO L225 Difference]: With dead ends: 73 [2022-03-18 00:59:31,391 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 00:59:31,391 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-03-18 00:59:31,392 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:31,392 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 00:59:31,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-03-18 00:59:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-18 00:59:31,398 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2022-03-18 00:59:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:31,399 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-18 00:59:31,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-18 00:59:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 00:59:31,399 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:31,399 INFO L500 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:31,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-18 00:59:31,400 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:31,400 INFO L85 PathProgramCache]: Analyzing trace with hash -58273758, now seen corresponding path program 12 times [2022-03-18 00:59:31,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:31,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [856790457] [2022-03-18 00:59:31,491 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:31,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1934874872, now seen corresponding path program 1 times [2022-03-18 00:59:31,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:31,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368280977] [2022-03-18 00:59:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:31,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:31,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:31,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:31,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368280977] [2022-03-18 00:59:31,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368280977] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:31,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:31,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:31,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:31,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [856790457] [2022-03-18 00:59:31,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [856790457] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:31,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:31,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 00:59:31,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318420424] [2022-03-18 00:59:31,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:31,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 00:59:31,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:31,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 00:59:31,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:59:31,686 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:31,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:31,957 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-03-18 00:59:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:59:31,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-03-18 00:59:31,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:31,958 INFO L225 Difference]: With dead ends: 75 [2022-03-18 00:59:31,958 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 00:59:31,958 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-03-18 00:59:31,959 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:31,959 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:31,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 00:59:31,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-03-18 00:59:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-03-18 00:59:31,966 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2022-03-18 00:59:31,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:31,966 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-03-18 00:59:31,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:31,966 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-03-18 00:59:31,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 00:59:31,966 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:31,966 INFO L500 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:31,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-18 00:59:31,967 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:31,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:31,968 INFO L85 PathProgramCache]: Analyzing trace with hash -854203902, now seen corresponding path program 13 times [2022-03-18 00:59:31,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:31,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [68277662] [2022-03-18 00:59:32,092 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:32,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1993980216, now seen corresponding path program 1 times [2022-03-18 00:59:32,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:32,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378324179] [2022-03-18 00:59:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:32,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:32,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:32,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:32,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378324179] [2022-03-18 00:59:32,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378324179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:32,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:32,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:32,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [68277662] [2022-03-18 00:59:32,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [68277662] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:32,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:32,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:59:32,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75925338] [2022-03-18 00:59:32,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:32,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 00:59:32,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:32,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 00:59:32,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:59:32,310 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:32,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:32,589 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-03-18 00:59:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 00:59:32,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-03-18 00:59:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:32,590 INFO L225 Difference]: With dead ends: 77 [2022-03-18 00:59:32,590 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 00:59:32,591 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 00:59:32,591 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:32,592 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:32,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 00:59:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-03-18 00:59:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-03-18 00:59:32,599 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2022-03-18 00:59:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:32,599 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-03-18 00:59:32,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:32,599 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-03-18 00:59:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 00:59:32,599 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:32,599 INFO L500 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:32,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-18 00:59:32,600 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash 241765410, now seen corresponding path program 14 times [2022-03-18 00:59:32,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:32,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1601716626] [2022-03-18 00:59:32,725 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:32,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2053085560, now seen corresponding path program 1 times [2022-03-18 00:59:32,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:32,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479569874] [2022-03-18 00:59:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:32,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:32,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:32,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:32,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479569874] [2022-03-18 00:59:32,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479569874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:32,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:32,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:32,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:32,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1601716626] [2022-03-18 00:59:32,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1601716626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:32,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:32,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 00:59:32,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638083116] [2022-03-18 00:59:32,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:32,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 00:59:32,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:32,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 00:59:32,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:59:32,983 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:33,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:33,299 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-03-18 00:59:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 00:59:33,300 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-03-18 00:59:33,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:33,300 INFO L225 Difference]: With dead ends: 79 [2022-03-18 00:59:33,300 INFO L226 Difference]: Without dead ends: 46 [2022-03-18 00:59:33,301 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 00:59:33,301 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:33,301 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:59:33,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-18 00:59:33,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-03-18 00:59:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:33,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-03-18 00:59:33,308 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2022-03-18 00:59:33,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:33,309 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-03-18 00:59:33,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-03-18 00:59:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 00:59:33,309 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:33,309 INFO L500 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:33,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-18 00:59:33,309 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:33,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:33,310 INFO L85 PathProgramCache]: Analyzing trace with hash -142924286, now seen corresponding path program 15 times [2022-03-18 00:59:33,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:33,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1097917050] [2022-03-18 00:59:33,446 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:33,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2112190904, now seen corresponding path program 1 times [2022-03-18 00:59:33,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:33,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792331884] [2022-03-18 00:59:33,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:33,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:33,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:33,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:33,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792331884] [2022-03-18 00:59:33,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792331884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:33,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:33,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:33,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:33,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1097917050] [2022-03-18 00:59:33,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1097917050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:33,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:33,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 00:59:33,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432914203] [2022-03-18 00:59:33,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:33,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 00:59:33,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:33,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 00:59:33,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:59:33,675 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:33,998 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-03-18 00:59:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 00:59:33,999 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-03-18 00:59:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:33,999 INFO L225 Difference]: With dead ends: 81 [2022-03-18 00:59:33,999 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 00:59:34,000 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:59:34,000 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:34,001 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 96 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:59:34,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 00:59:34,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2022-03-18 00:59:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-03-18 00:59:34,028 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2022-03-18 00:59:34,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:34,028 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-03-18 00:59:34,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:34,028 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-03-18 00:59:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 00:59:34,029 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:34,029 INFO L500 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:34,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-18 00:59:34,029 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:34,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:34,029 INFO L85 PathProgramCache]: Analyzing trace with hash 816597026, now seen corresponding path program 16 times [2022-03-18 00:59:34,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:34,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [589987197] [2022-03-18 00:59:34,161 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2123671048, now seen corresponding path program 1 times [2022-03-18 00:59:34,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:34,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850120161] [2022-03-18 00:59:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:34,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:34,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:34,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:34,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850120161] [2022-03-18 00:59:34,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850120161] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:34,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:34,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:34,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:34,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [589987197] [2022-03-18 00:59:34,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [589987197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:34,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:34,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 00:59:34,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336820115] [2022-03-18 00:59:34,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:34,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 00:59:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 00:59:34,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-18 00:59:34,378 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:34,704 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-03-18 00:59:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 00:59:34,704 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-03-18 00:59:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:34,705 INFO L225 Difference]: With dead ends: 83 [2022-03-18 00:59:34,705 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 00:59:34,706 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 00:59:34,707 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:34,707 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 96 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:59:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 00:59:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-18 00:59:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-03-18 00:59:34,715 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2022-03-18 00:59:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:34,715 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-03-18 00:59:34,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-03-18 00:59:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 00:59:34,716 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:34,716 INFO L500 BasicCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:34,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-18 00:59:34,716 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:34,716 INFO L85 PathProgramCache]: Analyzing trace with hash 496986626, now seen corresponding path program 17 times [2022-03-18 00:59:34,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:34,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [598037906] [2022-03-18 00:59:34,869 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:34,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2064565704, now seen corresponding path program 1 times [2022-03-18 00:59:34,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:34,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210623100] [2022-03-18 00:59:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:34,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:34,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:34,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:34,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210623100] [2022-03-18 00:59:34,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210623100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:34,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:34,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:35,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:35,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [598037906] [2022-03-18 00:59:35,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [598037906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:35,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:35,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 00:59:35,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325577987] [2022-03-18 00:59:35,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:35,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 00:59:35,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:35,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 00:59:35,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:59:35,158 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:35,558 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2022-03-18 00:59:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 00:59:35,559 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-03-18 00:59:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:35,559 INFO L225 Difference]: With dead ends: 85 [2022-03-18 00:59:35,559 INFO L226 Difference]: Without dead ends: 49 [2022-03-18 00:59:35,560 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 00:59:35,560 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:35,560 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 76 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:59:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-18 00:59:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-03-18 00:59:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-03-18 00:59:35,568 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2022-03-18 00:59:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:35,568 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-03-18 00:59:35,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-03-18 00:59:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 00:59:35,569 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:35,569 INFO L500 BasicCegarLoop]: trace histogram [18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:35,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-18 00:59:35,569 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:35,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:35,569 INFO L85 PathProgramCache]: Analyzing trace with hash -821001182, now seen corresponding path program 18 times [2022-03-18 00:59:35,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:35,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [552064372] [2022-03-18 00:59:35,689 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2005460360, now seen corresponding path program 1 times [2022-03-18 00:59:35,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:35,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827815277] [2022-03-18 00:59:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:35,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:35,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:35,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827815277] [2022-03-18 00:59:35,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827815277] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:35,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:35,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:35,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:35,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [552064372] [2022-03-18 00:59:35,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [552064372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:35,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:35,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 00:59:35,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597979042] [2022-03-18 00:59:35,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:35,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 00:59:35,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 00:59:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:59:35,944 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:36,435 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-03-18 00:59:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 00:59:36,435 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-03-18 00:59:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:36,436 INFO L225 Difference]: With dead ends: 87 [2022-03-18 00:59:36,436 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 00:59:36,436 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 00:59:36,437 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:36,437 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 106 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:59:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 00:59:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-03-18 00:59:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-03-18 00:59:36,445 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2022-03-18 00:59:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:36,445 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-03-18 00:59:36,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-03-18 00:59:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 00:59:36,446 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:36,446 INFO L500 BasicCegarLoop]: trace histogram [19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:36,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-18 00:59:36,446 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:36,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:36,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1271049730, now seen corresponding path program 19 times [2022-03-18 00:59:36,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:36,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1755462016] [2022-03-18 00:59:36,581 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:36,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1946355016, now seen corresponding path program 1 times [2022-03-18 00:59:36,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:36,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145919464] [2022-03-18 00:59:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:36,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:36,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:36,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:36,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145919464] [2022-03-18 00:59:36,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145919464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:36,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:36,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:36,858 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:36,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1755462016] [2022-03-18 00:59:36,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1755462016] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:36,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:36,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 00:59:36,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839320635] [2022-03-18 00:59:36,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:36,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 00:59:36,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:36,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 00:59:36,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-18 00:59:36,860 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:37,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:37,388 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2022-03-18 00:59:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 00:59:37,388 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-03-18 00:59:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:37,389 INFO L225 Difference]: With dead ends: 89 [2022-03-18 00:59:37,389 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 00:59:37,389 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 00:59:37,390 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:37,390 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 116 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:59:37,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 00:59:37,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-03-18 00:59:37,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-03-18 00:59:37,399 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 39 [2022-03-18 00:59:37,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:37,399 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-03-18 00:59:37,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:37,400 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-03-18 00:59:37,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 00:59:37,400 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:37,400 INFO L500 BasicCegarLoop]: trace histogram [20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:37,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-18 00:59:37,400 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:37,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:37,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1700118562, now seen corresponding path program 20 times [2022-03-18 00:59:37,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:37,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1720963667] [2022-03-18 00:59:37,527 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1887249672, now seen corresponding path program 1 times [2022-03-18 00:59:37,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:37,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769785107] [2022-03-18 00:59:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:37,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:37,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:37,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:37,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769785107] [2022-03-18 00:59:37,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769785107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:37,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:37,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:37,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:37,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1720963667] [2022-03-18 00:59:37,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1720963667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:37,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:37,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 00:59:37,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092445340] [2022-03-18 00:59:37,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:37,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 00:59:37,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 00:59:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:59:37,848 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:38,325 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2022-03-18 00:59:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 00:59:38,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-03-18 00:59:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:38,326 INFO L225 Difference]: With dead ends: 91 [2022-03-18 00:59:38,326 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 00:59:38,326 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 00:59:38,327 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:38,327 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:59:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 00:59:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-03-18 00:59:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-03-18 00:59:38,337 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2022-03-18 00:59:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:38,337 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-03-18 00:59:38,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-03-18 00:59:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 00:59:38,337 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:38,337 INFO L500 BasicCegarLoop]: trace histogram [21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:38,337 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-18 00:59:38,337 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:38,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:38,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2116350466, now seen corresponding path program 21 times [2022-03-18 00:59:38,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:38,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [999485283] [2022-03-18 00:59:38,461 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:38,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1828144328, now seen corresponding path program 1 times [2022-03-18 00:59:38,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:38,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750967049] [2022-03-18 00:59:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:38,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:38,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:38,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:38,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750967049] [2022-03-18 00:59:38,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750967049] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:38,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:38,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:38,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:38,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [999485283] [2022-03-18 00:59:38,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [999485283] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:38,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:38,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 00:59:38,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963039526] [2022-03-18 00:59:38,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:38,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 00:59:38,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:38,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 00:59:38,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:59:38,806 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:39,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:39,408 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2022-03-18 00:59:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 00:59:39,408 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-03-18 00:59:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:39,409 INFO L225 Difference]: With dead ends: 93 [2022-03-18 00:59:39,409 INFO L226 Difference]: Without dead ends: 53 [2022-03-18 00:59:39,409 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 00:59:39,410 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:39,410 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 131 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:59:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-18 00:59:39,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-03-18 00:59:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:39,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-03-18 00:59:39,420 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2022-03-18 00:59:39,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:39,420 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-03-18 00:59:39,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:39,420 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-03-18 00:59:39,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 00:59:39,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:39,420 INFO L500 BasicCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:39,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-18 00:59:39,420 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:39,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2134637602, now seen corresponding path program 22 times [2022-03-18 00:59:39,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:39,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [127683338] [2022-03-18 00:59:39,539 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:39,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1769038984, now seen corresponding path program 1 times [2022-03-18 00:59:39,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:39,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495692518] [2022-03-18 00:59:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:39,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:39,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:39,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:39,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495692518] [2022-03-18 00:59:39,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495692518] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:39,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:39,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:39,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:39,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [127683338] [2022-03-18 00:59:39,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [127683338] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:39,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:39,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 00:59:39,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523336851] [2022-03-18 00:59:39,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:39,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 00:59:39,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:39,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 00:59:39,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-18 00:59:39,880 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:40,524 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2022-03-18 00:59:40,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 00:59:40,525 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-03-18 00:59:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:40,525 INFO L225 Difference]: With dead ends: 95 [2022-03-18 00:59:40,525 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 00:59:40,526 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 00:59:40,527 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:40,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 101 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:59:40,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 00:59:40,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-03-18 00:59:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-03-18 00:59:40,537 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 42 [2022-03-18 00:59:40,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:40,537 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-03-18 00:59:40,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:40,538 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-03-18 00:59:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 00:59:40,538 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:40,538 INFO L500 BasicCegarLoop]: trace histogram [23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:40,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-18 00:59:40,538 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:40,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:40,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1593428478, now seen corresponding path program 23 times [2022-03-18 00:59:40,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:40,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2083681575] [2022-03-18 00:59:40,665 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1709933640, now seen corresponding path program 1 times [2022-03-18 00:59:40,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:40,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296528066] [2022-03-18 00:59:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:40,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:40,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:40,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:40,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296528066] [2022-03-18 00:59:40,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296528066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:40,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:40,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:41,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:41,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2083681575] [2022-03-18 00:59:41,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2083681575] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:41,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:41,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 00:59:41,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974120724] [2022-03-18 00:59:41,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:41,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 00:59:41,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:41,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 00:59:41,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:59:41,042 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:41,624 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-03-18 00:59:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 00:59:41,625 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-03-18 00:59:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:41,625 INFO L225 Difference]: With dead ends: 97 [2022-03-18 00:59:41,625 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 00:59:41,626 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 00:59:41,627 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:41,627 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:59:41,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 00:59:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2022-03-18 00:59:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-03-18 00:59:41,638 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 43 [2022-03-18 00:59:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:41,638 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-03-18 00:59:41,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:41,638 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-03-18 00:59:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 00:59:41,638 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:41,639 INFO L500 BasicCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:41,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-18 00:59:41,639 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:41,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:41,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1199359966, now seen corresponding path program 24 times [2022-03-18 00:59:41,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:41,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1695045572] [2022-03-18 00:59:41,743 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:41,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1650828296, now seen corresponding path program 1 times [2022-03-18 00:59:41,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:41,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528536874] [2022-03-18 00:59:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:41,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:41,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:41,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528536874] [2022-03-18 00:59:41,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528536874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:41,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:41,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:42,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:42,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1695045572] [2022-03-18 00:59:42,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1695045572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:42,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:42,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 00:59:42,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084942782] [2022-03-18 00:59:42,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:42,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 00:59:42,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:42,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 00:59:42,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-03-18 00:59:42,128 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:42,570 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2022-03-18 00:59:42,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 00:59:42,571 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-03-18 00:59:42,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:42,571 INFO L225 Difference]: With dead ends: 99 [2022-03-18 00:59:42,571 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 00:59:42,572 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 00:59:42,576 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:42,577 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:59:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 00:59:42,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-03-18 00:59:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-03-18 00:59:42,606 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2022-03-18 00:59:42,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:42,606 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-03-18 00:59:42,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:42,607 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-03-18 00:59:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 00:59:42,607 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:42,607 INFO L500 BasicCegarLoop]: trace histogram [25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:42,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-18 00:59:42,607 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:42,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1868137982, now seen corresponding path program 25 times [2022-03-18 00:59:42,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:42,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1759027836] [2022-03-18 00:59:42,745 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:42,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1591722952, now seen corresponding path program 1 times [2022-03-18 00:59:42,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:42,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788239411] [2022-03-18 00:59:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:42,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:42,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:42,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:42,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788239411] [2022-03-18 00:59:42,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788239411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:42,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:42,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:43,160 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:43,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1759027836] [2022-03-18 00:59:43,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1759027836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:43,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:43,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 00:59:43,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281751173] [2022-03-18 00:59:43,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:43,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 00:59:43,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:43,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 00:59:43,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-03-18 00:59:43,162 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:43,789 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2022-03-18 00:59:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 00:59:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-03-18 00:59:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:43,790 INFO L225 Difference]: With dead ends: 101 [2022-03-18 00:59:43,790 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 00:59:43,791 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 00:59:43,792 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:43,792 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:59:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 00:59:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-03-18 00:59:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 44 states have internal predecessors, (47), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:43,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-03-18 00:59:43,807 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2022-03-18 00:59:43,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:43,808 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-03-18 00:59:43,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-03-18 00:59:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 00:59:43,808 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:43,808 INFO L500 BasicCegarLoop]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:43,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-18 00:59:43,808 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:43,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:43,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1125419998, now seen corresponding path program 26 times [2022-03-18 00:59:43,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:43,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1810193520] [2022-03-18 00:59:43,984 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:43,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1532617608, now seen corresponding path program 1 times [2022-03-18 00:59:43,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:43,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949497099] [2022-03-18 00:59:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:43,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:44,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:44,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:44,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949497099] [2022-03-18 00:59:44,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949497099] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:44,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:44,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:44,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:44,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1810193520] [2022-03-18 00:59:44,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1810193520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:44,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:44,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 00:59:44,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820816488] [2022-03-18 00:59:44,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:44,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 00:59:44,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 00:59:44,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-03-18 00:59:44,340 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:44,985 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-03-18 00:59:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 00:59:44,985 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-03-18 00:59:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:44,987 INFO L225 Difference]: With dead ends: 103 [2022-03-18 00:59:44,987 INFO L226 Difference]: Without dead ends: 58 [2022-03-18 00:59:44,988 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 00:59:44,989 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:44,989 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 136 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:59:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-18 00:59:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-03-18 00:59:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:45,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-03-18 00:59:45,002 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2022-03-18 00:59:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:45,002 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-03-18 00:59:45,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:45,003 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-03-18 00:59:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 00:59:45,003 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:45,003 INFO L500 BasicCegarLoop]: trace histogram [27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:45,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-18 00:59:45,004 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:45,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:45,004 INFO L85 PathProgramCache]: Analyzing trace with hash 424001026, now seen corresponding path program 27 times [2022-03-18 00:59:45,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:45,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [383068842] [2022-03-18 00:59:45,106 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:45,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1473512264, now seen corresponding path program 1 times [2022-03-18 00:59:45,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:45,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712405967] [2022-03-18 00:59:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:45,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:45,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:45,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:45,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712405967] [2022-03-18 00:59:45,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712405967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:45,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:45,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:45,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:45,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [383068842] [2022-03-18 00:59:45,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [383068842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:45,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:45,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 00:59:45,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040548228] [2022-03-18 00:59:45,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:45,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 00:59:45,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:45,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 00:59:45,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:59:45,492 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:46,062 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2022-03-18 00:59:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 00:59:46,063 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-03-18 00:59:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:46,063 INFO L225 Difference]: With dead ends: 105 [2022-03-18 00:59:46,063 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 00:59:46,064 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 00:59:46,064 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:46,065 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 161 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:59:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 00:59:46,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2022-03-18 00:59:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-18 00:59:46,078 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 47 [2022-03-18 00:59:46,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:46,078 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-18 00:59:46,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-18 00:59:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 00:59:46,079 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:46,079 INFO L500 BasicCegarLoop]: trace histogram [28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:46,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-18 00:59:46,079 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:46,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:46,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1211412514, now seen corresponding path program 28 times [2022-03-18 00:59:46,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:46,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [274105901] [2022-03-18 00:59:46,226 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:46,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1414406920, now seen corresponding path program 1 times [2022-03-18 00:59:46,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:46,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076420919] [2022-03-18 00:59:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:46,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:46,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:46,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:46,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076420919] [2022-03-18 00:59:46,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076420919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:46,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:46,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:46,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:46,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [274105901] [2022-03-18 00:59:46,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [274105901] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:46,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:46,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 00:59:46,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370436805] [2022-03-18 00:59:46,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:46,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 00:59:46,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:46,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 00:59:46,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 00:59:46,793 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:47,708 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2022-03-18 00:59:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 00:59:47,708 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-03-18 00:59:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:47,708 INFO L225 Difference]: With dead ends: 107 [2022-03-18 00:59:47,708 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 00:59:47,709 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 00:59:47,710 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:47,710 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 131 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:59:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 00:59:47,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-03-18 00:59:47,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:47,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-03-18 00:59:47,726 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2022-03-18 00:59:47,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:47,726 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-03-18 00:59:47,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-03-18 00:59:47,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 00:59:47,726 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:47,726 INFO L500 BasicCegarLoop]: trace histogram [29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:47,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-18 00:59:47,727 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:47,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:47,727 INFO L85 PathProgramCache]: Analyzing trace with hash -148635134, now seen corresponding path program 29 times [2022-03-18 00:59:47,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:47,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1046160065] [2022-03-18 00:59:47,847 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:47,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1355301576, now seen corresponding path program 1 times [2022-03-18 00:59:47,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:47,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088064911] [2022-03-18 00:59:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:47,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:47,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:47,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:47,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088064911] [2022-03-18 00:59:47,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088064911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:47,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:47,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:48,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1046160065] [2022-03-18 00:59:48,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1046160065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:48,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:48,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 00:59:48,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738741640] [2022-03-18 00:59:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:48,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 00:59:48,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:48,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 00:59:48,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:59:48,409 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:49,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:49,237 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2022-03-18 00:59:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 00:59:49,238 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-03-18 00:59:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:49,238 INFO L225 Difference]: With dead ends: 109 [2022-03-18 00:59:49,238 INFO L226 Difference]: Without dead ends: 61 [2022-03-18 00:59:49,239 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2022-03-18 00:59:49,239 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:49,240 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 156 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:59:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-18 00:59:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2022-03-18 00:59:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-03-18 00:59:49,254 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 49 [2022-03-18 00:59:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:49,255 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-03-18 00:59:49,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-03-18 00:59:49,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 00:59:49,255 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:49,255 INFO L500 BasicCegarLoop]: trace histogram [30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:49,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-18 00:59:49,255 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:49,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:49,256 INFO L85 PathProgramCache]: Analyzing trace with hash 639560738, now seen corresponding path program 30 times [2022-03-18 00:59:49,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:49,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [367785203] [2022-03-18 00:59:49,373 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:49,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1296196232, now seen corresponding path program 1 times [2022-03-18 00:59:49,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:49,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167127616] [2022-03-18 00:59:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:49,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:49,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:49,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:49,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167127616] [2022-03-18 00:59:49,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167127616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:49,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:49,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:49,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:49,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [367785203] [2022-03-18 00:59:49,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [367785203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:49,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:49,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 00:59:49,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663416952] [2022-03-18 00:59:49,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:49,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 00:59:49,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:49,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 00:59:49,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 00:59:49,843 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:50,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:50,467 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2022-03-18 00:59:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 00:59:50,467 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-03-18 00:59:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:50,468 INFO L225 Difference]: With dead ends: 111 [2022-03-18 00:59:50,468 INFO L226 Difference]: Without dead ends: 62 [2022-03-18 00:59:50,469 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 00:59:50,469 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:50,469 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:59:50,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-18 00:59:50,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-03-18 00:59:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:50,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-03-18 00:59:50,485 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2022-03-18 00:59:50,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:50,485 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-03-18 00:59:50,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:50,485 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-03-18 00:59:50,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 00:59:50,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:50,486 INFO L500 BasicCegarLoop]: trace histogram [31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:50,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-18 00:59:50,486 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:50,486 INFO L85 PathProgramCache]: Analyzing trace with hash -696171006, now seen corresponding path program 31 times [2022-03-18 00:59:50,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:50,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051890231] [2022-03-18 00:59:50,598 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:50,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1237090888, now seen corresponding path program 1 times [2022-03-18 00:59:50,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:50,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485121648] [2022-03-18 00:59:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:50,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:50,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:50,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:50,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485121648] [2022-03-18 00:59:50,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485121648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:50,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:50,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:50,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:50,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051890231] [2022-03-18 00:59:50,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051890231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:50,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:50,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 00:59:50,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972798783] [2022-03-18 00:59:50,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:50,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 00:59:50,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:50,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 00:59:50,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 00:59:50,980 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:51,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:51,594 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2022-03-18 00:59:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 00:59:51,595 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-03-18 00:59:51,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:51,595 INFO L225 Difference]: With dead ends: 113 [2022-03-18 00:59:51,595 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 00:59:51,596 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 00:59:51,596 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:51,600 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:59:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 00:59:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2022-03-18 00:59:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-03-18 00:59:51,616 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 51 [2022-03-18 00:59:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:51,616 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-03-18 00:59:51,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-03-18 00:59:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-18 00:59:51,617 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:51,617 INFO L500 BasicCegarLoop]: trace histogram [32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:51,617 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-18 00:59:51,617 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash 845817890, now seen corresponding path program 32 times [2022-03-18 00:59:51,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:51,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2001956856] [2022-03-18 00:59:51,731 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:51,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1177985544, now seen corresponding path program 1 times [2022-03-18 00:59:51,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:51,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758954943] [2022-03-18 00:59:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:51,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:51,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:51,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:51,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758954943] [2022-03-18 00:59:51,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758954943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:51,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:51,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:52,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2001956856] [2022-03-18 00:59:52,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2001956856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:52,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:52,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 00:59:52,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124178846] [2022-03-18 00:59:52,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:52,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 00:59:52,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:52,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 00:59:52,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:59:52,349 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:53,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:53,216 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2022-03-18 00:59:53,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 00:59:53,217 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-03-18 00:59:53,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:53,217 INFO L225 Difference]: With dead ends: 115 [2022-03-18 00:59:53,217 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 00:59:53,218 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 00:59:53,218 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:53,218 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:59:53,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 00:59:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-03-18 00:59:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-03-18 00:59:53,236 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2022-03-18 00:59:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:53,238 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-03-18 00:59:53,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-03-18 00:59:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 00:59:53,238 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:53,238 INFO L500 BasicCegarLoop]: trace histogram [33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:53,238 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-18 00:59:53,239 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:53,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1402833410, now seen corresponding path program 33 times [2022-03-18 00:59:53,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:53,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1031394374] [2022-03-18 00:59:53,376 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:53,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1118880200, now seen corresponding path program 1 times [2022-03-18 00:59:53,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:53,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808441707] [2022-03-18 00:59:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:53,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:53,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:53,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:53,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808441707] [2022-03-18 00:59:53,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808441707] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:53,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:53,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:54,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:54,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1031394374] [2022-03-18 00:59:54,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1031394374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:54,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:54,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 00:59:54,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667628652] [2022-03-18 00:59:54,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:54,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 00:59:54,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:54,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 00:59:54,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 00:59:54,049 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:54,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:54,999 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2022-03-18 00:59:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 00:59:55,000 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-03-18 00:59:55,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:55,000 INFO L225 Difference]: With dead ends: 117 [2022-03-18 00:59:55,000 INFO L226 Difference]: Without dead ends: 65 [2022-03-18 00:59:55,001 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 00:59:55,002 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:55,002 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 136 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:59:55,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-18 00:59:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2022-03-18 00:59:55,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-03-18 00:59:55,020 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2022-03-18 00:59:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:55,020 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-03-18 00:59:55,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:55,020 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-03-18 00:59:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 00:59:55,020 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:55,020 INFO L500 BasicCegarLoop]: trace histogram [34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:55,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-18 00:59:55,021 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:55,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1490445346, now seen corresponding path program 34 times [2022-03-18 00:59:55,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:55,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945983209] [2022-03-18 00:59:55,177 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:55,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1059774856, now seen corresponding path program 1 times [2022-03-18 00:59:55,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:55,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9391136] [2022-03-18 00:59:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:55,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:55,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:55,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:55,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9391136] [2022-03-18 00:59:55,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9391136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:55,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:55,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:55,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:55,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945983209] [2022-03-18 00:59:55,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945983209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:55,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:55,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 00:59:55,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047028661] [2022-03-18 00:59:55,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:55,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 00:59:55,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:55,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 00:59:55,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 00:59:55,862 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:57,119 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2022-03-18 00:59:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 00:59:57,120 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-03-18 00:59:57,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:57,120 INFO L225 Difference]: With dead ends: 119 [2022-03-18 00:59:57,120 INFO L226 Difference]: Without dead ends: 66 [2022-03-18 00:59:57,121 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 00:59:57,122 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:57,122 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 151 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:59:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-18 00:59:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-03-18 00:59:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-03-18 00:59:57,141 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2022-03-18 00:59:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:57,141 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-03-18 00:59:57,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-03-18 00:59:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 00:59:57,142 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:57,142 INFO L500 BasicCegarLoop]: trace histogram [35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:57,142 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-18 00:59:57,142 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:57,143 INFO L85 PathProgramCache]: Analyzing trace with hash -88551934, now seen corresponding path program 35 times [2022-03-18 00:59:57,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:57,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082675042] [2022-03-18 00:59:57,281 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:57,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1000669512, now seen corresponding path program 1 times [2022-03-18 00:59:57,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:57,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647688791] [2022-03-18 00:59:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:57,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:57,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:57,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:57,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647688791] [2022-03-18 00:59:57,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647688791] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:57,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:57,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:57,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:57,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082675042] [2022-03-18 00:59:57,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082675042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:57,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:57,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 00:59:57,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799837502] [2022-03-18 00:59:57,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:57,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 00:59:57,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:57,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 00:59:57,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:59:57,937 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:59:58,729 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2022-03-18 00:59:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 00:59:58,730 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-03-18 00:59:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:59:58,730 INFO L225 Difference]: With dead ends: 121 [2022-03-18 00:59:58,730 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 00:59:58,731 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2022-03-18 00:59:58,731 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:59:58,731 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:59:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 00:59:58,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2022-03-18 00:59:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 54 states have internal predecessors, (57), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:59:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-18 00:59:58,750 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 55 [2022-03-18 00:59:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:59:58,750 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-18 00:59:58,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:59:58,751 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-18 00:59:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 00:59:58,751 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:59:58,751 INFO L500 BasicCegarLoop]: trace histogram [36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:59:58,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-18 00:59:58,751 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:59:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:59:58,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1792827358, now seen corresponding path program 36 times [2022-03-18 00:59:58,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:58,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1240716774] [2022-03-18 00:59:58,871 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:59:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash -941564168, now seen corresponding path program 1 times [2022-03-18 00:59:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:59:58,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411676416] [2022-03-18 00:59:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:59:58,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:59:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:58,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:59:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:59:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:59:58,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:59:58,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411676416] [2022-03-18 00:59:58,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411676416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:58,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:58,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:59:59,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:59:59,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1240716774] [2022-03-18 00:59:59,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1240716774] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:59:59,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:59:59,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 00:59:59,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082359715] [2022-03-18 00:59:59,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:59:59,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 00:59:59,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:59:59,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 00:59:59,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 00:59:59,588 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:00,380 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2022-03-18 01:00:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 01:00:00,380 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-03-18 01:00:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:00,380 INFO L225 Difference]: With dead ends: 123 [2022-03-18 01:00:00,380 INFO L226 Difference]: Without dead ends: 68 [2022-03-18 01:00:00,381 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 01:00:00,381 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:00,382 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 01:00:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-18 01:00:00,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-03-18 01:00:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-03-18 01:00:00,403 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2022-03-18 01:00:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:00,403 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-03-18 01:00:00,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:00,403 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-03-18 01:00:00,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 01:00:00,403 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:00,403 INFO L500 BasicCegarLoop]: trace histogram [37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:00,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-18 01:00:00,403 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:00,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:00,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1209209346, now seen corresponding path program 37 times [2022-03-18 01:00:00,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:00,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1966410154] [2022-03-18 01:00:00,536 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:00,537 INFO L85 PathProgramCache]: Analyzing trace with hash -882458824, now seen corresponding path program 1 times [2022-03-18 01:00:00,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:00,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759702412] [2022-03-18 01:00:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:00,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:00,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:00,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759702412] [2022-03-18 01:00:00,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759702412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:00,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:00,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:01,275 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:01,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1966410154] [2022-03-18 01:00:01,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1966410154] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:01,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:01,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 01:00:01,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997442242] [2022-03-18 01:00:01,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:01,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 01:00:01,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 01:00:01,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 01:00:01,277 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:02,341 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2022-03-18 01:00:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 01:00:02,342 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-03-18 01:00:02,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:02,342 INFO L225 Difference]: With dead ends: 125 [2022-03-18 01:00:02,342 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 01:00:02,343 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 01:00:02,344 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:02,344 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 201 Invalid, 2235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 01:00:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 01:00:02,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2022-03-18 01:00:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-03-18 01:00:02,365 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2022-03-18 01:00:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:02,365 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-03-18 01:00:02,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-03-18 01:00:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 01:00:02,365 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:02,365 INFO L500 BasicCegarLoop]: trace histogram [38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:02,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-18 01:00:02,365 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:02,366 INFO L85 PathProgramCache]: Analyzing trace with hash -216933342, now seen corresponding path program 38 times [2022-03-18 01:00:02,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:02,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [713603972] [2022-03-18 01:00:02,478 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:02,478 INFO L85 PathProgramCache]: Analyzing trace with hash -823353480, now seen corresponding path program 1 times [2022-03-18 01:00:02,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:02,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900446665] [2022-03-18 01:00:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:02,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:02,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:02,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:02,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900446665] [2022-03-18 01:00:02,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900446665] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:02,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:02,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:03,200 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:03,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [713603972] [2022-03-18 01:00:03,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [713603972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:03,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:03,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 01:00:03,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399867825] [2022-03-18 01:00:03,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:03,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 01:00:03,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:03,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 01:00:03,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 01:00:03,202 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 42 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:04,256 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2022-03-18 01:00:04,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 01:00:04,257 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 42 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-03-18 01:00:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:04,257 INFO L225 Difference]: With dead ends: 127 [2022-03-18 01:00:04,257 INFO L226 Difference]: Without dead ends: 70 [2022-03-18 01:00:04,258 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2022-03-18 01:00:04,265 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:04,266 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 01:00:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-18 01:00:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-03-18 01:00:04,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-03-18 01:00:04,312 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2022-03-18 01:00:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:04,313 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-03-18 01:00:04,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 42 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-03-18 01:00:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 01:00:04,314 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:04,315 INFO L500 BasicCegarLoop]: trace histogram [39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:04,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-18 01:00:04,315 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:04,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:04,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1477683710, now seen corresponding path program 39 times [2022-03-18 01:00:04,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:04,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1760956988] [2022-03-18 01:00:04,459 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash -764248136, now seen corresponding path program 1 times [2022-03-18 01:00:04,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:04,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274960963] [2022-03-18 01:00:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:04,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:04,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:04,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:04,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274960963] [2022-03-18 01:00:04,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274960963] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:04,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:04,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:05,293 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:05,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1760956988] [2022-03-18 01:00:05,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1760956988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:05,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:05,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-18 01:00:05,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877706705] [2022-03-18 01:00:05,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:05,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 01:00:05,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:05,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 01:00:05,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 01:00:05,295 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 43 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:06,319 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2022-03-18 01:00:06,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 01:00:06,319 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 43 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-03-18 01:00:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:06,321 INFO L225 Difference]: With dead ends: 129 [2022-03-18 01:00:06,322 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 01:00:06,323 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 01:00:06,324 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:06,324 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1850 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 01:00:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 01:00:06,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2022-03-18 01:00:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-03-18 01:00:06,355 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2022-03-18 01:00:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:06,355 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-03-18 01:00:06,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 43 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-03-18 01:00:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 01:00:06,357 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:06,357 INFO L500 BasicCegarLoop]: trace histogram [40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:06,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-18 01:00:06,357 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:06,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1906239454, now seen corresponding path program 40 times [2022-03-18 01:00:06,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:06,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1144756617] [2022-03-18 01:00:06,504 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:06,505 INFO L85 PathProgramCache]: Analyzing trace with hash -705142792, now seen corresponding path program 1 times [2022-03-18 01:00:06,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:06,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221974626] [2022-03-18 01:00:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:06,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:06,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:06,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:06,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221974626] [2022-03-18 01:00:06,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221974626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:06,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:06,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:07,377 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:07,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1144756617] [2022-03-18 01:00:07,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1144756617] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:07,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:07,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 01:00:07,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591904182] [2022-03-18 01:00:07,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:07,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 01:00:07,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:07,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 01:00:07,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 01:00:07,379 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:08,436 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2022-03-18 01:00:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 01:00:08,436 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-03-18 01:00:08,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:08,437 INFO L225 Difference]: With dead ends: 131 [2022-03-18 01:00:08,437 INFO L226 Difference]: Without dead ends: 72 [2022-03-18 01:00:08,438 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 01:00:08,438 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:08,439 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1964 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 01:00:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-18 01:00:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2022-03-18 01:00:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-03-18 01:00:08,463 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2022-03-18 01:00:08,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:08,464 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-03-18 01:00:08,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-03-18 01:00:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 01:00:08,464 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:08,464 INFO L500 BasicCegarLoop]: trace histogram [41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:08,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-18 01:00:08,464 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1988401666, now seen corresponding path program 41 times [2022-03-18 01:00:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:08,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [675940133] [2022-03-18 01:00:08,569 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:08,582 INFO L85 PathProgramCache]: Analyzing trace with hash -646037448, now seen corresponding path program 1 times [2022-03-18 01:00:08,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:08,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176191060] [2022-03-18 01:00:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:08,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:08,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:08,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:08,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176191060] [2022-03-18 01:00:08,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176191060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:08,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:08,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:09,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:09,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [675940133] [2022-03-18 01:00:09,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [675940133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:09,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:09,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-18 01:00:09,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485248475] [2022-03-18 01:00:09,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:09,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 01:00:09,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:09,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 01:00:09,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 01:00:09,300 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 45 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:10,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:10,455 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2022-03-18 01:00:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 01:00:10,455 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 45 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-03-18 01:00:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:10,456 INFO L225 Difference]: With dead ends: 133 [2022-03-18 01:00:10,456 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 01:00:10,457 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2022-03-18 01:00:10,457 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:10,457 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 01:00:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 01:00:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2022-03-18 01:00:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 states have internal predecessors, (63), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:10,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-03-18 01:00:10,482 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 61 [2022-03-18 01:00:10,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:10,482 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-03-18 01:00:10,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 45 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-03-18 01:00:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-18 01:00:10,483 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:10,483 INFO L500 BasicCegarLoop]: trace histogram [42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:10,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-18 01:00:10,483 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:10,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1831775198, now seen corresponding path program 42 times [2022-03-18 01:00:10,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:10,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1051320605] [2022-03-18 01:00:10,653 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:10,653 INFO L85 PathProgramCache]: Analyzing trace with hash -586932104, now seen corresponding path program 1 times [2022-03-18 01:00:10,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:10,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419344036] [2022-03-18 01:00:10,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:10,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:10,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:10,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:10,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419344036] [2022-03-18 01:00:10,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419344036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:10,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:10,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:11,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1051320605] [2022-03-18 01:00:11,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1051320605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:11,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:11,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 01:00:11,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224718480] [2022-03-18 01:00:11,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:11,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 01:00:11,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 01:00:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 01:00:11,472 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 47 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:12,525 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2022-03-18 01:00:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 01:00:12,526 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-03-18 01:00:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:12,526 INFO L225 Difference]: With dead ends: 135 [2022-03-18 01:00:12,526 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 01:00:12,528 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 01:00:12,528 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:12,528 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 91 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 01:00:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 01:00:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2022-03-18 01:00:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-03-18 01:00:12,563 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2022-03-18 01:00:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:12,564 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-03-18 01:00:12,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-03-18 01:00:12,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 01:00:12,564 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:12,564 INFO L500 BasicCegarLoop]: trace histogram [43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:12,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-18 01:00:12,564 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:12,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1826306, now seen corresponding path program 43 times [2022-03-18 01:00:12,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:12,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [729887285] [2022-03-18 01:00:12,733 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:12,734 INFO L85 PathProgramCache]: Analyzing trace with hash -527826760, now seen corresponding path program 1 times [2022-03-18 01:00:12,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:12,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269498112] [2022-03-18 01:00:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:12,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:12,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:12,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:12,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269498112] [2022-03-18 01:00:12,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269498112] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:12,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:12,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:13,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:13,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [729887285] [2022-03-18 01:00:13,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [729887285] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:13,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:13,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-18 01:00:13,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869380586] [2022-03-18 01:00:13,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:13,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 01:00:13,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:13,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 01:00:13,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 01:00:13,666 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:15,357 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2022-03-18 01:00:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 01:00:15,358 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-03-18 01:00:15,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:15,359 INFO L225 Difference]: With dead ends: 137 [2022-03-18 01:00:15,359 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 01:00:15,360 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 01:00:15,360 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:15,361 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 01:00:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 01:00:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-03-18 01:00:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 62 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-03-18 01:00:15,388 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 63 [2022-03-18 01:00:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:15,388 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-03-18 01:00:15,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:15,389 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-03-18 01:00:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 01:00:15,389 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:15,389 INFO L500 BasicCegarLoop]: trace histogram [44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:15,389 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-18 01:00:15,389 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:15,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1008898082, now seen corresponding path program 44 times [2022-03-18 01:00:15,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:15,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [437306367] [2022-03-18 01:00:15,550 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:15,551 INFO L85 PathProgramCache]: Analyzing trace with hash -468721416, now seen corresponding path program 1 times [2022-03-18 01:00:15,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:15,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699046343] [2022-03-18 01:00:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:15,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:15,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:15,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699046343] [2022-03-18 01:00:15,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699046343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:15,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:15,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:16,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:16,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [437306367] [2022-03-18 01:00:16,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [437306367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:16,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:16,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-18 01:00:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800424661] [2022-03-18 01:00:16,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:16,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 01:00:16,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:16,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 01:00:16,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 01:00:16,303 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:18,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:18,213 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2022-03-18 01:00:18,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 01:00:18,214 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-03-18 01:00:18,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:18,214 INFO L225 Difference]: With dead ends: 139 [2022-03-18 01:00:18,214 INFO L226 Difference]: Without dead ends: 76 [2022-03-18 01:00:18,215 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2022-03-18 01:00:18,215 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2805 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:18,215 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 216 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2805 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 01:00:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-18 01:00:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-03-18 01:00:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-03-18 01:00:18,246 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2022-03-18 01:00:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:18,246 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-03-18 01:00:18,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-03-18 01:00:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 01:00:18,247 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:18,248 INFO L500 BasicCegarLoop]: trace histogram [45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:18,248 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-18 01:00:18,249 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:18,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:18,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2131615230, now seen corresponding path program 45 times [2022-03-18 01:00:18,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:18,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386363945] [2022-03-18 01:00:18,413 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:18,414 INFO L85 PathProgramCache]: Analyzing trace with hash -409616072, now seen corresponding path program 1 times [2022-03-18 01:00:18,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:18,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000979555] [2022-03-18 01:00:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:18,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:18,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:18,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:18,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000979555] [2022-03-18 01:00:18,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000979555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:18,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:18,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:19,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:19,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386363945] [2022-03-18 01:00:19,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386363945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:19,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:19,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-18 01:00:19,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706405425] [2022-03-18 01:00:19,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:19,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 01:00:19,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:19,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 01:00:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 01:00:19,402 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:21,123 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2022-03-18 01:00:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 01:00:21,123 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-03-18 01:00:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:21,124 INFO L225 Difference]: With dead ends: 141 [2022-03-18 01:00:21,124 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 01:00:21,125 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 01:00:21,125 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:21,125 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 76 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 01:00:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 01:00:21,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2022-03-18 01:00:21,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-03-18 01:00:21,167 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 65 [2022-03-18 01:00:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:21,167 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-03-18 01:00:21,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-03-18 01:00:21,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 01:00:21,168 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:21,168 INFO L500 BasicCegarLoop]: trace histogram [46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:21,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-18 01:00:21,168 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:21,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:21,169 INFO L85 PathProgramCache]: Analyzing trace with hash -703280094, now seen corresponding path program 46 times [2022-03-18 01:00:21,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:21,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [635306562] [2022-03-18 01:00:21,338 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:21,339 INFO L85 PathProgramCache]: Analyzing trace with hash -350510728, now seen corresponding path program 1 times [2022-03-18 01:00:21,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:21,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980639944] [2022-03-18 01:00:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:21,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:21,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:21,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:21,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980639944] [2022-03-18 01:00:21,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980639944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:21,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:21,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:22,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:22,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [635306562] [2022-03-18 01:00:22,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [635306562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:22,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:22,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-18 01:00:22,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59019058] [2022-03-18 01:00:22,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:22,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 01:00:22,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:22,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 01:00:22,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 01:00:22,211 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:23,739 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2022-03-18 01:00:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 01:00:23,740 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-03-18 01:00:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:23,740 INFO L225 Difference]: With dead ends: 143 [2022-03-18 01:00:23,740 INFO L226 Difference]: Without dead ends: 78 [2022-03-18 01:00:23,741 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=432, Invalid=9270, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 01:00:23,741 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2649 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 2755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:23,741 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 91 Invalid, 2755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2649 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 01:00:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-18 01:00:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-03-18 01:00:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-03-18 01:00:23,771 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2022-03-18 01:00:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:23,771 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-03-18 01:00:23,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:23,771 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-03-18 01:00:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 01:00:23,772 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:23,772 INFO L500 BasicCegarLoop]: trace histogram [47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:23,772 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-18 01:00:23,772 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash 625436162, now seen corresponding path program 47 times [2022-03-18 01:00:23,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:23,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368849129] [2022-03-18 01:00:23,911 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash -291405384, now seen corresponding path program 1 times [2022-03-18 01:00:23,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:23,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639597299] [2022-03-18 01:00:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:23,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:23,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:23,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:23,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639597299] [2022-03-18 01:00:23,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639597299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:23,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:23,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:25,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:25,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368849129] [2022-03-18 01:00:25,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368849129] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:25,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:25,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-18 01:00:25,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078180859] [2022-03-18 01:00:25,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:25,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-18 01:00:25,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-18 01:00:25,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 01:00:25,149 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:27,363 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2022-03-18 01:00:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 01:00:27,364 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-03-18 01:00:27,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:27,364 INFO L225 Difference]: With dead ends: 145 [2022-03-18 01:00:27,365 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 01:00:27,366 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=441, Invalid=9659, Unknown=0, NotChecked=0, Total=10100 [2022-03-18 01:00:27,366 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:27,366 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 161 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 01:00:27,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 01:00:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2022-03-18 01:00:27,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-03-18 01:00:27,405 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 67 [2022-03-18 01:00:27,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:27,405 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-03-18 01:00:27,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-03-18 01:00:27,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 01:00:27,406 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:27,406 INFO L500 BasicCegarLoop]: trace histogram [48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:27,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-18 01:00:27,406 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:27,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:27,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1134032862, now seen corresponding path program 48 times [2022-03-18 01:00:27,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:27,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1780396470] [2022-03-18 01:00:27,607 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash -232300040, now seen corresponding path program 1 times [2022-03-18 01:00:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470983337] [2022-03-18 01:00:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:27,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:27,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:27,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:27,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470983337] [2022-03-18 01:00:27,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470983337] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:27,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:27,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:28,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:28,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1780396470] [2022-03-18 01:00:28,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1780396470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:28,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:28,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 01:00:28,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215904845] [2022-03-18 01:00:28,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:28,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 01:00:28,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:28,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 01:00:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 01:00:28,711 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:30,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:30,986 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2022-03-18 01:00:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 01:00:30,987 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-03-18 01:00:30,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:30,987 INFO L225 Difference]: With dead ends: 147 [2022-03-18 01:00:30,987 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 01:00:30,989 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=450, Invalid=10056, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 01:00:30,989 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 3326 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:30,989 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 261 Invalid, 3437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3326 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 01:00:30,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 01:00:31,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-03-18 01:00:31,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-03-18 01:00:31,037 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2022-03-18 01:00:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:31,037 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-03-18 01:00:31,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-03-18 01:00:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 01:00:31,038 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:31,038 INFO L500 BasicCegarLoop]: trace histogram [49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:31,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-18 01:00:31,038 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:31,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:31,038 INFO L85 PathProgramCache]: Analyzing trace with hash 157002242, now seen corresponding path program 49 times [2022-03-18 01:00:31,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:31,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1670299014] [2022-03-18 01:00:31,185 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:31,185 INFO L85 PathProgramCache]: Analyzing trace with hash -173194696, now seen corresponding path program 1 times [2022-03-18 01:00:31,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:31,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442168385] [2022-03-18 01:00:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:31,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:31,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:31,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:31,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442168385] [2022-03-18 01:00:31,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442168385] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:31,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:31,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:32,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1670299014] [2022-03-18 01:00:32,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1670299014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:32,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:32,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-18 01:00:32,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198051060] [2022-03-18 01:00:32,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:32,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-18 01:00:32,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:32,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-18 01:00:32,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 01:00:32,310 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 54 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 53 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:34,325 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2022-03-18 01:00:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-18 01:00:34,326 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 53 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-03-18 01:00:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:34,327 INFO L225 Difference]: With dead ends: 149 [2022-03-18 01:00:34,327 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 01:00:34,328 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=459, Invalid=10461, Unknown=0, NotChecked=0, Total=10920 [2022-03-18 01:00:34,328 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2870 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:34,328 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 2983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2870 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 01:00:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 01:00:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2022-03-18 01:00:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 68 states have internal predecessors, (71), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-03-18 01:00:34,366 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2022-03-18 01:00:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:34,366 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-03-18 01:00:34,366 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 53 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-03-18 01:00:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-18 01:00:34,366 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:34,366 INFO L500 BasicCegarLoop]: trace histogram [50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:34,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-18 01:00:34,367 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:34,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1524384802, now seen corresponding path program 50 times [2022-03-18 01:00:34,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:34,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1106032168] [2022-03-18 01:00:34,581 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:34,581 INFO L85 PathProgramCache]: Analyzing trace with hash -114089352, now seen corresponding path program 1 times [2022-03-18 01:00:34,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:34,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070536554] [2022-03-18 01:00:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:34,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:34,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:34,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:34,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070536554] [2022-03-18 01:00:34,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070536554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:34,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:34,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:35,858 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:35,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1106032168] [2022-03-18 01:00:35,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1106032168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:35,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:35,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-18 01:00:35,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605959194] [2022-03-18 01:00:35,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:35,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 01:00:35,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 01:00:35,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 01:00:35,860 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:38,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:38,186 INFO L93 Difference]: Finished difference Result 151 states and 160 transitions. [2022-03-18 01:00:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 01:00:38,187 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-03-18 01:00:38,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:38,187 INFO L225 Difference]: With dead ends: 151 [2022-03-18 01:00:38,187 INFO L226 Difference]: Without dead ends: 82 [2022-03-18 01:00:38,188 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=468, Invalid=10874, Unknown=0, NotChecked=0, Total=11342 [2022-03-18 01:00:38,188 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3383 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:38,188 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 206 Invalid, 3497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3383 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 01:00:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-18 01:00:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-03-18 01:00:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-03-18 01:00:38,222 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2022-03-18 01:00:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:38,222 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-03-18 01:00:38,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-03-18 01:00:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 01:00:38,241 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:38,241 INFO L500 BasicCegarLoop]: trace histogram [51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:38,241 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-18 01:00:38,241 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:38,241 INFO L85 PathProgramCache]: Analyzing trace with hash 963571202, now seen corresponding path program 51 times [2022-03-18 01:00:38,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:38,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1363456842] [2022-03-18 01:00:38,437 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:38,438 INFO L85 PathProgramCache]: Analyzing trace with hash -54984008, now seen corresponding path program 1 times [2022-03-18 01:00:38,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:38,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816818959] [2022-03-18 01:00:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:38,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:38,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:38,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:38,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816818959] [2022-03-18 01:00:38,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816818959] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:38,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:38,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:39,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:39,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1363456842] [2022-03-18 01:00:39,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1363456842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:39,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:39,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-18 01:00:39,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464699649] [2022-03-18 01:00:39,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:39,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-18 01:00:39,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-18 01:00:39,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 01:00:39,526 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:41,597 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2022-03-18 01:00:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 01:00:41,597 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-03-18 01:00:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:41,598 INFO L225 Difference]: With dead ends: 153 [2022-03-18 01:00:41,598 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 01:00:41,599 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=477, Invalid=11295, Unknown=0, NotChecked=0, Total=11772 [2022-03-18 01:00:41,599 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3113 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 3229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:41,599 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 3229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3113 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 01:00:41,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 01:00:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2022-03-18 01:00:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-03-18 01:00:41,634 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 71 [2022-03-18 01:00:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:41,634 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-03-18 01:00:41,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-03-18 01:00:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-18 01:00:41,635 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:41,635 INFO L500 BasicCegarLoop]: trace histogram [52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:41,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-18 01:00:41,635 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:41,635 INFO L85 PathProgramCache]: Analyzing trace with hash 758218786, now seen corresponding path program 52 times [2022-03-18 01:00:41,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:41,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1776311707] [2022-03-18 01:00:41,783 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:41,784 INFO L85 PathProgramCache]: Analyzing trace with hash 4121336, now seen corresponding path program 1 times [2022-03-18 01:00:41,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:41,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228209018] [2022-03-18 01:00:41,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:41,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:41,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:41,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:41,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228209018] [2022-03-18 01:00:41,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228209018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:41,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:41,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:43,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:43,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1776311707] [2022-03-18 01:00:43,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1776311707] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:43,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:43,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-18 01:00:43,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335647888] [2022-03-18 01:00:43,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:43,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 01:00:43,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 01:00:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 01:00:43,043 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 56 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:45,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:45,174 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2022-03-18 01:00:45,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 01:00:45,175 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 56 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-03-18 01:00:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:45,176 INFO L225 Difference]: With dead ends: 155 [2022-03-18 01:00:45,176 INFO L226 Difference]: Without dead ends: 84 [2022-03-18 01:00:45,177 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=486, Invalid=11724, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 01:00:45,177 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3390 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 3509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:45,177 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 131 Invalid, 3509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 3390 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 01:00:45,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-18 01:00:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2022-03-18 01:00:45,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-03-18 01:00:45,213 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2022-03-18 01:00:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:45,214 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-03-18 01:00:45,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 56 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:45,214 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-03-18 01:00:45,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 01:00:45,214 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:45,214 INFO L500 BasicCegarLoop]: trace histogram [53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:45,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-18 01:00:45,214 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:45,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:45,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1312738814, now seen corresponding path program 53 times [2022-03-18 01:00:45,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:45,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1571566961] [2022-03-18 01:00:45,359 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash 63226680, now seen corresponding path program 1 times [2022-03-18 01:00:45,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:45,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157114922] [2022-03-18 01:00:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:45,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:45,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:45,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:45,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157114922] [2022-03-18 01:00:45,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157114922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:45,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:45,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:46,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:46,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1571566961] [2022-03-18 01:00:46,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1571566961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:46,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:46,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-18 01:00:46,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141882467] [2022-03-18 01:00:46,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:46,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-18 01:00:46,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-18 01:00:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 01:00:46,782 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:49,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:49,227 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2022-03-18 01:00:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 01:00:49,227 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-03-18 01:00:49,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:49,228 INFO L225 Difference]: With dead ends: 157 [2022-03-18 01:00:49,228 INFO L226 Difference]: Without dead ends: 85 [2022-03-18 01:00:49,229 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=495, Invalid=12161, Unknown=0, NotChecked=0, Total=12656 [2022-03-18 01:00:49,229 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 3923 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 4043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 3923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:49,229 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 281 Invalid, 4043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 3923 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 01:00:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-18 01:00:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2022-03-18 01:00:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-03-18 01:00:49,268 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 73 [2022-03-18 01:00:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:49,268 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-03-18 01:00:49,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-03-18 01:00:49,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 01:00:49,269 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:49,269 INFO L500 BasicCegarLoop]: trace histogram [54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:49,269 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-18 01:00:49,269 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:49,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1087914974, now seen corresponding path program 54 times [2022-03-18 01:00:49,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:49,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [104759415] [2022-03-18 01:00:49,428 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:49,428 INFO L85 PathProgramCache]: Analyzing trace with hash 122332024, now seen corresponding path program 1 times [2022-03-18 01:00:49,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:49,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074333178] [2022-03-18 01:00:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:49,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:49,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:49,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:49,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074333178] [2022-03-18 01:00:49,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074333178] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:49,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:49,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:50,469 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:50,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [104759415] [2022-03-18 01:00:50,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [104759415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:50,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:50,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-18 01:00:50,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31774441] [2022-03-18 01:00:50,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:50,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 01:00:50,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:50,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 01:00:50,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 01:00:50,471 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:52,506 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2022-03-18 01:00:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 01:00:52,507 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-03-18 01:00:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:52,508 INFO L225 Difference]: With dead ends: 159 [2022-03-18 01:00:52,508 INFO L226 Difference]: Without dead ends: 86 [2022-03-18 01:00:52,510 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=504, Invalid=12606, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 01:00:52,510 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 3532 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 3655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:52,510 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 101 Invalid, 3655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3532 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 01:00:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-18 01:00:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2022-03-18 01:00:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-03-18 01:00:52,558 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2022-03-18 01:00:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:52,558 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-03-18 01:00:52,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-03-18 01:00:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 01:00:52,559 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:52,559 INFO L500 BasicCegarLoop]: trace histogram [55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:52,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-18 01:00:52,559 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1586656770, now seen corresponding path program 55 times [2022-03-18 01:00:52,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:52,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [791834493] [2022-03-18 01:00:52,705 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:52,706 INFO L85 PathProgramCache]: Analyzing trace with hash 181437368, now seen corresponding path program 1 times [2022-03-18 01:00:52,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:52,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849514910] [2022-03-18 01:00:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:52,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:52,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:52,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:52,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849514910] [2022-03-18 01:00:52,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849514910] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:52,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:52,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:54,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:54,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [791834493] [2022-03-18 01:00:54,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [791834493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:54,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:54,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-18 01:00:54,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457938734] [2022-03-18 01:00:54,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:54,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-18 01:00:54,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:54,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-18 01:00:54,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 01:00:54,001 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:56,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:00:56,198 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2022-03-18 01:00:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-18 01:00:56,198 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-03-18 01:00:56,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:00:56,199 INFO L225 Difference]: With dead ends: 161 [2022-03-18 01:00:56,199 INFO L226 Difference]: Without dead ends: 87 [2022-03-18 01:00:56,200 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=513, Invalid=13059, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 01:00:56,200 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3747 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 3871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:00:56,201 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 136 Invalid, 3871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3747 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 01:00:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-18 01:00:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2022-03-18 01:00:56,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:00:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-03-18 01:00:56,275 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 75 [2022-03-18 01:00:56,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:00:56,276 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-03-18 01:00:56,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:00:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-03-18 01:00:56,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-18 01:00:56,276 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:00:56,276 INFO L500 BasicCegarLoop]: trace histogram [56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:00:56,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-18 01:00:56,276 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:00:56,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:00:56,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1400965086, now seen corresponding path program 56 times [2022-03-18 01:00:56,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:56,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1445185303] [2022-03-18 01:00:56,484 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:00:56,485 INFO L85 PathProgramCache]: Analyzing trace with hash 240542712, now seen corresponding path program 1 times [2022-03-18 01:00:56,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:00:56,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081863050] [2022-03-18 01:00:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:00:56,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:00:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:56,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:00:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:00:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:00:56,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:00:56,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081863050] [2022-03-18 01:00:56,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081863050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:56,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:56,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:00:57,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:00:57,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1445185303] [2022-03-18 01:00:57,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1445185303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:00:57,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:00:57,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-18 01:00:57,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172866057] [2022-03-18 01:00:57,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:00:57,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-18 01:00:57,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:00:57,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-18 01:00:57,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 01:00:57,793 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 60 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:00,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:00,291 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2022-03-18 01:01:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 01:01:00,292 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 60 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-03-18 01:01:00,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:00,292 INFO L225 Difference]: With dead ends: 163 [2022-03-18 01:01:00,292 INFO L226 Difference]: Without dead ends: 88 [2022-03-18 01:01:00,293 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=522, Invalid=13520, Unknown=0, NotChecked=0, Total=14042 [2022-03-18 01:01:00,293 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3710 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 3837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:00,293 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 81 Invalid, 3837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3710 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 01:01:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-18 01:01:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-03-18 01:01:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-03-18 01:01:00,338 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2022-03-18 01:01:00,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:00,339 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-03-18 01:01:00,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 60 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-03-18 01:01:00,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 01:01:00,339 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:00,339 INFO L500 BasicCegarLoop]: trace histogram [57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:00,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-18 01:01:00,339 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:00,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:00,339 INFO L85 PathProgramCache]: Analyzing trace with hash 472037890, now seen corresponding path program 57 times [2022-03-18 01:01:00,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:00,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [423380525] [2022-03-18 01:01:00,531 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash 299648056, now seen corresponding path program 1 times [2022-03-18 01:01:00,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:00,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536316335] [2022-03-18 01:01:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:00,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:00,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:00,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:00,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536316335] [2022-03-18 01:01:00,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536316335] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:00,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:00,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:01:02,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:02,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [423380525] [2022-03-18 01:01:02,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [423380525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:02,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:02,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-18 01:01:02,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631227221] [2022-03-18 01:01:02,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:02,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-18 01:01:02,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:02,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-18 01:01:02,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 01:01:02,087 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 62 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:04,991 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2022-03-18 01:01:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-18 01:01:04,991 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 77 [2022-03-18 01:01:04,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:04,992 INFO L225 Difference]: With dead ends: 165 [2022-03-18 01:01:04,992 INFO L226 Difference]: Without dead ends: 89 [2022-03-18 01:01:04,993 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=531, Invalid=13989, Unknown=0, NotChecked=0, Total=14520 [2022-03-18 01:01:04,998 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4167 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:04,998 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 201 Invalid, 4295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4167 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 01:01:04,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-18 01:01:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2022-03-18 01:01:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 76 states have internal predecessors, (79), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-03-18 01:01:05,060 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 77 [2022-03-18 01:01:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:05,060 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-03-18 01:01:05,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:05,062 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-03-18 01:01:05,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-18 01:01:05,062 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:05,062 INFO L500 BasicCegarLoop]: trace histogram [58, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:05,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-18 01:01:05,062 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1594411998, now seen corresponding path program 58 times [2022-03-18 01:01:05,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:05,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012225810] [2022-03-18 01:01:05,206 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:05,207 INFO L85 PathProgramCache]: Analyzing trace with hash 358753400, now seen corresponding path program 1 times [2022-03-18 01:01:05,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:05,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563042310] [2022-03-18 01:01:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:05,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:05,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:05,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:05,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563042310] [2022-03-18 01:01:05,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563042310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:05,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:05,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:01:06,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:06,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2012225810] [2022-03-18 01:01:06,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2012225810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:06,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:06,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-18 01:01:06,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556894384] [2022-03-18 01:01:06,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:06,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 01:01:06,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:06,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 01:01:06,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 01:01:06,825 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 63 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:09,955 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2022-03-18 01:01:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 01:01:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-03-18 01:01:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:09,956 INFO L225 Difference]: With dead ends: 167 [2022-03-18 01:01:09,956 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 01:01:09,957 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=540, Invalid=14466, Unknown=0, NotChecked=0, Total=15006 [2022-03-18 01:01:09,958 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 4373 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 4503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 4373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:09,958 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 231 Invalid, 4503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 4373 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 01:01:09,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 01:01:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2022-03-18 01:01:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-03-18 01:01:10,003 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2022-03-18 01:01:10,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:10,003 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-03-18 01:01:10,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:10,003 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-03-18 01:01:10,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 01:01:10,004 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:10,004 INFO L500 BasicCegarLoop]: trace histogram [59, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:10,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-18 01:01:10,004 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:10,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1229849086, now seen corresponding path program 59 times [2022-03-18 01:01:10,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:10,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [398365638] [2022-03-18 01:01:10,176 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash 417858744, now seen corresponding path program 1 times [2022-03-18 01:01:10,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:10,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646086696] [2022-03-18 01:01:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:10,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:10,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:10,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:10,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646086696] [2022-03-18 01:01:10,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646086696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:10,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:10,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:01:11,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:11,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [398365638] [2022-03-18 01:01:11,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [398365638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:11,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:11,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-18 01:01:11,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483984876] [2022-03-18 01:01:11,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:11,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-18 01:01:11,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:11,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-18 01:01:11,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 01:01:11,834 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 64 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:14,486 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2022-03-18 01:01:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-18 01:01:14,486 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-03-18 01:01:14,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:14,487 INFO L225 Difference]: With dead ends: 169 [2022-03-18 01:01:14,487 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 01:01:14,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=549, Invalid=14951, Unknown=0, NotChecked=0, Total=15500 [2022-03-18 01:01:14,488 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4356 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 4489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 4356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:14,497 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 181 Invalid, 4489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 4356 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 01:01:14,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 01:01:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-03-18 01:01:14,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:14,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-03-18 01:01:14,545 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 79 [2022-03-18 01:01:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:14,545 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-03-18 01:01:14,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-03-18 01:01:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 01:01:14,545 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:14,545 INFO L500 BasicCegarLoop]: trace histogram [60, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:14,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-18 01:01:14,545 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:14,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1481666594, now seen corresponding path program 60 times [2022-03-18 01:01:14,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:14,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [573570755] [2022-03-18 01:01:14,714 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:14,714 INFO L85 PathProgramCache]: Analyzing trace with hash 476964088, now seen corresponding path program 1 times [2022-03-18 01:01:14,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:14,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14904120] [2022-03-18 01:01:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:14,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:14,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:14,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:14,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14904120] [2022-03-18 01:01:14,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14904120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:14,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:14,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:01:16,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:16,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [573570755] [2022-03-18 01:01:16,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [573570755] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:16,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:16,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-18 01:01:16,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872561823] [2022-03-18 01:01:16,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:16,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-18 01:01:16,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:16,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-18 01:01:16,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2022-03-18 01:01:16,428 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:19,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:19,594 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2022-03-18 01:01:19,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 01:01:19,594 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 80 [2022-03-18 01:01:19,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:19,595 INFO L225 Difference]: With dead ends: 171 [2022-03-18 01:01:19,595 INFO L226 Difference]: Without dead ends: 92 [2022-03-18 01:01:19,596 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=558, Invalid=15444, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 01:01:19,596 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 4749 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 4883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 4749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:19,596 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 276 Invalid, 4883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 4749 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 01:01:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-18 01:01:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-03-18 01:01:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 79 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-03-18 01:01:19,646 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2022-03-18 01:01:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:19,646 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-03-18 01:01:19,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-03-18 01:01:19,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 01:01:19,647 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:19,647 INFO L500 BasicCegarLoop]: trace histogram [61, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:19,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-18 01:01:19,647 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash -360693246, now seen corresponding path program 61 times [2022-03-18 01:01:19,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:19,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [406266017] [2022-03-18 01:01:19,810 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:19,810 INFO L85 PathProgramCache]: Analyzing trace with hash 536069432, now seen corresponding path program 1 times [2022-03-18 01:01:19,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:19,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305608416] [2022-03-18 01:01:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:19,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:19,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:19,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:19,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305608416] [2022-03-18 01:01:19,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305608416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:19,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:19,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:01:21,450 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:21,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [406266017] [2022-03-18 01:01:21,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [406266017] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:21,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:21,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-18 01:01:21,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555580756] [2022-03-18 01:01:21,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:21,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-18 01:01:21,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-18 01:01:21,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 01:01:21,452 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 66 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:24,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:24,016 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2022-03-18 01:01:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-18 01:01:24,016 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 81 [2022-03-18 01:01:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:24,017 INFO L225 Difference]: With dead ends: 173 [2022-03-18 01:01:24,017 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 01:01:24,018 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=567, Invalid=15945, Unknown=0, NotChecked=0, Total=16512 [2022-03-18 01:01:24,018 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 4975 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 5111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 4975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:24,018 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 311 Invalid, 5111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 4975 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 01:01:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 01:01:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2022-03-18 01:01:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 80 states have internal predecessors, (83), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-03-18 01:01:24,066 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 81 [2022-03-18 01:01:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:24,067 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-03-18 01:01:24,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-03-18 01:01:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-18 01:01:24,067 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:24,067 INFO L500 BasicCegarLoop]: trace histogram [62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:24,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-18 01:01:24,068 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1639273438, now seen corresponding path program 62 times [2022-03-18 01:01:24,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:24,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1177437391] [2022-03-18 01:01:24,262 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:24,262 INFO L85 PathProgramCache]: Analyzing trace with hash 595174776, now seen corresponding path program 1 times [2022-03-18 01:01:24,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:24,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755903596] [2022-03-18 01:01:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:24,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:24,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:24,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:24,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755903596] [2022-03-18 01:01:24,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755903596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:24,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:24,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:01:25,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:25,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1177437391] [2022-03-18 01:01:25,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1177437391] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:25,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:25,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-18 01:01:25,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722254686] [2022-03-18 01:01:25,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:25,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-18 01:01:25,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-18 01:01:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 01:01:25,494 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:28,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:28,457 INFO L93 Difference]: Finished difference Result 175 states and 184 transitions. [2022-03-18 01:01:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 01:01:28,458 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-03-18 01:01:28,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:28,459 INFO L225 Difference]: With dead ends: 175 [2022-03-18 01:01:28,459 INFO L226 Difference]: Without dead ends: 94 [2022-03-18 01:01:28,460 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=576, Invalid=16454, Unknown=0, NotChecked=0, Total=17030 [2022-03-18 01:01:28,461 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 4978 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 5117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:28,461 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 266 Invalid, 5117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4978 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 01:01:28,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-18 01:01:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-03-18 01:01:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.05) internal successors, (84), 81 states have internal predecessors, (84), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-03-18 01:01:28,511 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2022-03-18 01:01:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:28,511 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-03-18 01:01:28,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-03-18 01:01:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 01:01:28,512 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:28,512 INFO L500 BasicCegarLoop]: trace histogram [63, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:28,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-03-18 01:01:28,512 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:28,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1674413570, now seen corresponding path program 63 times [2022-03-18 01:01:28,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:28,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1527340686] [2022-03-18 01:01:28,711 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash 654280120, now seen corresponding path program 1 times [2022-03-18 01:01:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:28,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947509389] [2022-03-18 01:01:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:28,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:28,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:28,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947509389] [2022-03-18 01:01:28,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947509389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:28,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:28,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:01:29,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:29,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1527340686] [2022-03-18 01:01:29,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1527340686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:29,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:29,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-18 01:01:29,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547899090] [2022-03-18 01:01:29,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:29,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-18 01:01:29,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:29,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-18 01:01:29,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 01:01:29,945 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:32,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:32,432 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2022-03-18 01:01:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 01:01:32,433 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2022-03-18 01:01:32,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:32,433 INFO L225 Difference]: With dead ends: 177 [2022-03-18 01:01:32,433 INFO L226 Difference]: Without dead ends: 95 [2022-03-18 01:01:32,435 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=585, Invalid=16971, Unknown=0, NotChecked=0, Total=17556 [2022-03-18 01:01:32,435 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 5125 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 5265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 5125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:32,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 271 Invalid, 5265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 5125 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 01:01:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-18 01:01:32,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2022-03-18 01:01:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 states have internal predecessors, (85), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:32,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-03-18 01:01:32,486 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 83 [2022-03-18 01:01:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:32,487 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-03-18 01:01:32,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:32,487 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-03-18 01:01:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-18 01:01:32,487 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:32,487 INFO L500 BasicCegarLoop]: trace histogram [64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:32,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-03-18 01:01:32,487 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1319495714, now seen corresponding path program 64 times [2022-03-18 01:01:32,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:32,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [187040417] [2022-03-18 01:01:32,627 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:32,628 INFO L85 PathProgramCache]: Analyzing trace with hash 713385464, now seen corresponding path program 1 times [2022-03-18 01:01:32,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:32,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411608438] [2022-03-18 01:01:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:32,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:32,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:32,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:32,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411608438] [2022-03-18 01:01:32,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411608438] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:32,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:32,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:01:34,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:34,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [187040417] [2022-03-18 01:01:34,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [187040417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:34,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:34,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-18 01:01:34,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611686428] [2022-03-18 01:01:34,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:34,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-18 01:01:34,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:34,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-18 01:01:34,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 01:01:34,408 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 69 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 68 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:37,882 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2022-03-18 01:01:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 01:01:37,883 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 68 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 84 [2022-03-18 01:01:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:37,883 INFO L225 Difference]: With dead ends: 179 [2022-03-18 01:01:37,883 INFO L226 Difference]: Without dead ends: 96 [2022-03-18 01:01:37,885 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=594, Invalid=17496, Unknown=0, NotChecked=0, Total=18090 [2022-03-18 01:01:37,885 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4740 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 4883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 4740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:37,885 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 4883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 4740 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 01:01:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-18 01:01:37,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-03-18 01:01:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-03-18 01:01:37,943 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2022-03-18 01:01:37,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:37,943 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-03-18 01:01:37,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 68 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:37,943 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-03-18 01:01:37,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 01:01:37,943 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:37,943 INFO L500 BasicCegarLoop]: trace histogram [65, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:37,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-03-18 01:01:37,943 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:37,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1093023230, now seen corresponding path program 65 times [2022-03-18 01:01:37,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:37,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [317757684] [2022-03-18 01:01:38,162 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:38,163 INFO L85 PathProgramCache]: Analyzing trace with hash 772490808, now seen corresponding path program 1 times [2022-03-18 01:01:38,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:38,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605586529] [2022-03-18 01:01:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:38,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:38,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:38,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:38,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605586529] [2022-03-18 01:01:38,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605586529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:38,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:38,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:01:40,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:40,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [317757684] [2022-03-18 01:01:40,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [317757684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:40,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:40,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-18 01:01:40,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360636520] [2022-03-18 01:01:40,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:40,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 01:01:40,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:40,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 01:01:40,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 01:01:40,010 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:43,222 INFO L93 Difference]: Finished difference Result 181 states and 190 transitions. [2022-03-18 01:01:43,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-18 01:01:43,222 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-03-18 01:01:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:43,222 INFO L225 Difference]: With dead ends: 181 [2022-03-18 01:01:43,223 INFO L226 Difference]: Without dead ends: 97 [2022-03-18 01:01:43,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=603, Invalid=18029, Unknown=0, NotChecked=0, Total=18632 [2022-03-18 01:01:43,224 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4722 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 4867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 4722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:43,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 4867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 4722 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 01:01:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-18 01:01:43,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2022-03-18 01:01:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 84 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2022-03-18 01:01:43,276 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 85 [2022-03-18 01:01:43,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:43,277 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2022-03-18 01:01:43,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:43,277 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2022-03-18 01:01:43,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 01:01:43,277 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:43,277 INFO L500 BasicCegarLoop]: trace histogram [66, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:43,277 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-03-18 01:01:43,277 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:43,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:43,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1428300834, now seen corresponding path program 66 times [2022-03-18 01:01:43,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:43,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1165625340] [2022-03-18 01:01:43,397 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:43,397 INFO L85 PathProgramCache]: Analyzing trace with hash 831596152, now seen corresponding path program 1 times [2022-03-18 01:01:43,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:43,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129084293] [2022-03-18 01:01:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:43,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:43,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:43,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:43,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129084293] [2022-03-18 01:01:43,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129084293] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:43,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:43,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:01:44,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:44,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1165625340] [2022-03-18 01:01:44,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1165625340] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:44,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:44,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-18 01:01:44,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744836094] [2022-03-18 01:01:44,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:44,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-18 01:01:44,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:44,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-18 01:01:44,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 01:01:44,697 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 71 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 70 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:47,309 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2022-03-18 01:01:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 01:01:47,310 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 70 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 86 [2022-03-18 01:01:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:47,310 INFO L225 Difference]: With dead ends: 183 [2022-03-18 01:01:47,310 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 01:01:47,311 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=612, Invalid=18570, Unknown=0, NotChecked=0, Total=19182 [2022-03-18 01:01:47,312 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 5560 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 5707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 5560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:47,312 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 281 Invalid, 5707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 5560 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 01:01:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 01:01:47,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-03-18 01:01:47,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-03-18 01:01:47,369 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2022-03-18 01:01:47,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:47,379 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-03-18 01:01:47,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 70 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-03-18 01:01:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 01:01:47,380 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:47,380 INFO L500 BasicCegarLoop]: trace histogram [67, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:47,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-03-18 01:01:47,380 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2015031806, now seen corresponding path program 67 times [2022-03-18 01:01:47,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:47,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2134697020] [2022-03-18 01:01:47,523 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:47,523 INFO L85 PathProgramCache]: Analyzing trace with hash 890701496, now seen corresponding path program 1 times [2022-03-18 01:01:47,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:47,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295173937] [2022-03-18 01:01:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:47,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:47,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:47,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:47,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295173937] [2022-03-18 01:01:47,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295173937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:47,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:47,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:01:49,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:49,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2134697020] [2022-03-18 01:01:49,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2134697020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:49,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:49,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-18 01:01:49,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048050248] [2022-03-18 01:01:49,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:49,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-18 01:01:49,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:49,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-18 01:01:49,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 01:01:49,315 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:52,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:52,983 INFO L93 Difference]: Finished difference Result 185 states and 194 transitions. [2022-03-18 01:01:52,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-18 01:01:52,983 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 87 [2022-03-18 01:01:52,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:52,984 INFO L225 Difference]: With dead ends: 185 [2022-03-18 01:01:52,984 INFO L226 Difference]: Without dead ends: 99 [2022-03-18 01:01:52,985 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=621, Invalid=19119, Unknown=0, NotChecked=0, Total=19740 [2022-03-18 01:01:52,985 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 5911 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 6059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 5911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:52,986 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 356 Invalid, 6059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 5911 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 01:01:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-18 01:01:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2022-03-18 01:01:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 86 states have internal predecessors, (89), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:53,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-03-18 01:01:53,041 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 87 [2022-03-18 01:01:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:53,042 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-03-18 01:01:53,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:53,042 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-03-18 01:01:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-18 01:01:53,042 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:53,042 INFO L500 BasicCegarLoop]: trace histogram [68, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:53,042 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-03-18 01:01:53,042 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1384161246, now seen corresponding path program 68 times [2022-03-18 01:01:53,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:53,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [731786588] [2022-03-18 01:01:53,238 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:53,239 INFO L85 PathProgramCache]: Analyzing trace with hash 949806840, now seen corresponding path program 1 times [2022-03-18 01:01:53,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:53,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972757185] [2022-03-18 01:01:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:53,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:53,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:53,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:53,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972757185] [2022-03-18 01:01:53,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972757185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:53,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:53,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:01:55,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:01:55,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [731786588] [2022-03-18 01:01:55,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [731786588] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:55,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:55,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-18 01:01:55,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544206725] [2022-03-18 01:01:55,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:01:55,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-18 01:01:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:55,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-18 01:01:55,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 01:01:55,338 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:59,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:01:59,110 INFO L93 Difference]: Finished difference Result 187 states and 196 transitions. [2022-03-18 01:01:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-18 01:01:59,110 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 88 [2022-03-18 01:01:59,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:01:59,111 INFO L225 Difference]: With dead ends: 187 [2022-03-18 01:01:59,111 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 01:01:59,112 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=630, Invalid=19676, Unknown=0, NotChecked=0, Total=20306 [2022-03-18 01:01:59,112 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 5801 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 5951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 5801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:01:59,112 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 266 Invalid, 5951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 5801 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 01:01:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 01:01:59,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-03-18 01:01:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:01:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-03-18 01:01:59,171 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2022-03-18 01:01:59,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:01:59,171 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-03-18 01:01:59,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:01:59,171 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-03-18 01:01:59,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 01:01:59,172 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:01:59,172 INFO L500 BasicCegarLoop]: trace histogram [69, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:01:59,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-03-18 01:01:59,172 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:01:59,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:01:59,172 INFO L85 PathProgramCache]: Analyzing trace with hash 992956930, now seen corresponding path program 69 times [2022-03-18 01:01:59,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:01:59,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1504931825] [2022-03-18 01:01:59,334 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:01:59,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1008912184, now seen corresponding path program 1 times [2022-03-18 01:01:59,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:01:59,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449205274] [2022-03-18 01:01:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:01:59,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:01:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:59,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:01:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:01:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:01:59,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:01:59,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449205274] [2022-03-18 01:01:59,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449205274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:01:59,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:01:59,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:02:01,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:01,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1504931825] [2022-03-18 01:02:01,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1504931825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:01,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:01,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-18 01:02:01,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384937724] [2022-03-18 01:02:01,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:01,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-18 01:02:01,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:01,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-18 01:02:01,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 01:02:01,155 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 74 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:04,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:04,686 INFO L93 Difference]: Finished difference Result 189 states and 198 transitions. [2022-03-18 01:02:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-18 01:02:04,687 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 89 [2022-03-18 01:02:04,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:04,687 INFO L225 Difference]: With dead ends: 189 [2022-03-18 01:02:04,687 INFO L226 Difference]: Without dead ends: 101 [2022-03-18 01:02:04,688 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=639, Invalid=20241, Unknown=0, NotChecked=0, Total=20880 [2022-03-18 01:02:04,688 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 6029 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 6181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 6029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:04,689 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 296 Invalid, 6181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 6029 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 01:02:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-18 01:02:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2022-03-18 01:02:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:02:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2022-03-18 01:02:04,748 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 89 [2022-03-18 01:02:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:04,748 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2022-03-18 01:02:04,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2022-03-18 01:02:04,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-18 01:02:04,749 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:04,749 INFO L500 BasicCegarLoop]: trace histogram [70, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:04,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-03-18 01:02:04,749 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:04,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1669176354, now seen corresponding path program 70 times [2022-03-18 01:02:04,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:04,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [269200339] [2022-03-18 01:02:04,891 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1068017528, now seen corresponding path program 1 times [2022-03-18 01:02:04,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:04,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649591164] [2022-03-18 01:02:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:04,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:04,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:04,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:04,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649591164] [2022-03-18 01:02:04,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649591164] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:04,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:04,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:02:06,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:06,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [269200339] [2022-03-18 01:02:06,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [269200339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:06,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:06,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-18 01:02:06,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129390659] [2022-03-18 01:02:06,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:06,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-18 01:02:06,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:06,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-18 01:02:06,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 01:02:06,908 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:10,177 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2022-03-18 01:02:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 01:02:10,177 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 90 [2022-03-18 01:02:10,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:10,178 INFO L225 Difference]: With dead ends: 191 [2022-03-18 01:02:10,178 INFO L226 Difference]: Without dead ends: 102 [2022-03-18 01:02:10,180 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=648, Invalid=20814, Unknown=0, NotChecked=0, Total=21462 [2022-03-18 01:02:10,180 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5993 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 6147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 5993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:10,180 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 231 Invalid, 6147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 5993 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 01:02:10,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-18 01:02:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2022-03-18 01:02:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:02:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-03-18 01:02:10,261 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2022-03-18 01:02:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:10,262 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-03-18 01:02:10,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:10,262 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-03-18 01:02:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 01:02:10,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:10,262 INFO L500 BasicCegarLoop]: trace histogram [71, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:10,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-03-18 01:02:10,262 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1157142018, now seen corresponding path program 71 times [2022-03-18 01:02:10,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:10,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [19674516] [2022-03-18 01:02:10,459 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:10,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1127122872, now seen corresponding path program 1 times [2022-03-18 01:02:10,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:10,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983128117] [2022-03-18 01:02:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:10,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:10,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:10,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:10,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983128117] [2022-03-18 01:02:10,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983128117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:10,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:10,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:02:12,078 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:12,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [19674516] [2022-03-18 01:02:12,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [19674516] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:12,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:12,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-18 01:02:12,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809600909] [2022-03-18 01:02:12,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:12,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-18 01:02:12,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:12,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-18 01:02:12,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 01:02:12,080 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:15,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:15,280 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2022-03-18 01:02:15,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-18 01:02:15,280 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 91 [2022-03-18 01:02:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:15,281 INFO L225 Difference]: With dead ends: 193 [2022-03-18 01:02:15,281 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 01:02:15,282 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=657, Invalid=21395, Unknown=0, NotChecked=0, Total=22052 [2022-03-18 01:02:15,282 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 5679 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 5679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:15,282 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 5835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 5679 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 01:02:15,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 01:02:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2022-03-18 01:02:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 90 states have internal predecessors, (93), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:02:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-03-18 01:02:15,359 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 91 [2022-03-18 01:02:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:15,359 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-03-18 01:02:15,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-03-18 01:02:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 01:02:15,359 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:15,360 INFO L500 BasicCegarLoop]: trace histogram [72, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:15,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-03-18 01:02:15,360 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:15,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:15,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1831020510, now seen corresponding path program 72 times [2022-03-18 01:02:15,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:15,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1913844302] [2022-03-18 01:02:15,535 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:15,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1186228216, now seen corresponding path program 1 times [2022-03-18 01:02:15,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:15,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857658049] [2022-03-18 01:02:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:15,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:15,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:15,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:15,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857658049] [2022-03-18 01:02:15,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857658049] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:15,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:15,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:02:17,415 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:17,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1913844302] [2022-03-18 01:02:17,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1913844302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:17,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:17,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-18 01:02:17,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819978525] [2022-03-18 01:02:17,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:17,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-18 01:02:17,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-18 01:02:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2022-03-18 01:02:17,417 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:21,332 INFO L93 Difference]: Finished difference Result 195 states and 204 transitions. [2022-03-18 01:02:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-18 01:02:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 92 [2022-03-18 01:02:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:21,333 INFO L225 Difference]: With dead ends: 195 [2022-03-18 01:02:21,333 INFO L226 Difference]: Without dead ends: 104 [2022-03-18 01:02:21,334 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=666, Invalid=21984, Unknown=0, NotChecked=0, Total=22650 [2022-03-18 01:02:21,334 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 6472 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 6631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 6472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:21,334 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 296 Invalid, 6631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 6472 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 01:02:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-18 01:02:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-03-18 01:02:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:02:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-03-18 01:02:21,400 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2022-03-18 01:02:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:21,400 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-03-18 01:02:21,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-03-18 01:02:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 01:02:21,400 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:21,400 INFO L500 BasicCegarLoop]: trace histogram [73, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:21,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-03-18 01:02:21,401 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:21,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:21,401 INFO L85 PathProgramCache]: Analyzing trace with hash 25221634, now seen corresponding path program 73 times [2022-03-18 01:02:21,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:21,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [887215265] [2022-03-18 01:02:21,575 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:21,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1245333560, now seen corresponding path program 1 times [2022-03-18 01:02:21,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:21,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610432006] [2022-03-18 01:02:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:21,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:21,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:21,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:21,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610432006] [2022-03-18 01:02:21,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610432006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:21,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:21,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:02:23,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:23,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [887215265] [2022-03-18 01:02:23,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [887215265] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:23,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:23,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-18 01:02:23,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454393528] [2022-03-18 01:02:23,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:23,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-18 01:02:23,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:23,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-18 01:02:23,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 01:02:23,167 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:26,641 INFO L93 Difference]: Finished difference Result 197 states and 206 transitions. [2022-03-18 01:02:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-18 01:02:26,641 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 93 [2022-03-18 01:02:26,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:26,642 INFO L225 Difference]: With dead ends: 197 [2022-03-18 01:02:26,642 INFO L226 Difference]: Without dead ends: 105 [2022-03-18 01:02:26,643 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=675, Invalid=22581, Unknown=0, NotChecked=0, Total=23256 [2022-03-18 01:02:26,643 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 6877 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 7037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 6877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:26,643 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 386 Invalid, 7037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 6877 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 01:02:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-18 01:02:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-03-18 01:02:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 91 states have (on average 1.043956043956044) internal successors, (95), 92 states have internal predecessors, (95), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:02:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-03-18 01:02:26,709 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 93 [2022-03-18 01:02:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:26,709 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-03-18 01:02:26,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-03-18 01:02:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-18 01:02:26,709 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:26,710 INFO L500 BasicCegarLoop]: trace histogram [74, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:26,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-03-18 01:02:26,710 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:26,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1734153250, now seen corresponding path program 74 times [2022-03-18 01:02:26,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:26,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1085302579] [2022-03-18 01:02:26,922 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:26,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1304438904, now seen corresponding path program 1 times [2022-03-18 01:02:26,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:26,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058423973] [2022-03-18 01:02:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:26,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:26,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:26,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:26,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058423973] [2022-03-18 01:02:26,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058423973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:26,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:26,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:02:28,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:28,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1085302579] [2022-03-18 01:02:28,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1085302579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:28,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:28,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-18 01:02:28,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642379459] [2022-03-18 01:02:28,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:28,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-18 01:02:28,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:28,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-18 01:02:28,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 01:02:28,466 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 78 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:32,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:32,151 INFO L93 Difference]: Finished difference Result 199 states and 208 transitions. [2022-03-18 01:02:32,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-18 01:02:32,152 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 78 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2022-03-18 01:02:32,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:32,152 INFO L225 Difference]: With dead ends: 199 [2022-03-18 01:02:32,152 INFO L226 Difference]: Without dead ends: 106 [2022-03-18 01:02:32,154 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=684, Invalid=23186, Unknown=0, NotChecked=0, Total=23870 [2022-03-18 01:02:32,154 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 6540 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 6703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 6540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:32,155 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 6703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 6540 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 01:02:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-18 01:02:32,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-03-18 01:02:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:02:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-03-18 01:02:32,238 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2022-03-18 01:02:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:32,238 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-03-18 01:02:32,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 78 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-03-18 01:02:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-18 01:02:32,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:32,239 INFO L500 BasicCegarLoop]: trace histogram [75, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:32,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-03-18 01:02:32,239 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1123541502, now seen corresponding path program 75 times [2022-03-18 01:02:32,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:32,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2052156907] [2022-03-18 01:02:32,403 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:32,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1363544248, now seen corresponding path program 1 times [2022-03-18 01:02:32,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:32,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261140068] [2022-03-18 01:02:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:32,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:32,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:32,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:32,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261140068] [2022-03-18 01:02:32,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261140068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:32,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:32,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:02:34,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:34,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2052156907] [2022-03-18 01:02:34,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2052156907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:34,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:34,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-18 01:02:34,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661893687] [2022-03-18 01:02:34,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:34,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-18 01:02:34,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:34,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-18 01:02:34,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 01:02:34,908 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 79 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:38,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:38,797 INFO L93 Difference]: Finished difference Result 201 states and 210 transitions. [2022-03-18 01:02:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-18 01:02:38,804 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 79 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 95 [2022-03-18 01:02:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:38,805 INFO L225 Difference]: With dead ends: 201 [2022-03-18 01:02:38,805 INFO L226 Difference]: Without dead ends: 107 [2022-03-18 01:02:38,806 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=693, Invalid=23799, Unknown=0, NotChecked=0, Total=24492 [2022-03-18 01:02:38,806 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 6374 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 6539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 6374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:38,807 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 96 Invalid, 6539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 6374 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 01:02:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-18 01:02:38,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2022-03-18 01:02:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 93 states have (on average 1.043010752688172) internal successors, (97), 94 states have internal predecessors, (97), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:02:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-03-18 01:02:38,876 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 95 [2022-03-18 01:02:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:38,876 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-03-18 01:02:38,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 79 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-03-18 01:02:38,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-18 01:02:38,877 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:38,877 INFO L500 BasicCegarLoop]: trace histogram [76, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:38,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-03-18 01:02:38,877 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:38,877 INFO L85 PathProgramCache]: Analyzing trace with hash 482234402, now seen corresponding path program 76 times [2022-03-18 01:02:38,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:38,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1077801230] [2022-03-18 01:02:38,993 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1422649592, now seen corresponding path program 1 times [2022-03-18 01:02:38,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:38,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072176104] [2022-03-18 01:02:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:38,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:39,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:39,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:39,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072176104] [2022-03-18 01:02:39,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072176104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:39,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:39,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:02:40,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:40,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1077801230] [2022-03-18 01:02:40,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1077801230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:40,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:40,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-18 01:02:40,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711267925] [2022-03-18 01:02:40,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:40,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-18 01:02:40,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:40,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-18 01:02:40,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 01:02:40,744 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 81 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:44,108 INFO L93 Difference]: Finished difference Result 203 states and 212 transitions. [2022-03-18 01:02:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-18 01:02:44,108 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 96 [2022-03-18 01:02:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:44,109 INFO L225 Difference]: With dead ends: 203 [2022-03-18 01:02:44,109 INFO L226 Difference]: Without dead ends: 108 [2022-03-18 01:02:44,110 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=702, Invalid=24420, Unknown=0, NotChecked=0, Total=25122 [2022-03-18 01:02:44,110 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 6504 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 6671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 6504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:44,110 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 6671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 6504 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 01:02:44,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-18 01:02:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2022-03-18 01:02:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:02:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-03-18 01:02:44,181 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2022-03-18 01:02:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:44,181 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-03-18 01:02:44,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-03-18 01:02:44,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 01:02:44,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:44,182 INFO L500 BasicCegarLoop]: trace histogram [77, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:44,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-03-18 01:02:44,182 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:44,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:44,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1278320126, now seen corresponding path program 77 times [2022-03-18 01:02:44,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:44,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1980211621] [2022-03-18 01:02:44,426 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:44,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1481754936, now seen corresponding path program 1 times [2022-03-18 01:02:44,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:44,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162489490] [2022-03-18 01:02:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:44,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:44,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:44,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:44,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162489490] [2022-03-18 01:02:44,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162489490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:44,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:44,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:02:46,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:46,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1980211621] [2022-03-18 01:02:46,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1980211621] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:46,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:46,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-18 01:02:46,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964869208] [2022-03-18 01:02:46,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:46,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-18 01:02:46,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:46,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-18 01:02:46,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 01:02:46,658 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 82 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:51,162 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2022-03-18 01:02:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-18 01:02:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 97 [2022-03-18 01:02:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:51,163 INFO L225 Difference]: With dead ends: 205 [2022-03-18 01:02:51,163 INFO L226 Difference]: Without dead ends: 109 [2022-03-18 01:02:51,165 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=711, Invalid=25049, Unknown=0, NotChecked=0, Total=25760 [2022-03-18 01:02:51,166 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 7197 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 7365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 7197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:51,166 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 276 Invalid, 7365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 7197 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 01:02:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-18 01:02:51,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2022-03-18 01:02:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 96 states have internal predecessors, (99), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:02:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2022-03-18 01:02:51,277 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 97 [2022-03-18 01:02:51,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:51,277 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2022-03-18 01:02:51,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2022-03-18 01:02:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-18 01:02:51,277 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:51,277 INFO L500 BasicCegarLoop]: trace histogram [78, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:51,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-03-18 01:02:51,278 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:51,278 INFO L85 PathProgramCache]: Analyzing trace with hash -20935646, now seen corresponding path program 78 times [2022-03-18 01:02:51,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:51,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113978367] [2022-03-18 01:02:51,432 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:51,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1540860280, now seen corresponding path program 1 times [2022-03-18 01:02:51,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:51,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882280345] [2022-03-18 01:02:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:51,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:51,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:51,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:51,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882280345] [2022-03-18 01:02:51,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882280345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:51,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:51,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:02:54,019 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:02:54,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113978367] [2022-03-18 01:02:54,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113978367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:54,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:54,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-18 01:02:54,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523067758] [2022-03-18 01:02:54,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:02:54,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-18 01:02:54,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:54,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-18 01:02:54,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2022-03-18 01:02:54,021 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 83 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 82 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:02:58,806 INFO L93 Difference]: Finished difference Result 207 states and 216 transitions. [2022-03-18 01:02:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-18 01:02:58,806 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 82 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 98 [2022-03-18 01:02:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:02:58,807 INFO L225 Difference]: With dead ends: 207 [2022-03-18 01:02:58,807 INFO L226 Difference]: Without dead ends: 110 [2022-03-18 01:02:58,809 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=720, Invalid=25686, Unknown=0, NotChecked=0, Total=26406 [2022-03-18 01:02:58,809 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 7722 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 7893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 7722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:02:58,809 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 406 Invalid, 7893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 7722 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 01:02:58,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-18 01:02:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2022-03-18 01:02:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 states have internal predecessors, (100), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:02:58,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-03-18 01:02:58,902 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2022-03-18 01:02:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:02:58,902 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-03-18 01:02:58,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 82 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:02:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-03-18 01:02:58,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 01:02:58,903 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:02:58,903 INFO L500 BasicCegarLoop]: trace histogram [79, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:02:58,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-03-18 01:02:58,903 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:02:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:02:58,903 INFO L85 PathProgramCache]: Analyzing trace with hash 303277570, now seen corresponding path program 79 times [2022-03-18 01:02:58,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:02:58,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [269197647] [2022-03-18 01:02:59,082 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:02:59,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1599965624, now seen corresponding path program 1 times [2022-03-18 01:02:59,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:02:59,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912141763] [2022-03-18 01:02:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:02:59,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:02:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:59,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:02:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:02:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:02:59,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:02:59,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912141763] [2022-03-18 01:02:59,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912141763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:02:59,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:02:59,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:03:01,214 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:01,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [269197647] [2022-03-18 01:03:01,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [269197647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:01,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:01,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-18 01:03:01,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940581644] [2022-03-18 01:03:01,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:01,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-18 01:03:01,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:01,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-18 01:03:01,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 01:03:01,216 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 84 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:05,191 INFO L93 Difference]: Finished difference Result 209 states and 218 transitions. [2022-03-18 01:03:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 01:03:05,191 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 99 [2022-03-18 01:03:05,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:05,192 INFO L225 Difference]: With dead ends: 209 [2022-03-18 01:03:05,192 INFO L226 Difference]: Without dead ends: 111 [2022-03-18 01:03:05,193 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3240 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=729, Invalid=26331, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 01:03:05,193 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 6948 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 7121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 6948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:05,193 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 7121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 6948 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 01:03:05,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-18 01:03:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-03-18 01:03:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 97 states have (on average 1.041237113402062) internal successors, (101), 98 states have internal predecessors, (101), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:03:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2022-03-18 01:03:05,269 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 99 [2022-03-18 01:03:05,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:05,269 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2022-03-18 01:03:05,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2022-03-18 01:03:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-18 01:03:05,270 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:05,270 INFO L500 BasicCegarLoop]: trace histogram [80, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:05,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-03-18 01:03:05,270 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:05,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:05,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1763952674, now seen corresponding path program 80 times [2022-03-18 01:03:05,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:05,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [37873005] [2022-03-18 01:03:05,430 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:03:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1659070968, now seen corresponding path program 1 times [2022-03-18 01:03:05,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:05,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872139311] [2022-03-18 01:03:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:05,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:05,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:05,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:05,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872139311] [2022-03-18 01:03:05,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872139311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:05,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:05,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:03:08,113 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:08,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [37873005] [2022-03-18 01:03:08,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [37873005] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:08,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:08,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-18 01:03:08,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076183534] [2022-03-18 01:03:08,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:08,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-18 01:03:08,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-18 01:03:08,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 01:03:08,115 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 85 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 84 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:12,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:12,491 INFO L93 Difference]: Finished difference Result 211 states and 220 transitions. [2022-03-18 01:03:12,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-18 01:03:12,492 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 84 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 100 [2022-03-18 01:03:12,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:12,493 INFO L225 Difference]: With dead ends: 211 [2022-03-18 01:03:12,493 INFO L226 Difference]: Without dead ends: 112 [2022-03-18 01:03:12,494 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=738, Invalid=26984, Unknown=0, NotChecked=0, Total=27722 [2022-03-18 01:03:12,494 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7058 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 7058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:12,494 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 7233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 7058 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 01:03:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-18 01:03:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2022-03-18 01:03:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 states have internal predecessors, (102), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:03:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-03-18 01:03:12,573 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2022-03-18 01:03:12,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:12,573 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-03-18 01:03:12,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 84 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-03-18 01:03:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 01:03:12,574 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:12,574 INFO L500 BasicCegarLoop]: trace histogram [81, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:12,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-03-18 01:03:12,575 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash -199759358, now seen corresponding path program 81 times [2022-03-18 01:03:12,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:12,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [855632620] [2022-03-18 01:03:12,710 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:03:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1718176312, now seen corresponding path program 1 times [2022-03-18 01:03:12,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:12,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494446308] [2022-03-18 01:03:12,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:12,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:12,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:12,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:12,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494446308] [2022-03-18 01:03:12,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494446308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:12,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:12,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:03:15,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:15,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [855632620] [2022-03-18 01:03:15,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [855632620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:15,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:15,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-18 01:03:15,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664665188] [2022-03-18 01:03:15,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:15,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-18 01:03:15,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:15,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-18 01:03:15,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7059, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 01:03:15,225 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 86 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:20,081 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2022-03-18 01:03:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-18 01:03:20,081 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 101 [2022-03-18 01:03:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:20,082 INFO L225 Difference]: With dead ends: 213 [2022-03-18 01:03:20,082 INFO L226 Difference]: Without dead ends: 113 [2022-03-18 01:03:20,084 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=747, Invalid=27645, Unknown=0, NotChecked=0, Total=28392 [2022-03-18 01:03:20,084 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 8109 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 8285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 8109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:20,084 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 366 Invalid, 8285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 8109 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-18 01:03:20,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-18 01:03:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2022-03-18 01:03:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 100 states have internal predecessors, (103), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:03:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-03-18 01:03:20,171 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 101 [2022-03-18 01:03:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:20,171 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-03-18 01:03:20,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-03-18 01:03:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-18 01:03:20,172 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:20,172 INFO L500 BasicCegarLoop]: trace histogram [82, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:20,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-03-18 01:03:20,172 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:20,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:20,172 INFO L85 PathProgramCache]: Analyzing trace with hash -945290206, now seen corresponding path program 82 times [2022-03-18 01:03:20,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:20,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1076295977] [2022-03-18 01:03:20,320 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:03:20,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1777281656, now seen corresponding path program 1 times [2022-03-18 01:03:20,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:20,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405350600] [2022-03-18 01:03:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:20,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:20,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:20,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:20,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405350600] [2022-03-18 01:03:20,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405350600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:20,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:20,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:03:22,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:22,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1076295977] [2022-03-18 01:03:22,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1076295977] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:22,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:22,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-18 01:03:22,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665750426] [2022-03-18 01:03:22,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:22,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-18 01:03:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-18 01:03:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=7228, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 01:03:22,330 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:26,126 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2022-03-18 01:03:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-18 01:03:26,126 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 102 [2022-03-18 01:03:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:26,127 INFO L225 Difference]: With dead ends: 215 [2022-03-18 01:03:26,127 INFO L226 Difference]: Without dead ends: 114 [2022-03-18 01:03:26,128 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=756, Invalid=28314, Unknown=0, NotChecked=0, Total=29070 [2022-03-18 01:03:26,128 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7775 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 7953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 7775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:26,129 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 186 Invalid, 7953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 7775 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 01:03:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-18 01:03:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2022-03-18 01:03:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 100 states have (on average 1.04) internal successors, (104), 101 states have internal predecessors, (104), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:03:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-03-18 01:03:26,209 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 102 [2022-03-18 01:03:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:26,210 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-03-18 01:03:26,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-03-18 01:03:26,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 01:03:26,210 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:26,210 INFO L500 BasicCegarLoop]: trace histogram [83, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:26,210 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-03-18 01:03:26,210 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:26,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1713057282, now seen corresponding path program 83 times [2022-03-18 01:03:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:26,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [669115857] [2022-03-18 01:03:26,379 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:03:26,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1836387000, now seen corresponding path program 1 times [2022-03-18 01:03:26,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:26,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16721016] [2022-03-18 01:03:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:26,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:26,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:26,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:26,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16721016] [2022-03-18 01:03:26,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16721016] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:26,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:26,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:03:29,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:29,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [669115857] [2022-03-18 01:03:29,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [669115857] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:29,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:29,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-18 01:03:29,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037745736] [2022-03-18 01:03:29,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:29,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-18 01:03:29,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-18 01:03:29,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 01:03:29,255 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 88 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:34,009 INFO L93 Difference]: Finished difference Result 217 states and 226 transitions. [2022-03-18 01:03:34,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-18 01:03:34,009 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 103 [2022-03-18 01:03:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:34,010 INFO L225 Difference]: With dead ends: 217 [2022-03-18 01:03:34,010 INFO L226 Difference]: Without dead ends: 115 [2022-03-18 01:03:34,011 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3570 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=765, Invalid=28991, Unknown=0, NotChecked=0, Total=29756 [2022-03-18 01:03:34,011 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 8030 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 8211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 8030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:34,011 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 216 Invalid, 8211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 8030 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 01:03:34,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-18 01:03:34,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2022-03-18 01:03:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 102 states have internal predecessors, (105), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:03:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-03-18 01:03:34,095 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 103 [2022-03-18 01:03:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:34,095 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-03-18 01:03:34,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-03-18 01:03:34,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 01:03:34,096 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:34,096 INFO L500 BasicCegarLoop]: trace histogram [84, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:34,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-03-18 01:03:34,096 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:34,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:34,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1777516510, now seen corresponding path program 84 times [2022-03-18 01:03:34,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:34,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [803163929] [2022-03-18 01:03:34,347 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:03:34,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1895492344, now seen corresponding path program 1 times [2022-03-18 01:03:34,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:34,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805290152] [2022-03-18 01:03:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:34,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:34,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:34,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:34,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805290152] [2022-03-18 01:03:34,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805290152] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:34,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:34,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:03:36,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:36,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [803163929] [2022-03-18 01:03:36,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [803163929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:36,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:36,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-18 01:03:36,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004220592] [2022-03-18 01:03:36,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:36,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-18 01:03:36,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:36,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-18 01:03:36,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=7572, Unknown=0, NotChecked=0, Total=7832 [2022-03-18 01:03:36,719 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 89 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:42,047 INFO L93 Difference]: Finished difference Result 219 states and 228 transitions. [2022-03-18 01:03:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-18 01:03:42,048 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 104 [2022-03-18 01:03:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:42,049 INFO L225 Difference]: With dead ends: 219 [2022-03-18 01:03:42,049 INFO L226 Difference]: Without dead ends: 116 [2022-03-18 01:03:42,050 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=774, Invalid=29676, Unknown=0, NotChecked=0, Total=30450 [2022-03-18 01:03:42,050 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 8092 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 8275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 8092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:42,050 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 176 Invalid, 8275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 8092 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-18 01:03:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-18 01:03:42,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2022-03-18 01:03:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 103 states have internal predecessors, (106), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:03:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-03-18 01:03:42,139 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 104 [2022-03-18 01:03:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:42,139 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-03-18 01:03:42,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-03-18 01:03:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 01:03:42,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:42,150 INFO L500 BasicCegarLoop]: trace histogram [85, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:42,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-03-18 01:03:42,154 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:42,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1683845634, now seen corresponding path program 85 times [2022-03-18 01:03:42,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:42,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2069239157] [2022-03-18 01:03:42,419 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:03:42,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1954597688, now seen corresponding path program 1 times [2022-03-18 01:03:42,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:42,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019984642] [2022-03-18 01:03:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:42,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:42,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:42,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:42,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019984642] [2022-03-18 01:03:42,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019984642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:42,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:42,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:03:45,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:45,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2069239157] [2022-03-18 01:03:45,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2069239157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:45,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:45,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-18 01:03:45,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215042966] [2022-03-18 01:03:45,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:45,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-18 01:03:45,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:45,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-18 01:03:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=7747, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 01:03:45,362 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 90 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:50,943 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2022-03-18 01:03:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-18 01:03:50,944 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 105 [2022-03-18 01:03:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:50,944 INFO L225 Difference]: With dead ends: 221 [2022-03-18 01:03:50,945 INFO L226 Difference]: Without dead ends: 117 [2022-03-18 01:03:50,946 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=783, Invalid=30369, Unknown=0, NotChecked=0, Total=31152 [2022-03-18 01:03:50,946 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 8913 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 9097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 8913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:50,946 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 406 Invalid, 9097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 8913 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-18 01:03:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-18 01:03:51,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2022-03-18 01:03:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 104 states have internal predecessors, (107), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:03:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-03-18 01:03:51,055 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 105 [2022-03-18 01:03:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:51,055 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-03-18 01:03:51,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-03-18 01:03:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-18 01:03:51,056 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:51,056 INFO L500 BasicCegarLoop]: trace histogram [86, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:51,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-03-18 01:03:51,056 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:51,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:51,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1611889698, now seen corresponding path program 86 times [2022-03-18 01:03:51,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:51,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970232927] [2022-03-18 01:03:51,340 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:03:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2013703032, now seen corresponding path program 1 times [2022-03-18 01:03:51,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:51,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595325403] [2022-03-18 01:03:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:51,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:51,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:51,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:51,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595325403] [2022-03-18 01:03:51,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595325403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:51,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:51,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:03:54,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:03:54,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970232927] [2022-03-18 01:03:54,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970232927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:54,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:54,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-18 01:03:54,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962164712] [2022-03-18 01:03:54,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:03:54,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-18 01:03:54,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:54,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-18 01:03:54,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=7924, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 01:03:54,501 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 91 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:59,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:03:59,549 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2022-03-18 01:03:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-18 01:03:59,549 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 106 [2022-03-18 01:03:59,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:03:59,550 INFO L225 Difference]: With dead ends: 223 [2022-03-18 01:03:59,550 INFO L226 Difference]: Without dead ends: 118 [2022-03-18 01:03:59,577 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=792, Invalid=31070, Unknown=0, NotChecked=0, Total=31862 [2022-03-18 01:03:59,577 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 8447 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 8633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 8447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:03:59,577 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 176 Invalid, 8633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 8447 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 01:03:59,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-18 01:03:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2022-03-18 01:03:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 105 states have internal predecessors, (108), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:03:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-03-18 01:03:59,695 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 106 [2022-03-18 01:03:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:03:59,695 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-03-18 01:03:59,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:03:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-03-18 01:03:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 01:03:59,709 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:03:59,709 INFO L500 BasicCegarLoop]: trace histogram [87, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:03:59,709 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-03-18 01:03:59,709 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:03:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:03:59,709 INFO L85 PathProgramCache]: Analyzing trace with hash -618744318, now seen corresponding path program 87 times [2022-03-18 01:03:59,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:03:59,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [466220212] [2022-03-18 01:03:59,849 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:03:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2072808376, now seen corresponding path program 1 times [2022-03-18 01:03:59,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:03:59,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70974123] [2022-03-18 01:03:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:03:59,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:03:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:59,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:03:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:03:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:03:59,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:03:59,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70974123] [2022-03-18 01:03:59,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70974123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:03:59,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:03:59,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:04:02,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:02,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [466220212] [2022-03-18 01:04:02,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [466220212] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:02,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:02,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-18 01:04:02,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078093378] [2022-03-18 01:04:02,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:02,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-18 01:04:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:02,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-18 01:04:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=8103, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 01:04:02,206 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 92 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:07,484 INFO L93 Difference]: Finished difference Result 225 states and 234 transitions. [2022-03-18 01:04:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-18 01:04:07,486 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 107 [2022-03-18 01:04:07,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:07,486 INFO L225 Difference]: With dead ends: 225 [2022-03-18 01:04:07,486 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 01:04:07,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3916 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=801, Invalid=31779, Unknown=0, NotChecked=0, Total=32580 [2022-03-18 01:04:07,489 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 9425 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 9613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 9425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:07,489 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 461 Invalid, 9613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 9425 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-18 01:04:07,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 01:04:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2022-03-18 01:04:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 106 states have internal predecessors, (109), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:04:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-03-18 01:04:07,591 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 107 [2022-03-18 01:04:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:07,591 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-03-18 01:04:07,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-03-18 01:04:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-18 01:04:07,592 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:07,592 INFO L500 BasicCegarLoop]: trace histogram [88, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:07,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-03-18 01:04:07,592 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:07,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1048922078, now seen corresponding path program 88 times [2022-03-18 01:04:07,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:07,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [432606251] [2022-03-18 01:04:07,741 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:04:07,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2131913720, now seen corresponding path program 1 times [2022-03-18 01:04:07,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:07,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429524692] [2022-03-18 01:04:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:07,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:07,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:07,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:07,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429524692] [2022-03-18 01:04:07,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429524692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:07,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:07,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:04:09,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:09,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [432606251] [2022-03-18 01:04:09,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [432606251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:09,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:09,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-18 01:04:09,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464967549] [2022-03-18 01:04:09,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:09,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-18 01:04:09,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:09,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-18 01:04:09,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=8284, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 01:04:09,932 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:14,573 INFO L93 Difference]: Finished difference Result 227 states and 236 transitions. [2022-03-18 01:04:14,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-18 01:04:14,578 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 108 [2022-03-18 01:04:14,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:14,579 INFO L225 Difference]: With dead ends: 227 [2022-03-18 01:04:14,579 INFO L226 Difference]: Without dead ends: 120 [2022-03-18 01:04:14,580 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=810, Invalid=32496, Unknown=0, NotChecked=0, Total=33306 [2022-03-18 01:04:14,580 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 8878 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 9069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 8878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:14,581 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 201 Invalid, 9069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 8878 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 01:04:14,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-18 01:04:14,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2022-03-18 01:04:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 107 states have internal predecessors, (110), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:04:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-03-18 01:04:14,674 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 108 [2022-03-18 01:04:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:14,674 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-03-18 01:04:14,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-03-18 01:04:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 01:04:14,675 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:14,675 INFO L500 BasicCegarLoop]: trace histogram [89, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:14,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-03-18 01:04:14,675 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:14,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:14,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1499530750, now seen corresponding path program 89 times [2022-03-18 01:04:14,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:14,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [260439521] [2022-03-18 01:04:14,945 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:04:14,945 INFO L85 PathProgramCache]: Analyzing trace with hash -2103948232, now seen corresponding path program 1 times [2022-03-18 01:04:14,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:14,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487332327] [2022-03-18 01:04:14,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:14,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:14,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:14,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:14,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487332327] [2022-03-18 01:04:14,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487332327] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:14,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:14,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:04:17,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:17,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [260439521] [2022-03-18 01:04:17,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [260439521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:17,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:17,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-18 01:04:17,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757181673] [2022-03-18 01:04:17,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:17,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-18 01:04:17,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:17,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-18 01:04:17,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=8467, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 01:04:17,503 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:22,317 INFO L93 Difference]: Finished difference Result 229 states and 238 transitions. [2022-03-18 01:04:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-18 01:04:22,318 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 109 [2022-03-18 01:04:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:22,318 INFO L225 Difference]: With dead ends: 229 [2022-03-18 01:04:22,318 INFO L226 Difference]: Without dead ends: 121 [2022-03-18 01:04:22,319 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=819, Invalid=33221, Unknown=0, NotChecked=0, Total=34040 [2022-03-18 01:04:22,320 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 9665 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 9857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 9665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:22,320 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 416 Invalid, 9857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 9665 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 01:04:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-18 01:04:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2022-03-18 01:04:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 108 states have internal predecessors, (111), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:04:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2022-03-18 01:04:22,413 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 109 [2022-03-18 01:04:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:22,414 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2022-03-18 01:04:22,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2022-03-18 01:04:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 01:04:22,414 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:22,414 INFO L500 BasicCegarLoop]: trace histogram [90, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:22,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-03-18 01:04:22,414 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:22,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:22,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1711469602, now seen corresponding path program 90 times [2022-03-18 01:04:22,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:22,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1903037052] [2022-03-18 01:04:22,532 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:04:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2044842888, now seen corresponding path program 1 times [2022-03-18 01:04:22,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:22,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665192570] [2022-03-18 01:04:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:22,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:22,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:22,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:22,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665192570] [2022-03-18 01:04:22,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665192570] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:22,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:22,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:04:25,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:25,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1903037052] [2022-03-18 01:04:25,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1903037052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:25,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:25,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-18 01:04:25,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823441932] [2022-03-18 01:04:25,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:25,196 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-18 01:04:25,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:25,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-18 01:04:25,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=8652, Unknown=0, NotChecked=0, Total=8930 [2022-03-18 01:04:25,197 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 95 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 94 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:30,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:30,063 INFO L93 Difference]: Finished difference Result 231 states and 240 transitions. [2022-03-18 01:04:30,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-18 01:04:30,064 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 94 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 110 [2022-03-18 01:04:30,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:30,065 INFO L225 Difference]: With dead ends: 231 [2022-03-18 01:04:30,065 INFO L226 Difference]: Without dead ends: 122 [2022-03-18 01:04:30,066 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4186 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=828, Invalid=33954, Unknown=0, NotChecked=0, Total=34782 [2022-03-18 01:04:30,066 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 9277 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 9471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 9277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:30,067 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 9471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 9277 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 01:04:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-18 01:04:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2022-03-18 01:04:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 108 states have (on average 1.037037037037037) internal successors, (112), 109 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:04:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-03-18 01:04:30,222 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 110 [2022-03-18 01:04:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:30,223 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-03-18 01:04:30,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 94 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-03-18 01:04:30,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-18 01:04:30,223 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:30,223 INFO L500 BasicCegarLoop]: trace histogram [91, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:30,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-03-18 01:04:30,224 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1826734590, now seen corresponding path program 91 times [2022-03-18 01:04:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:30,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1240673802] [2022-03-18 01:04:30,475 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:04:30,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1985737544, now seen corresponding path program 1 times [2022-03-18 01:04:30,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:30,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047561953] [2022-03-18 01:04:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:30,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:30,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:30,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047561953] [2022-03-18 01:04:30,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047561953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:30,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:30,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:04:33,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:33,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1240673802] [2022-03-18 01:04:33,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1240673802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:33,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:33,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-18 01:04:33,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278846775] [2022-03-18 01:04:33,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:33,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-18 01:04:33,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:33,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-18 01:04:33,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8839, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 01:04:33,674 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:40,198 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2022-03-18 01:04:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-18 01:04:40,198 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 111 [2022-03-18 01:04:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:40,199 INFO L225 Difference]: With dead ends: 233 [2022-03-18 01:04:40,199 INFO L226 Difference]: Without dead ends: 123 [2022-03-18 01:04:40,200 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4278 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=837, Invalid=34695, Unknown=0, NotChecked=0, Total=35532 [2022-03-18 01:04:40,201 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 9605 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 9801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 9605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:40,201 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 261 Invalid, 9801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 9605 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-18 01:04:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-18 01:04:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2022-03-18 01:04:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 109 states have (on average 1.036697247706422) internal successors, (113), 110 states have internal predecessors, (113), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:04:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-03-18 01:04:40,298 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 111 [2022-03-18 01:04:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:40,298 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-03-18 01:04:40,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:40,299 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-03-18 01:04:40,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-18 01:04:40,299 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:40,299 INFO L500 BasicCegarLoop]: trace histogram [92, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:40,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-03-18 01:04:40,299 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:40,299 INFO L85 PathProgramCache]: Analyzing trace with hash 158085154, now seen corresponding path program 92 times [2022-03-18 01:04:40,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:40,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752473327] [2022-03-18 01:04:40,556 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:04:40,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1926632200, now seen corresponding path program 1 times [2022-03-18 01:04:40,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:40,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117558524] [2022-03-18 01:04:40,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:40,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:40,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:40,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117558524] [2022-03-18 01:04:40,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117558524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:40,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:40,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:04:43,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:43,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752473327] [2022-03-18 01:04:43,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752473327] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:43,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:43,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-18 01:04:43,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945238388] [2022-03-18 01:04:43,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:43,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-18 01:04:43,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:43,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-18 01:04:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=9028, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 01:04:43,182 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 96 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:49,611 INFO L93 Difference]: Finished difference Result 235 states and 244 transitions. [2022-03-18 01:04:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-18 01:04:49,612 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 96 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 112 [2022-03-18 01:04:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:49,612 INFO L225 Difference]: With dead ends: 235 [2022-03-18 01:04:49,612 INFO L226 Difference]: Without dead ends: 124 [2022-03-18 01:04:49,614 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=846, Invalid=35444, Unknown=0, NotChecked=0, Total=36290 [2022-03-18 01:04:49,614 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 10201 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 10399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 10201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:49,614 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 406 Invalid, 10399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 10201 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-18 01:04:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-18 01:04:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2022-03-18 01:04:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 111 states have internal predecessors, (114), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:04:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2022-03-18 01:04:49,714 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 112 [2022-03-18 01:04:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:49,714 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2022-03-18 01:04:49,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 96 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2022-03-18 01:04:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 01:04:49,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:49,715 INFO L500 BasicCegarLoop]: trace histogram [93, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:49,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-03-18 01:04:49,715 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:49,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1557955074, now seen corresponding path program 93 times [2022-03-18 01:04:49,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:49,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1354085818] [2022-03-18 01:04:49,834 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:04:49,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1867526856, now seen corresponding path program 1 times [2022-03-18 01:04:49,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:49,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898031155] [2022-03-18 01:04:49,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:49,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:49,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:49,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:49,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898031155] [2022-03-18 01:04:49,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898031155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:49,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:49,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:04:52,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:04:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1354085818] [2022-03-18 01:04:52,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1354085818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:52,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:52,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-18 01:04:52,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886120896] [2022-03-18 01:04:52,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:04:52,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-18 01:04:52,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:52,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-18 01:04:52,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=9219, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 01:04:52,868 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:04:58,472 INFO L93 Difference]: Finished difference Result 237 states and 246 transitions. [2022-03-18 01:04:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-18 01:04:58,473 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 113 [2022-03-18 01:04:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:04:58,474 INFO L225 Difference]: With dead ends: 237 [2022-03-18 01:04:58,474 INFO L226 Difference]: Without dead ends: 125 [2022-03-18 01:04:58,475 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=855, Invalid=36201, Unknown=0, NotChecked=0, Total=37056 [2022-03-18 01:04:58,475 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 9846 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 10047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 9846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:04:58,475 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 10047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 9846 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-18 01:04:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-18 01:04:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2022-03-18 01:04:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 112 states have internal predecessors, (115), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:04:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-03-18 01:04:58,582 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 113 [2022-03-18 01:04:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:04:58,582 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-03-18 01:04:58,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:04:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-03-18 01:04:58,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-18 01:04:58,583 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:04:58,583 INFO L500 BasicCegarLoop]: trace histogram [94, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:04:58,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-03-18 01:04:58,583 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:04:58,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:04:58,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2004249634, now seen corresponding path program 94 times [2022-03-18 01:04:58,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:04:58,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1393385779] [2022-03-18 01:04:58,748 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:04:58,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1808421512, now seen corresponding path program 1 times [2022-03-18 01:04:58,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:04:58,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041441301] [2022-03-18 01:04:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:04:58,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:04:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:58,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:04:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:04:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:04:58,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:04:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041441301] [2022-03-18 01:04:58,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041441301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:04:58,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:04:58,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:05:01,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:05:01,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1393385779] [2022-03-18 01:05:01,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1393385779] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:01,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:01,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-18 01:05:01,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725560383] [2022-03-18 01:05:01,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:05:01,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-18 01:05:01,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:01,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-18 01:05:01,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=9412, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 01:05:01,762 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 99 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:05:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:05:07,801 INFO L93 Difference]: Finished difference Result 239 states and 248 transitions. [2022-03-18 01:05:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-18 01:05:07,802 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 114 [2022-03-18 01:05:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:05:07,802 INFO L225 Difference]: With dead ends: 239 [2022-03-18 01:05:07,802 INFO L226 Difference]: Without dead ends: 126 [2022-03-18 01:05:07,804 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4560 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=864, Invalid=36966, Unknown=0, NotChecked=0, Total=37830 [2022-03-18 01:05:07,804 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9592 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 9592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:05:07,804 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 9795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 9592 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-18 01:05:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-18 01:05:07,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2022-03-18 01:05:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 113 states have internal predecessors, (116), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:05:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-03-18 01:05:07,921 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 114 [2022-03-18 01:05:07,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:05:07,921 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-03-18 01:05:07,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:05:07,921 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-03-18 01:05:07,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 01:05:07,922 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:05:07,922 INFO L500 BasicCegarLoop]: trace histogram [95, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:05:07,922 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-03-18 01:05:07,922 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:05:07,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:05:07,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1340488190, now seen corresponding path program 95 times [2022-03-18 01:05:07,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:07,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [630035850] [2022-03-18 01:05:08,097 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:05:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1749316168, now seen corresponding path program 1 times [2022-03-18 01:05:08,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:08,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137361696] [2022-03-18 01:05:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:08,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:08,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:05:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:08,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:05:08,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137361696] [2022-03-18 01:05:08,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137361696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:08,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:08,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:05:12,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:05:12,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [630035850] [2022-03-18 01:05:12,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [630035850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:12,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:12,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-18 01:05:12,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576421530] [2022-03-18 01:05:12,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:05:12,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-18 01:05:12,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:12,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-18 01:05:12,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=9607, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 01:05:12,002 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 100 states, 100 states have (on average 1.08) internal successors, (108), 99 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:05:18,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:05:18,843 INFO L93 Difference]: Finished difference Result 241 states and 250 transitions. [2022-03-18 01:05:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-18 01:05:18,843 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.08) internal successors, (108), 99 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 115 [2022-03-18 01:05:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:05:18,844 INFO L225 Difference]: With dead ends: 241 [2022-03-18 01:05:18,844 INFO L226 Difference]: Without dead ends: 127 [2022-03-18 01:05:18,861 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4656 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=873, Invalid=37739, Unknown=0, NotChecked=0, Total=38612 [2022-03-18 01:05:18,861 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9788 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 9788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:05:18,861 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 9993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 9788 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-18 01:05:18,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-18 01:05:18,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2022-03-18 01:05:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 114 states have internal predecessors, (117), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:05:18,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-03-18 01:05:18,969 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 115 [2022-03-18 01:05:18,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:05:18,969 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-03-18 01:05:18,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.08) internal successors, (108), 99 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:05:18,969 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-03-18 01:05:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 01:05:18,969 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:05:18,969 INFO L500 BasicCegarLoop]: trace histogram [96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:05:18,969 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-03-18 01:05:18,970 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:05:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:05:18,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1948145630, now seen corresponding path program 96 times [2022-03-18 01:05:18,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:18,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1591834077] [2022-03-18 01:05:19,170 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:05:19,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1690210824, now seen corresponding path program 1 times [2022-03-18 01:05:19,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:19,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72704696] [2022-03-18 01:05:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:19,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:19,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:05:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:19,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:05:19,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72704696] [2022-03-18 01:05:19,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72704696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:19,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:19,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:05:22,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:05:22,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1591834077] [2022-03-18 01:05:22,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1591834077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:22,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:22,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-18 01:05:22,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194606753] [2022-03-18 01:05:22,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:05:22,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-18 01:05:22,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:22,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-18 01:05:22,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=9804, Unknown=0, NotChecked=0, Total=10100 [2022-03-18 01:05:22,051 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:05:28,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:05:28,753 INFO L93 Difference]: Finished difference Result 243 states and 252 transitions. [2022-03-18 01:05:28,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-18 01:05:28,754 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 116 [2022-03-18 01:05:28,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:05:28,755 INFO L225 Difference]: With dead ends: 243 [2022-03-18 01:05:28,755 INFO L226 Difference]: Without dead ends: 128 [2022-03-18 01:05:28,757 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4753 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=882, Invalid=38520, Unknown=0, NotChecked=0, Total=39402 [2022-03-18 01:05:28,757 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 10729 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 10935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 10729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:05:28,757 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 316 Invalid, 10935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 10729 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-18 01:05:28,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-18 01:05:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-03-18 01:05:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 115 states have internal predecessors, (118), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:05:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-03-18 01:05:28,881 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 116 [2022-03-18 01:05:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:05:28,881 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-03-18 01:05:28,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:05:28,881 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-03-18 01:05:28,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 01:05:28,881 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:05:28,881 INFO L500 BasicCegarLoop]: trace histogram [97, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:05:28,881 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-03-18 01:05:28,882 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:05:28,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:05:28,882 INFO L85 PathProgramCache]: Analyzing trace with hash 689310210, now seen corresponding path program 97 times [2022-03-18 01:05:28,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:28,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [923175655] [2022-03-18 01:05:29,079 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:05:29,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1631105480, now seen corresponding path program 1 times [2022-03-18 01:05:29,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:29,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457629670] [2022-03-18 01:05:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:29,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:29,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:05:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:29,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:05:29,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457629670] [2022-03-18 01:05:29,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457629670] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:29,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:29,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:05:32,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:05:32,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [923175655] [2022-03-18 01:05:32,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [923175655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:32,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:32,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-18 01:05:32,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372250180] [2022-03-18 01:05:32,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:05:32,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-18 01:05:32,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:32,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-18 01:05:32,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=10003, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 01:05:32,398 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 102 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:05:38,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:05:38,736 INFO L93 Difference]: Finished difference Result 245 states and 254 transitions. [2022-03-18 01:05:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-18 01:05:38,736 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 117 [2022-03-18 01:05:38,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:05:38,737 INFO L225 Difference]: With dead ends: 245 [2022-03-18 01:05:38,737 INFO L226 Difference]: Without dead ends: 129 [2022-03-18 01:05:38,740 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=891, Invalid=39309, Unknown=0, NotChecked=0, Total=40200 [2022-03-18 01:05:38,740 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 10438 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 10647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 10438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:05:38,740 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 141 Invalid, 10647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 10438 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-18 01:05:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-18 01:05:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-03-18 01:05:38,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 116 states have internal predecessors, (119), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:05:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-03-18 01:05:38,862 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 117 [2022-03-18 01:05:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:05:38,862 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-03-18 01:05:38,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:05:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-03-18 01:05:38,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-18 01:05:38,863 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:05:38,863 INFO L500 BasicCegarLoop]: trace histogram [98, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:05:38,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-03-18 01:05:38,863 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:05:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:05:38,863 INFO L85 PathProgramCache]: Analyzing trace with hash 846062626, now seen corresponding path program 98 times [2022-03-18 01:05:38,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:38,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1493707319] [2022-03-18 01:05:39,075 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:05:39,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1572000136, now seen corresponding path program 1 times [2022-03-18 01:05:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:39,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738917038] [2022-03-18 01:05:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:39,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:39,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:05:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:39,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:05:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738917038] [2022-03-18 01:05:39,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738917038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:39,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:39,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:05:43,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:05:43,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1493707319] [2022-03-18 01:05:43,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1493707319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:43,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:43,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-18 01:05:43,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625694161] [2022-03-18 01:05:43,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:05:43,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-18 01:05:43,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:43,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-18 01:05:43,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=10204, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 01:05:43,154 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 103 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 102 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:05:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:05:49,870 INFO L93 Difference]: Finished difference Result 247 states and 256 transitions. [2022-03-18 01:05:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-18 01:05:49,870 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 102 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2022-03-18 01:05:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:05:49,871 INFO L225 Difference]: With dead ends: 247 [2022-03-18 01:05:49,871 INFO L226 Difference]: Without dead ends: 130 [2022-03-18 01:05:49,873 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4950 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=900, Invalid=40106, Unknown=0, NotChecked=0, Total=41006 [2022-03-18 01:05:49,873 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 10822 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 11033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 10822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:05:49,874 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 206 Invalid, 11033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 10822 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-18 01:05:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-18 01:05:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-03-18 01:05:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 117 states have internal predecessors, (120), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:05:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-03-18 01:05:49,993 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 118 [2022-03-18 01:05:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:05:49,993 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-03-18 01:05:49,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 102 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:05:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-03-18 01:05:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-18 01:05:49,994 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:05:49,994 INFO L500 BasicCegarLoop]: trace histogram [99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:05:49,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-03-18 01:05:49,994 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:05:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:05:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1410420226, now seen corresponding path program 99 times [2022-03-18 01:05:49,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:49,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [759720339] [2022-03-18 01:05:50,216 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:05:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1512894792, now seen corresponding path program 1 times [2022-03-18 01:05:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:05:50,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745353186] [2022-03-18 01:05:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:05:50,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:05:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:50,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:05:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:05:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:05:50,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:05:50,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745353186] [2022-03-18 01:05:50,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745353186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:50,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:50,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:05:53,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:05:53,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [759720339] [2022-03-18 01:05:53,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [759720339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:05:53,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:05:53,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-03-18 01:05:53,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191225604] [2022-03-18 01:05:53,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:05:53,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-18 01:05:53,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:05:53,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-18 01:05:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=10407, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 01:05:53,555 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:06:00,671 INFO L93 Difference]: Finished difference Result 249 states and 258 transitions. [2022-03-18 01:06:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-18 01:06:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 119 [2022-03-18 01:06:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:06:00,672 INFO L225 Difference]: With dead ends: 249 [2022-03-18 01:06:00,672 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 01:06:00,674 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5050 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=909, Invalid=40911, Unknown=0, NotChecked=0, Total=41820 [2022-03-18 01:06:00,675 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 11741 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 11953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 11741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:06:00,675 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 461 Invalid, 11953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 11741 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-18 01:06:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 01:06:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2022-03-18 01:06:00,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 118 states have internal predecessors, (121), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:06:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-03-18 01:06:00,805 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 119 [2022-03-18 01:06:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:06:00,806 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-03-18 01:06:00,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:00,806 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-03-18 01:06:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-18 01:06:00,806 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:06:00,806 INFO L500 BasicCegarLoop]: trace histogram [100, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:06:00,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-03-18 01:06:00,806 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:06:00,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:06:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1725636642, now seen corresponding path program 100 times [2022-03-18 01:06:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:00,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [390359754] [2022-03-18 01:06:00,998 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:06:00,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1453789448, now seen corresponding path program 1 times [2022-03-18 01:06:00,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:00,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047596748] [2022-03-18 01:06:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:00,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:01,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:06:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:01,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:06:01,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047596748] [2022-03-18 01:06:01,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047596748] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:01,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:01,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:06:04,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:06:04,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [390359754] [2022-03-18 01:06:04,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [390359754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:04,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:04,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-03-18 01:06:04,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094482927] [2022-03-18 01:06:04,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:06:04,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-18 01:06:04,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:04,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-18 01:06:04,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=10612, Unknown=0, NotChecked=0, Total=10920 [2022-03-18 01:06:04,361 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 105 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 104 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:10,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:06:10,920 INFO L93 Difference]: Finished difference Result 251 states and 260 transitions. [2022-03-18 01:06:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-18 01:06:10,921 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 104 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 120 [2022-03-18 01:06:10,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:06:10,921 INFO L225 Difference]: With dead ends: 251 [2022-03-18 01:06:10,921 INFO L226 Difference]: Without dead ends: 132 [2022-03-18 01:06:10,924 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5151 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=918, Invalid=41724, Unknown=0, NotChecked=0, Total=42642 [2022-03-18 01:06:10,924 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10798 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 11013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 10798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:06:10,924 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 11013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 10798 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-18 01:06:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-18 01:06:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2022-03-18 01:06:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 119 states have internal predecessors, (122), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:06:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-03-18 01:06:11,044 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 120 [2022-03-18 01:06:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:06:11,044 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-03-18 01:06:11,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 104 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-03-18 01:06:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 01:06:11,051 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:06:11,052 INFO L500 BasicCegarLoop]: trace histogram [101, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:06:11,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-03-18 01:06:11,052 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:06:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:06:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1387556350, now seen corresponding path program 101 times [2022-03-18 01:06:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:11,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1173852974] [2022-03-18 01:06:11,233 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:06:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1394684104, now seen corresponding path program 1 times [2022-03-18 01:06:11,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:11,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028767069] [2022-03-18 01:06:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:11,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:06:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:11,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:06:11,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028767069] [2022-03-18 01:06:11,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028767069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:11,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:11,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:06:15,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:06:15,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1173852974] [2022-03-18 01:06:15,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1173852974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:15,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:15,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-03-18 01:06:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678813153] [2022-03-18 01:06:15,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:06:15,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-18 01:06:15,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:15,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-18 01:06:15,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=10819, Unknown=0, NotChecked=0, Total=11130 [2022-03-18 01:06:15,333 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 106 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:22,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:06:22,653 INFO L93 Difference]: Finished difference Result 253 states and 262 transitions. [2022-03-18 01:06:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-18 01:06:22,653 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 121 [2022-03-18 01:06:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:06:22,654 INFO L225 Difference]: With dead ends: 253 [2022-03-18 01:06:22,654 INFO L226 Difference]: Without dead ends: 133 [2022-03-18 01:06:22,656 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5253 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=927, Invalid=42545, Unknown=0, NotChecked=0, Total=43472 [2022-03-18 01:06:22,656 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 11398 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 11615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 11398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:06:22,656 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 191 Invalid, 11615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 11398 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-18 01:06:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-18 01:06:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2022-03-18 01:06:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 120 states have internal predecessors, (123), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:06:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2022-03-18 01:06:22,774 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 121 [2022-03-18 01:06:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:06:22,774 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2022-03-18 01:06:22,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2022-03-18 01:06:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-18 01:06:22,774 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:06:22,774 INFO L500 BasicCegarLoop]: trace histogram [102, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:06:22,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-03-18 01:06:22,775 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:06:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:06:22,775 INFO L85 PathProgramCache]: Analyzing trace with hash 887708706, now seen corresponding path program 102 times [2022-03-18 01:06:22,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:22,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926930483] [2022-03-18 01:06:22,936 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:06:22,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1335578760, now seen corresponding path program 1 times [2022-03-18 01:06:22,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:22,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999021562] [2022-03-18 01:06:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:22,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:22,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:06:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:22,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:06:22,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999021562] [2022-03-18 01:06:22,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999021562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:22,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:22,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:06:26,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:06:26,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926930483] [2022-03-18 01:06:26,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926930483] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:26,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:26,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-03-18 01:06:26,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118382033] [2022-03-18 01:06:26,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:06:26,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-03-18 01:06:26,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:26,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-03-18 01:06:26,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=11028, Unknown=0, NotChecked=0, Total=11342 [2022-03-18 01:06:26,717 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:06:34,201 INFO L93 Difference]: Finished difference Result 255 states and 264 transitions. [2022-03-18 01:06:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-18 01:06:34,201 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 122 [2022-03-18 01:06:34,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:06:34,202 INFO L225 Difference]: With dead ends: 255 [2022-03-18 01:06:34,202 INFO L226 Difference]: Without dead ends: 134 [2022-03-18 01:06:34,204 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5356 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=936, Invalid=43374, Unknown=0, NotChecked=0, Total=44310 [2022-03-18 01:06:34,204 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 12112 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 12331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 12112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:06:34,204 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 371 Invalid, 12331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 12112 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-18 01:06:34,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-18 01:06:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2022-03-18 01:06:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 121 states have internal predecessors, (124), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:06:34,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-03-18 01:06:34,331 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 122 [2022-03-18 01:06:34,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:06:34,331 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-03-18 01:06:34,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:34,331 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-03-18 01:06:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-18 01:06:34,332 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:06:34,332 INFO L500 BasicCegarLoop]: trace histogram [103, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:06:34,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-03-18 01:06:34,332 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:06:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:06:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1593518590, now seen corresponding path program 103 times [2022-03-18 01:06:34,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:34,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1029728804] [2022-03-18 01:06:34,589 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:06:34,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1276473416, now seen corresponding path program 1 times [2022-03-18 01:06:34,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:34,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715318029] [2022-03-18 01:06:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:34,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:34,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:06:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:34,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:06:34,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715318029] [2022-03-18 01:06:34,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715318029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:34,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:34,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:06:38,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:06:38,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1029728804] [2022-03-18 01:06:38,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1029728804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:38,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:38,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-03-18 01:06:38,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489507897] [2022-03-18 01:06:38,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:06:38,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-18 01:06:38,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:38,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-18 01:06:38,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=11239, Unknown=0, NotChecked=0, Total=11556 [2022-03-18 01:06:38,104 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 108 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:06:44,212 INFO L93 Difference]: Finished difference Result 257 states and 266 transitions. [2022-03-18 01:06:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-18 01:06:44,213 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 123 [2022-03-18 01:06:44,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:06:44,214 INFO L225 Difference]: With dead ends: 257 [2022-03-18 01:06:44,214 INFO L226 Difference]: Without dead ends: 135 [2022-03-18 01:06:44,227 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5460 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=945, Invalid=44211, Unknown=0, NotChecked=0, Total=45156 [2022-03-18 01:06:44,227 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 11428 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 11649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 11428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:06:44,227 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 11649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 11428 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-18 01:06:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-18 01:06:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-03-18 01:06:44,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 122 states have internal predecessors, (125), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:06:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-03-18 01:06:44,365 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 123 [2022-03-18 01:06:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:06:44,365 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-03-18 01:06:44,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-03-18 01:06:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-18 01:06:44,366 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:06:44,366 INFO L500 BasicCegarLoop]: trace histogram [104, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:06:44,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-03-18 01:06:44,366 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:06:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:06:44,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1202153438, now seen corresponding path program 104 times [2022-03-18 01:06:44,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:44,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [273077447] [2022-03-18 01:06:44,564 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:06:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1217368072, now seen corresponding path program 1 times [2022-03-18 01:06:44,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:44,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041390159] [2022-03-18 01:06:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:44,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:44,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:06:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:44,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:06:44,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041390159] [2022-03-18 01:06:44,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041390159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:44,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:44,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:06:47,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:06:47,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [273077447] [2022-03-18 01:06:47,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [273077447] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:47,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:47,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-03-18 01:06:47,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420772317] [2022-03-18 01:06:47,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:06:47,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-18 01:06:47,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:47,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-18 01:06:47,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=11452, Unknown=0, NotChecked=0, Total=11772 [2022-03-18 01:06:47,436 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 109 states, 109 states have (on average 1.073394495412844) internal successors, (117), 108 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:55,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:06:55,432 INFO L93 Difference]: Finished difference Result 259 states and 268 transitions. [2022-03-18 01:06:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-18 01:06:55,432 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.073394495412844) internal successors, (117), 108 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 124 [2022-03-18 01:06:55,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:06:55,433 INFO L225 Difference]: With dead ends: 259 [2022-03-18 01:06:55,433 INFO L226 Difference]: Without dead ends: 136 [2022-03-18 01:06:55,434 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5565 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=954, Invalid=45056, Unknown=0, NotChecked=0, Total=46010 [2022-03-18 01:06:55,435 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 12664 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 12887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 12664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:06:55,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 416 Invalid, 12887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 12664 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-18 01:06:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-18 01:06:55,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2022-03-18 01:06:55,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 123 states have internal predecessors, (126), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:06:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2022-03-18 01:06:55,560 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 124 [2022-03-18 01:06:55,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:06:55,560 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2022-03-18 01:06:55,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.073394495412844) internal successors, (117), 108 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:06:55,560 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2022-03-18 01:06:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-18 01:06:55,561 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:06:55,561 INFO L500 BasicCegarLoop]: trace histogram [105, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:06:55,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-03-18 01:06:55,561 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:06:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:06:55,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1954735614, now seen corresponding path program 105 times [2022-03-18 01:06:55,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:06:55,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [56427357] [2022-03-18 01:06:55,791 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:06:55,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1158262728, now seen corresponding path program 1 times [2022-03-18 01:06:55,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:06:55,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52218416] [2022-03-18 01:06:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:06:55,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:06:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:55,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:06:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:06:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:06:55,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:06:55,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52218416] [2022-03-18 01:06:55,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52218416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:06:55,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:06:55,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:07:00,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:07:00,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [56427357] [2022-03-18 01:07:00,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [56427357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:00,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:00,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-03-18 01:07:00,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562100695] [2022-03-18 01:07:00,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:07:00,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-18 01:07:00,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:00,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-18 01:07:00,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=11667, Unknown=0, NotChecked=0, Total=11990 [2022-03-18 01:07:00,174 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 110 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 109 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:07:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:07:08,331 INFO L93 Difference]: Finished difference Result 261 states and 270 transitions. [2022-03-18 01:07:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-18 01:07:08,332 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 109 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 125 [2022-03-18 01:07:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:07:08,332 INFO L225 Difference]: With dead ends: 261 [2022-03-18 01:07:08,332 INFO L226 Difference]: Without dead ends: 137 [2022-03-18 01:07:08,335 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5671 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=963, Invalid=45909, Unknown=0, NotChecked=0, Total=46872 [2022-03-18 01:07:08,335 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 13217 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 13441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 13217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:07:08,335 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 536 Invalid, 13441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 13217 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-18 01:07:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-18 01:07:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2022-03-18 01:07:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 123 states have (on average 1.032520325203252) internal successors, (127), 124 states have internal predecessors, (127), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:07:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-03-18 01:07:08,493 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 125 [2022-03-18 01:07:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:07:08,493 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-03-18 01:07:08,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 109 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:07:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-03-18 01:07:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-18 01:07:08,493 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:07:08,493 INFO L500 BasicCegarLoop]: trace histogram [106, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:07:08,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-03-18 01:07:08,493 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:07:08,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:07:08,494 INFO L85 PathProgramCache]: Analyzing trace with hash 485020706, now seen corresponding path program 106 times [2022-03-18 01:07:08,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:08,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1627171217] [2022-03-18 01:07:08,690 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:07:08,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1099157384, now seen corresponding path program 1 times [2022-03-18 01:07:08,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:08,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878497922] [2022-03-18 01:07:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:08,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:08,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:07:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:08,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:07:08,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878497922] [2022-03-18 01:07:08,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878497922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:08,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:08,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:07:12,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:07:12,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1627171217] [2022-03-18 01:07:12,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1627171217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:12,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:12,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-03-18 01:07:12,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304420272] [2022-03-18 01:07:12,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:07:12,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-18 01:07:12,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:12,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-18 01:07:12,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=11884, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 01:07:12,081 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 111 states, 111 states have (on average 1.072072072072072) internal successors, (119), 110 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:07:19,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:07:19,385 INFO L93 Difference]: Finished difference Result 263 states and 272 transitions. [2022-03-18 01:07:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-18 01:07:19,386 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.072072072072072) internal successors, (119), 110 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 126 [2022-03-18 01:07:19,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:07:19,386 INFO L225 Difference]: With dead ends: 263 [2022-03-18 01:07:19,386 INFO L226 Difference]: Without dead ends: 138 [2022-03-18 01:07:19,398 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5778 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=972, Invalid=46770, Unknown=0, NotChecked=0, Total=47742 [2022-03-18 01:07:19,398 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 12651 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 12877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 12651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:07:19,398 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 256 Invalid, 12877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 12651 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-18 01:07:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-18 01:07:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2022-03-18 01:07:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 124 states have (on average 1.032258064516129) internal successors, (128), 125 states have internal predecessors, (128), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:07:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-03-18 01:07:19,530 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 126 [2022-03-18 01:07:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:07:19,530 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-03-18 01:07:19,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.072072072072072) internal successors, (119), 110 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:07:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-03-18 01:07:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 01:07:19,531 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:07:19,531 INFO L500 BasicCegarLoop]: trace histogram [107, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:07:19,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-03-18 01:07:19,531 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:07:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:07:19,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1191944702, now seen corresponding path program 107 times [2022-03-18 01:07:19,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:19,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [976629543] [2022-03-18 01:07:19,799 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:07:19,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1040052040, now seen corresponding path program 1 times [2022-03-18 01:07:19,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:19,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351695281] [2022-03-18 01:07:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:19,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:19,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:07:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:19,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:07:19,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351695281] [2022-03-18 01:07:19,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351695281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:19,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:19,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:07:24,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:07:24,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [976629543] [2022-03-18 01:07:24,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [976629543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:24,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:24,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-03-18 01:07:24,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495440528] [2022-03-18 01:07:24,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:07:24,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-03-18 01:07:24,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:24,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-03-18 01:07:24,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=12103, Unknown=0, NotChecked=0, Total=12432 [2022-03-18 01:07:24,007 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 112 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 111 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:07:31,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:07:31,966 INFO L93 Difference]: Finished difference Result 265 states and 274 transitions. [2022-03-18 01:07:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-18 01:07:31,967 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 111 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 127 [2022-03-18 01:07:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:07:31,967 INFO L225 Difference]: With dead ends: 265 [2022-03-18 01:07:31,967 INFO L226 Difference]: Without dead ends: 139 [2022-03-18 01:07:31,969 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5886 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=981, Invalid=47639, Unknown=0, NotChecked=0, Total=48620 [2022-03-18 01:07:31,969 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 13053 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 13281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 13053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:07:31,969 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 321 Invalid, 13281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 13053 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-18 01:07:31,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-18 01:07:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2022-03-18 01:07:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 125 states have (on average 1.032) internal successors, (129), 126 states have internal predecessors, (129), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:07:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-03-18 01:07:32,139 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 127 [2022-03-18 01:07:32,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:07:32,139 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-03-18 01:07:32,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 111 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:07:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-03-18 01:07:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-18 01:07:32,140 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:07:32,140 INFO L500 BasicCegarLoop]: trace histogram [108, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:07:32,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-03-18 01:07:32,141 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:07:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:07:32,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1638264798, now seen corresponding path program 108 times [2022-03-18 01:07:32,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:32,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1435944554] [2022-03-18 01:07:32,353 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:07:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash -980946696, now seen corresponding path program 1 times [2022-03-18 01:07:32,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:32,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722501654] [2022-03-18 01:07:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:32,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:32,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:07:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:32,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:07:32,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722501654] [2022-03-18 01:07:32,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722501654] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:32,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:32,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:07:35,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:07:35,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1435944554] [2022-03-18 01:07:35,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1435944554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:35,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:35,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-03-18 01:07:35,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840666919] [2022-03-18 01:07:35,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:07:35,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-03-18 01:07:35,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:35,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-03-18 01:07:35,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=12324, Unknown=0, NotChecked=0, Total=12656 [2022-03-18 01:07:35,412 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 113 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 112 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:07:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:07:43,692 INFO L93 Difference]: Finished difference Result 267 states and 276 transitions. [2022-03-18 01:07:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-18 01:07:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 112 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 128 [2022-03-18 01:07:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:07:43,693 INFO L225 Difference]: With dead ends: 267 [2022-03-18 01:07:43,694 INFO L226 Difference]: Without dead ends: 140 [2022-03-18 01:07:43,697 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5995 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=990, Invalid=48516, Unknown=0, NotChecked=0, Total=49506 [2022-03-18 01:07:43,698 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 13653 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 13883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 13653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:07:43,698 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 456 Invalid, 13883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 13653 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-18 01:07:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-18 01:07:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-03-18 01:07:43,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 127 states have internal predecessors, (130), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:07:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-03-18 01:07:43,845 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 128 [2022-03-18 01:07:43,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:07:43,845 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-03-18 01:07:43,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 112 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:07:43,846 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-03-18 01:07:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-18 01:07:43,846 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:07:43,846 INFO L500 BasicCegarLoop]: trace histogram [109, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:07:43,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-03-18 01:07:43,846 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:07:43,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:07:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1705681410, now seen corresponding path program 109 times [2022-03-18 01:07:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:43,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [578444526] [2022-03-18 01:07:44,029 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:07:44,029 INFO L85 PathProgramCache]: Analyzing trace with hash -921841352, now seen corresponding path program 1 times [2022-03-18 01:07:44,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:44,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257077208] [2022-03-18 01:07:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:44,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:44,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:07:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:44,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:07:44,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257077208] [2022-03-18 01:07:44,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257077208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:44,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:44,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:07:48,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:07:48,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [578444526] [2022-03-18 01:07:48,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [578444526] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:48,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:48,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-03-18 01:07:48,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001397968] [2022-03-18 01:07:48,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:07:48,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-18 01:07:48,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:48,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-18 01:07:48,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=12547, Unknown=0, NotChecked=0, Total=12882 [2022-03-18 01:07:48,076 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 114 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 113 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:07:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:07:55,160 INFO L93 Difference]: Finished difference Result 269 states and 278 transitions. [2022-03-18 01:07:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-18 01:07:55,160 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 113 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 129 [2022-03-18 01:07:55,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:07:55,161 INFO L225 Difference]: With dead ends: 269 [2022-03-18 01:07:55,161 INFO L226 Difference]: Without dead ends: 141 [2022-03-18 01:07:55,163 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6105 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=999, Invalid=49401, Unknown=0, NotChecked=0, Total=50400 [2022-03-18 01:07:55,163 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 13484 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 13717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 13484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:07:55,163 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 316 Invalid, 13717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 13484 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-18 01:07:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-18 01:07:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2022-03-18 01:07:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 127 states have (on average 1.031496062992126) internal successors, (131), 128 states have internal predecessors, (131), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:07:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-03-18 01:07:55,320 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 129 [2022-03-18 01:07:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:07:55,320 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-03-18 01:07:55,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 113 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:07:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-03-18 01:07:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-18 01:07:55,320 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:07:55,320 INFO L500 BasicCegarLoop]: trace histogram [110, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:07:55,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-03-18 01:07:55,320 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:07:55,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:07:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2006168542, now seen corresponding path program 110 times [2022-03-18 01:07:55,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:07:55,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1532666796] [2022-03-18 01:07:55,537 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:07:55,538 INFO L85 PathProgramCache]: Analyzing trace with hash -862736008, now seen corresponding path program 1 times [2022-03-18 01:07:55,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:07:55,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841134130] [2022-03-18 01:07:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:07:55,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:07:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:55,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:07:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:07:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:07:55,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:07:55,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841134130] [2022-03-18 01:07:55,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841134130] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:07:55,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:07:55,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:08:00,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:08:00,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1532666796] [2022-03-18 01:08:00,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1532666796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:08:00,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:08:00,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-03-18 01:08:00,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287685372] [2022-03-18 01:08:00,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:08:00,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-18 01:08:00,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:00,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-18 01:08:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=12772, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 01:08:00,458 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 115 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 114 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:08:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:08:10,454 INFO L93 Difference]: Finished difference Result 271 states and 280 transitions. [2022-03-18 01:08:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-18 01:08:10,455 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 114 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 130 [2022-03-18 01:08:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:08:10,455 INFO L225 Difference]: With dead ends: 271 [2022-03-18 01:08:10,455 INFO L226 Difference]: Without dead ends: 142 [2022-03-18 01:08:10,458 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6216 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1008, Invalid=50294, Unknown=0, NotChecked=0, Total=51302 [2022-03-18 01:08:10,458 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 13682 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 13917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 13682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:08:10,459 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 306 Invalid, 13917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 13682 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-18 01:08:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-18 01:08:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 137. [2022-03-18 01:08:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 128 states have (on average 1.03125) internal successors, (132), 129 states have internal predecessors, (132), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:08:10,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-03-18 01:08:10,619 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 130 [2022-03-18 01:08:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:08:10,620 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-03-18 01:08:10,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 114 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:08:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-03-18 01:08:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 01:08:10,620 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:08:10,620 INFO L500 BasicCegarLoop]: trace histogram [111, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:08:10,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-03-18 01:08:10,620 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:08:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:08:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1109400062, now seen corresponding path program 111 times [2022-03-18 01:08:10,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:10,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [837414917] [2022-03-18 01:08:10,902 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:08:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash -803630664, now seen corresponding path program 1 times [2022-03-18 01:08:10,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:08:10,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269891320] [2022-03-18 01:08:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:08:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:08:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:10,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:08:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:10,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:08:10,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269891320] [2022-03-18 01:08:10,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269891320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:08:10,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:08:10,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:08:14,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:08:14,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [837414917] [2022-03-18 01:08:14,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [837414917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:08:14,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:08:14,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-03-18 01:08:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567685023] [2022-03-18 01:08:14,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:08:14,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-18 01:08:14,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:14,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-18 01:08:14,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=12999, Unknown=0, NotChecked=0, Total=13340 [2022-03-18 01:08:14,916 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 116 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 115 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:08:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:08:23,647 INFO L93 Difference]: Finished difference Result 273 states and 282 transitions. [2022-03-18 01:08:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-18 01:08:23,648 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 115 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 131 [2022-03-18 01:08:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:08:23,649 INFO L225 Difference]: With dead ends: 273 [2022-03-18 01:08:23,649 INFO L226 Difference]: Without dead ends: 143 [2022-03-18 01:08:23,651 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6328 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1017, Invalid=51195, Unknown=0, NotChecked=0, Total=52212 [2022-03-18 01:08:23,651 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 14597 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 14833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 14597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:08:23,651 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 551 Invalid, 14833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 14597 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-18 01:08:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-18 01:08:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2022-03-18 01:08:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 130 states have internal predecessors, (133), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:08:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-03-18 01:08:23,841 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 131 [2022-03-18 01:08:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:08:23,841 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-03-18 01:08:23,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 115 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:08:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-03-18 01:08:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-18 01:08:23,842 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:08:23,842 INFO L500 BasicCegarLoop]: trace histogram [112, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:08:23,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-03-18 01:08:23,842 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:08:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:08:23,842 INFO L85 PathProgramCache]: Analyzing trace with hash 920619042, now seen corresponding path program 112 times [2022-03-18 01:08:23,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:23,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1451931865] [2022-03-18 01:08:24,002 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:08:24,002 INFO L85 PathProgramCache]: Analyzing trace with hash -744525320, now seen corresponding path program 1 times [2022-03-18 01:08:24,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:08:24,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348098360] [2022-03-18 01:08:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:08:24,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:08:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:24,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:08:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:24,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:08:24,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348098360] [2022-03-18 01:08:24,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348098360] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:08:24,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:08:24,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:08:28,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:08:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1451931865] [2022-03-18 01:08:28,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1451931865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:08:28,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:08:28,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-03-18 01:08:28,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834390096] [2022-03-18 01:08:28,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:08:28,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-18 01:08:28,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:28,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-18 01:08:28,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=13228, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 01:08:28,057 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:08:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:08:38,360 INFO L93 Difference]: Finished difference Result 275 states and 284 transitions. [2022-03-18 01:08:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-18 01:08:38,361 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 132 [2022-03-18 01:08:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:08:38,361 INFO L225 Difference]: With dead ends: 275 [2022-03-18 01:08:38,362 INFO L226 Difference]: Without dead ends: 144 [2022-03-18 01:08:38,364 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6441 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1026, Invalid=52104, Unknown=0, NotChecked=0, Total=53130 [2022-03-18 01:08:38,364 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 13860 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 14099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 13860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:08:38,364 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 206 Invalid, 14099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 13860 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-18 01:08:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-18 01:08:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2022-03-18 01:08:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 131 states have internal predecessors, (134), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:08:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2022-03-18 01:08:38,524 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 132 [2022-03-18 01:08:38,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:08:38,524 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2022-03-18 01:08:38,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:08:38,524 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2022-03-18 01:08:38,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-18 01:08:38,525 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:08:38,525 INFO L500 BasicCegarLoop]: trace histogram [113, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:08:38,525 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-03-18 01:08:38,525 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:08:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:08:38,525 INFO L85 PathProgramCache]: Analyzing trace with hash -573298174, now seen corresponding path program 113 times [2022-03-18 01:08:38,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:38,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [59248992] [2022-03-18 01:08:38,770 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:08:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash -685419976, now seen corresponding path program 1 times [2022-03-18 01:08:38,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:08:38,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080705190] [2022-03-18 01:08:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:08:38,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:08:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:38,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:08:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:38,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:08:38,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080705190] [2022-03-18 01:08:38,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080705190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:08:38,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:08:38,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:08:43,763 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:08:43,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [59248992] [2022-03-18 01:08:43,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [59248992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:08:43,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:08:43,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-03-18 01:08:43,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687229479] [2022-03-18 01:08:43,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:08:43,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-03-18 01:08:43,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:43,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-03-18 01:08:43,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=13459, Unknown=0, NotChecked=0, Total=13806 [2022-03-18 01:08:43,766 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 118 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 117 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:08:54,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:08:54,040 INFO L93 Difference]: Finished difference Result 277 states and 286 transitions. [2022-03-18 01:08:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-18 01:08:54,040 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 117 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 133 [2022-03-18 01:08:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:08:54,041 INFO L225 Difference]: With dead ends: 277 [2022-03-18 01:08:54,041 INFO L226 Difference]: Without dead ends: 145 [2022-03-18 01:08:54,044 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6555 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1035, Invalid=53021, Unknown=0, NotChecked=0, Total=54056 [2022-03-18 01:08:54,044 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 14961 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 15201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 14961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:08:54,044 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 516 Invalid, 15201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 14961 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-03-18 01:08:54,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-18 01:08:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2022-03-18 01:08:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 131 states have (on average 1.0305343511450382) internal successors, (135), 132 states have internal predecessors, (135), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:08:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2022-03-18 01:08:54,200 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 133 [2022-03-18 01:08:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:08:54,201 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2022-03-18 01:08:54,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 117 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:08:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2022-03-18 01:08:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-18 01:08:54,201 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:08:54,201 INFO L500 BasicCegarLoop]: trace histogram [114, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:08:54,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-03-18 01:08:54,201 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:08:54,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:08:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash 359908386, now seen corresponding path program 114 times [2022-03-18 01:08:54,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:54,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [100426721] [2022-03-18 01:08:54,473 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:08:54,473 INFO L85 PathProgramCache]: Analyzing trace with hash -626314632, now seen corresponding path program 1 times [2022-03-18 01:08:54,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:08:54,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731977977] [2022-03-18 01:08:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:08:54,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:08:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:54,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:08:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:08:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:08:54,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:08:54,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731977977] [2022-03-18 01:08:54,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731977977] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:08:54,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:08:54,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:08:59,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:08:59,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [100426721] [2022-03-18 01:08:59,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [100426721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:08:59,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:08:59,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-03-18 01:08:59,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984304771] [2022-03-18 01:08:59,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:08:59,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-03-18 01:08:59,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:08:59,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-03-18 01:08:59,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=13692, Unknown=0, NotChecked=0, Total=14042 [2022-03-18 01:08:59,868 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 119 states, 119 states have (on average 1.0672268907563025) internal successors, (127), 118 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:09:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:09:10,700 INFO L93 Difference]: Finished difference Result 279 states and 288 transitions. [2022-03-18 01:09:10,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-18 01:09:10,701 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.0672268907563025) internal successors, (127), 118 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 134 [2022-03-18 01:09:10,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:09:10,701 INFO L225 Difference]: With dead ends: 279 [2022-03-18 01:09:10,701 INFO L226 Difference]: Without dead ends: 146 [2022-03-18 01:09:10,704 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6670 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1044, Invalid=53946, Unknown=0, NotChecked=0, Total=54990 [2022-03-18 01:09:10,704 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 14831 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 15073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 14831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:09:10,704 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 386 Invalid, 15073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 14831 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-03-18 01:09:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-18 01:09:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2022-03-18 01:09:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 133 states have internal predecessors, (136), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:09:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-03-18 01:09:10,862 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 134 [2022-03-18 01:09:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:09:10,863 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-03-18 01:09:10,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.0672268907563025) internal successors, (127), 118 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:09:10,863 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-03-18 01:09:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 01:09:10,864 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:09:10,864 INFO L500 BasicCegarLoop]: trace histogram [115, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:09:10,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-03-18 01:09:10,864 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:09:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:09:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash -775459326, now seen corresponding path program 115 times [2022-03-18 01:09:10,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:09:10,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [96295272] [2022-03-18 01:09:11,112 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:09:11,113 INFO L85 PathProgramCache]: Analyzing trace with hash -567209288, now seen corresponding path program 1 times [2022-03-18 01:09:11,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:09:11,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707297328] [2022-03-18 01:09:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:09:11,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:09:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:09:11,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:09:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:09:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:09:11,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:09:11,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707297328] [2022-03-18 01:09:11,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707297328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:09:11,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:09:11,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:09:15,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:09:15,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [96295272] [2022-03-18 01:09:15,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [96295272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:09:15,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:09:15,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-03-18 01:09:15,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865380010] [2022-03-18 01:09:15,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:09:15,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-03-18 01:09:15,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:09:15,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-03-18 01:09:15,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=13927, Unknown=0, NotChecked=0, Total=14280 [2022-03-18 01:09:15,430 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 120 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 119 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:09:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:09:22,730 INFO L93 Difference]: Finished difference Result 281 states and 290 transitions. [2022-03-18 01:09:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-18 01:09:22,730 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 119 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 135 [2022-03-18 01:09:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:09:22,731 INFO L225 Difference]: With dead ends: 281 [2022-03-18 01:09:22,731 INFO L226 Difference]: Without dead ends: 147 [2022-03-18 01:09:22,734 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6786 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1053, Invalid=54879, Unknown=0, NotChecked=0, Total=55932 [2022-03-18 01:09:22,734 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 14283 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 14527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 14283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:09:22,734 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 106 Invalid, 14527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 14283 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-18 01:09:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-18 01:09:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2022-03-18 01:09:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 134 states have internal predecessors, (137), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:09:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2022-03-18 01:09:22,898 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 135 [2022-03-18 01:09:22,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:09:22,898 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2022-03-18 01:09:22,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 119 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:09:22,898 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2022-03-18 01:09:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-18 01:09:22,898 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:09:22,898 INFO L500 BasicCegarLoop]: trace histogram [116, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:09:22,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-03-18 01:09:22,899 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:09:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:09:22,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1612120030, now seen corresponding path program 116 times [2022-03-18 01:09:22,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:09:22,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1846005627] [2022-03-18 01:09:23,156 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:09:23,157 INFO L85 PathProgramCache]: Analyzing trace with hash -508103944, now seen corresponding path program 1 times [2022-03-18 01:09:23,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:09:23,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263722530] [2022-03-18 01:09:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:09:23,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:09:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:09:23,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:09:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:09:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:09:23,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:09:23,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263722530] [2022-03-18 01:09:23,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263722530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:09:23,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:09:23,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:09:26,658 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:09:26,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1846005627] [2022-03-18 01:09:26,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1846005627] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:09:26,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:09:26,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-03-18 01:09:26,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905376916] [2022-03-18 01:09:26,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:09:26,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-03-18 01:09:26,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:09:26,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-03-18 01:09:26,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=14164, Unknown=0, NotChecked=0, Total=14520 [2022-03-18 01:09:26,660 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 121 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 120 states have internal predecessors, (129), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:09:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:09:34,467 INFO L93 Difference]: Finished difference Result 283 states and 292 transitions. [2022-03-18 01:09:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-03-18 01:09:34,467 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 120 states have internal predecessors, (129), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 136 [2022-03-18 01:09:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:09:34,468 INFO L225 Difference]: With dead ends: 283 [2022-03-18 01:09:34,468 INFO L226 Difference]: Without dead ends: 148 [2022-03-18 01:09:34,471 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1062, Invalid=55820, Unknown=0, NotChecked=0, Total=56882 [2022-03-18 01:09:34,471 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 14786 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 15033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 14786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:09:34,471 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 201 Invalid, 15033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 14786 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-18 01:09:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-18 01:09:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2022-03-18 01:09:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 135 states have internal predecessors, (138), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:09:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-03-18 01:09:34,639 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 136 [2022-03-18 01:09:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:09:34,640 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-03-18 01:09:34,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 120 states have internal predecessors, (129), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:09:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-03-18 01:09:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-18 01:09:34,640 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:09:34,640 INFO L500 BasicCegarLoop]: trace histogram [117, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:09:34,640 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-03-18 01:09:34,640 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:09:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:09:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1778798078, now seen corresponding path program 117 times [2022-03-18 01:09:34,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:09:34,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [925267089] [2022-03-18 01:09:34,802 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:09:34,803 INFO L85 PathProgramCache]: Analyzing trace with hash -448998600, now seen corresponding path program 1 times [2022-03-18 01:09:34,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:09:34,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431031202] [2022-03-18 01:09:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:09:34,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:09:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:09:34,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:09:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:09:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:09:34,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:09:34,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431031202] [2022-03-18 01:09:34,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431031202] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:09:34,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:09:34,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:09:40,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:09:40,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [925267089] [2022-03-18 01:09:40,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [925267089] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:09:40,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:09:40,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-03-18 01:09:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033709221] [2022-03-18 01:09:40,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:09:40,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-03-18 01:09:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:09:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-03-18 01:09:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=14403, Unknown=0, NotChecked=0, Total=14762 [2022-03-18 01:09:40,173 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 122 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 121 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:09:48,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:09:48,741 INFO L93 Difference]: Finished difference Result 285 states and 294 transitions. [2022-03-18 01:09:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-18 01:09:48,741 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 121 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 137 [2022-03-18 01:09:48,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:09:48,741 INFO L225 Difference]: With dead ends: 285 [2022-03-18 01:09:48,741 INFO L226 Difference]: Without dead ends: 149 [2022-03-18 01:09:48,744 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7021 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1071, Invalid=56769, Unknown=0, NotChecked=0, Total=57840 [2022-03-18 01:09:48,744 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 14971 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 15219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 14971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:09:48,744 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 181 Invalid, 15219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 14971 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-18 01:09:48,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-18 01:09:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 144. [2022-03-18 01:09:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 136 states have internal predecessors, (139), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:09:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2022-03-18 01:09:48,909 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 137 [2022-03-18 01:09:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:09:48,909 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2022-03-18 01:09:48,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 121 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:09:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2022-03-18 01:09:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 01:09:48,910 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:09:48,910 INFO L500 BasicCegarLoop]: trace histogram [118, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:09:48,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-03-18 01:09:48,911 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:09:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:09:48,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1644117026, now seen corresponding path program 118 times [2022-03-18 01:09:48,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:09:48,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1709420896] [2022-03-18 01:09:49,224 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:09:49,225 INFO L85 PathProgramCache]: Analyzing trace with hash -389893256, now seen corresponding path program 1 times [2022-03-18 01:09:49,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:09:49,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463435349] [2022-03-18 01:09:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:09:49,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:09:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:09:49,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:09:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:09:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:09:49,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:09:49,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463435349] [2022-03-18 01:09:49,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463435349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:09:49,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:09:49,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:09:54,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:09:54,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1709420896] [2022-03-18 01:09:54,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1709420896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:09:54,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:09:54,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-03-18 01:09:54,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823264975] [2022-03-18 01:09:54,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:09:54,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-03-18 01:09:54,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:09:54,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-03-18 01:09:54,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=14644, Unknown=0, NotChecked=0, Total=15006 [2022-03-18 01:09:54,869 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 123 states, 123 states have (on average 1.065040650406504) internal successors, (131), 122 states have internal predecessors, (131), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:10:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:10:04,329 INFO L93 Difference]: Finished difference Result 287 states and 296 transitions. [2022-03-18 01:10:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-18 01:10:04,329 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.065040650406504) internal successors, (131), 122 states have internal predecessors, (131), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 138 [2022-03-18 01:10:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:10:04,330 INFO L225 Difference]: With dead ends: 287 [2022-03-18 01:10:04,330 INFO L226 Difference]: Without dead ends: 150 [2022-03-18 01:10:04,333 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7140 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1080, Invalid=57726, Unknown=0, NotChecked=0, Total=58806 [2022-03-18 01:10:04,333 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 15325 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 15575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 15325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:10:04,333 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 221 Invalid, 15575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 15325 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-18 01:10:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-18 01:10:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2022-03-18 01:10:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 137 states have internal predecessors, (140), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:10:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-03-18 01:10:04,516 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 138 [2022-03-18 01:10:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:10:04,516 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-03-18 01:10:04,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.065040650406504) internal successors, (131), 122 states have internal predecessors, (131), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:10:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-03-18 01:10:04,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-18 01:10:04,516 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:10:04,516 INFO L500 BasicCegarLoop]: trace histogram [119, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:10:04,516 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-03-18 01:10:04,517 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:10:04,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:10:04,517 INFO L85 PathProgramCache]: Analyzing trace with hash 380302850, now seen corresponding path program 119 times [2022-03-18 01:10:04,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:10:04,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23957514] [2022-03-18 01:10:04,804 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:10:04,805 INFO L85 PathProgramCache]: Analyzing trace with hash -330787912, now seen corresponding path program 1 times [2022-03-18 01:10:04,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:10:04,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518830094] [2022-03-18 01:10:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:10:04,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:10:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:10:04,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:10:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:10:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:10:04,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:10:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518830094] [2022-03-18 01:10:04,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518830094] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:10:04,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:10:04,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:10:10,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:10:10,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [23957514] [2022-03-18 01:10:10,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [23957514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:10:10,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:10:10,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-03-18 01:10:10,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749356981] [2022-03-18 01:10:10,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:10:10,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-03-18 01:10:10,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:10:10,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-03-18 01:10:10,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=14887, Unknown=0, NotChecked=0, Total=15252 [2022-03-18 01:10:10,572 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 124 states, 124 states have (on average 1.064516129032258) internal successors, (132), 123 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:10:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:10:21,620 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2022-03-18 01:10:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-18 01:10:21,621 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.064516129032258) internal successors, (132), 123 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 139 [2022-03-18 01:10:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:10:21,622 INFO L225 Difference]: With dead ends: 289 [2022-03-18 01:10:21,622 INFO L226 Difference]: Without dead ends: 151 [2022-03-18 01:10:21,625 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7260 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1089, Invalid=58691, Unknown=0, NotChecked=0, Total=59780 [2022-03-18 01:10:21,625 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 16675 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 16927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 16675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:10:21,625 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 616 Invalid, 16927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 16675 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-03-18 01:10:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-18 01:10:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2022-03-18 01:10:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 138 states have internal predecessors, (141), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:10:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2022-03-18 01:10:21,814 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 139 [2022-03-18 01:10:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:10:21,814 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2022-03-18 01:10:21,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.064516129032258) internal successors, (132), 123 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:10:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2022-03-18 01:10:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-18 01:10:21,815 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:10:21,815 INFO L500 BasicCegarLoop]: trace histogram [120, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:10:21,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-03-18 01:10:21,815 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:10:21,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:10:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash -143230942, now seen corresponding path program 120 times [2022-03-18 01:10:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:10:21,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [974598832] [2022-03-18 01:10:22,042 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:10:22,042 INFO L85 PathProgramCache]: Analyzing trace with hash -271682568, now seen corresponding path program 1 times [2022-03-18 01:10:22,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:10:22,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456097171] [2022-03-18 01:10:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:10:22,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:10:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:10:22,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:10:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:10:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:10:22,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:10:22,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456097171] [2022-03-18 01:10:22,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456097171] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:10:22,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:10:22,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:10:27,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:10:27,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [974598832] [2022-03-18 01:10:27,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [974598832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:10:27,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:10:27,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-03-18 01:10:27,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802099931] [2022-03-18 01:10:27,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:10:27,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-03-18 01:10:27,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:10:27,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-03-18 01:10:27,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=15132, Unknown=0, NotChecked=0, Total=15500 [2022-03-18 01:10:27,174 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 125 states, 125 states have (on average 1.064) internal successors, (133), 124 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:10:38,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:10:38,624 INFO L93 Difference]: Finished difference Result 291 states and 300 transitions. [2022-03-18 01:10:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-18 01:10:38,625 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.064) internal successors, (133), 124 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 140 [2022-03-18 01:10:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:10:38,626 INFO L225 Difference]: With dead ends: 291 [2022-03-18 01:10:38,626 INFO L226 Difference]: Without dead ends: 152 [2022-03-18 01:10:38,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7381 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1098, Invalid=59664, Unknown=0, NotChecked=0, Total=60762 [2022-03-18 01:10:38,629 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 16556 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 16811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 16556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:10:38,629 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 486 Invalid, 16811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 16556 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-03-18 01:10:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-18 01:10:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2022-03-18 01:10:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 139 states have internal predecessors, (142), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:10:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-03-18 01:10:38,808 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 140 [2022-03-18 01:10:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:10:38,808 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-03-18 01:10:38,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.064) internal successors, (133), 124 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:10:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-03-18 01:10:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-18 01:10:38,809 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:10:38,809 INFO L500 BasicCegarLoop]: trace histogram [121, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:10:38,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-03-18 01:10:38,809 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:10:38,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:10:38,809 INFO L85 PathProgramCache]: Analyzing trace with hash 807090690, now seen corresponding path program 121 times [2022-03-18 01:10:38,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:10:38,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [263106975] [2022-03-18 01:10:39,051 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:10:39,052 INFO L85 PathProgramCache]: Analyzing trace with hash -212577224, now seen corresponding path program 1 times [2022-03-18 01:10:39,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:10:39,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543866438] [2022-03-18 01:10:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:10:39,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:10:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:10:39,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:10:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:10:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:10:39,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:10:39,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543866438] [2022-03-18 01:10:39,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543866438] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:10:39,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:10:39,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:10:43,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:10:43,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [263106975] [2022-03-18 01:10:43,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [263106975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:10:43,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:10:43,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-03-18 01:10:43,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870431452] [2022-03-18 01:10:43,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:10:43,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-03-18 01:10:43,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:10:43,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-03-18 01:10:43,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=15379, Unknown=0, NotChecked=0, Total=15750 [2022-03-18 01:10:43,301 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 126 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 125 states have internal predecessors, (134), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:10:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:10:52,091 INFO L93 Difference]: Finished difference Result 293 states and 302 transitions. [2022-03-18 01:10:52,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-18 01:10:52,092 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 125 states have internal predecessors, (134), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 141 [2022-03-18 01:10:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:10:52,092 INFO L225 Difference]: With dead ends: 293 [2022-03-18 01:10:52,092 INFO L226 Difference]: Without dead ends: 153 [2022-03-18 01:10:52,095 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7503 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1107, Invalid=60645, Unknown=0, NotChecked=0, Total=61752 [2022-03-18 01:10:52,095 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 16021 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 16277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 16021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:10:52,095 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 206 Invalid, 16277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 16021 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-18 01:10:52,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-18 01:10:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2022-03-18 01:10:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 140 states have internal predecessors, (143), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:10:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2022-03-18 01:10:52,261 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 141 [2022-03-18 01:10:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:10:52,262 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2022-03-18 01:10:52,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 125 states have internal predecessors, (134), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:10:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2022-03-18 01:10:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-18 01:10:52,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:10:52,262 INFO L500 BasicCegarLoop]: trace histogram [122, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:10:52,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-03-18 01:10:52,262 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:10:52,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:10:52,263 INFO L85 PathProgramCache]: Analyzing trace with hash 202290210, now seen corresponding path program 122 times [2022-03-18 01:10:52,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:10:52,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [399627095] [2022-03-18 01:10:52,443 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:10:52,443 INFO L85 PathProgramCache]: Analyzing trace with hash -153471880, now seen corresponding path program 1 times [2022-03-18 01:10:52,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:10:52,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006253288] [2022-03-18 01:10:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:10:52,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:10:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:10:52,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:10:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:10:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:10:52,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:10:52,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006253288] [2022-03-18 01:10:52,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006253288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:10:52,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:10:52,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:10:58,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:10:58,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [399627095] [2022-03-18 01:10:58,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [399627095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:10:58,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:10:58,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-03-18 01:10:58,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767043870] [2022-03-18 01:10:58,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:10:58,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-03-18 01:10:58,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:10:58,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-03-18 01:10:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=15628, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 01:10:58,060 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 127 states, 127 states have (on average 1.062992125984252) internal successors, (135), 126 states have internal predecessors, (135), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:11:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:07,529 INFO L93 Difference]: Finished difference Result 295 states and 304 transitions. [2022-03-18 01:11:07,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-18 01:11:07,529 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.062992125984252) internal successors, (135), 126 states have internal predecessors, (135), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 142 [2022-03-18 01:11:07,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:07,530 INFO L225 Difference]: With dead ends: 295 [2022-03-18 01:11:07,530 INFO L226 Difference]: Without dead ends: 154 [2022-03-18 01:11:07,532 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7626 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1116, Invalid=61634, Unknown=0, NotChecked=0, Total=62750 [2022-03-18 01:11:07,532 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 17167 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 17425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 17167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:07,532 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 526 Invalid, 17425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 17167 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-18 01:11:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-18 01:11:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2022-03-18 01:11:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 141 states have internal predecessors, (144), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:11:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2022-03-18 01:11:07,701 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 142 [2022-03-18 01:11:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:07,702 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2022-03-18 01:11:07,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.062992125984252) internal successors, (135), 126 states have internal predecessors, (135), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:11:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2022-03-18 01:11:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-18 01:11:07,702 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:07,702 INFO L500 BasicCegarLoop]: trace histogram [123, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:07,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-03-18 01:11:07,703 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:07,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1366655486, now seen corresponding path program 123 times [2022-03-18 01:11:07,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:07,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [318716509] [2022-03-18 01:11:07,873 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:11:07,875 INFO L85 PathProgramCache]: Analyzing trace with hash -94366536, now seen corresponding path program 1 times [2022-03-18 01:11:07,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:07,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160138282] [2022-03-18 01:11:07,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:07,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:07,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:11:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:11:07,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:07,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160138282] [2022-03-18 01:11:07,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160138282] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:07,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:07,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:11:11,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:11,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [318716509] [2022-03-18 01:11:11,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [318716509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:11,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:11,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-03-18 01:11:11,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12096346] [2022-03-18 01:11:11,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:11,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-03-18 01:11:11,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:11,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-03-18 01:11:11,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=15879, Unknown=0, NotChecked=0, Total=16256 [2022-03-18 01:11:11,839 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 128 states, 128 states have (on average 1.0625) internal successors, (136), 127 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:11:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:21,023 INFO L93 Difference]: Finished difference Result 297 states and 306 transitions. [2022-03-18 01:11:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-18 01:11:21,024 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.0625) internal successors, (136), 127 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 143 [2022-03-18 01:11:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:21,025 INFO L225 Difference]: With dead ends: 297 [2022-03-18 01:11:21,025 INFO L226 Difference]: Without dead ends: 155 [2022-03-18 01:11:21,037 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7750 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1125, Invalid=62631, Unknown=0, NotChecked=0, Total=63756 [2022-03-18 01:11:21,038 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 16046 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 16307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 16046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:21,039 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 16307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 16046 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-18 01:11:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-18 01:11:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 150. [2022-03-18 01:11:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 141 states have (on average 1.0283687943262412) internal successors, (145), 142 states have internal predecessors, (145), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:11:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-03-18 01:11:21,311 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 143 [2022-03-18 01:11:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:21,311 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-03-18 01:11:21,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.0625) internal successors, (136), 127 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:11:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-03-18 01:11:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-18 01:11:21,312 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:21,312 INFO L500 BasicCegarLoop]: trace histogram [124, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:21,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-03-18 01:11:21,312 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:21,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1535635490, now seen corresponding path program 124 times [2022-03-18 01:11:21,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:21,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2075677024] [2022-03-18 01:11:21,548 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:11:21,549 INFO L85 PathProgramCache]: Analyzing trace with hash -35261192, now seen corresponding path program 1 times [2022-03-18 01:11:21,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:21,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303181425] [2022-03-18 01:11:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:21,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:21,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:11:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:11:21,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303181425] [2022-03-18 01:11:21,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303181425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:21,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:21,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:11:27,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:27,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2075677024] [2022-03-18 01:11:27,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2075677024] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:27,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:27,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-03-18 01:11:27,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880810669] [2022-03-18 01:11:27,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:27,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-03-18 01:11:27,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:27,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-03-18 01:11:27,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=16132, Unknown=0, NotChecked=0, Total=16512 [2022-03-18 01:11:27,686 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 129 states, 129 states have (on average 1.062015503875969) internal successors, (137), 128 states have internal predecessors, (137), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:11:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:40,523 INFO L93 Difference]: Finished difference Result 299 states and 308 transitions. [2022-03-18 01:11:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-18 01:11:40,524 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.062015503875969) internal successors, (137), 128 states have internal predecessors, (137), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 144 [2022-03-18 01:11:40,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:40,525 INFO L225 Difference]: With dead ends: 299 [2022-03-18 01:11:40,525 INFO L226 Difference]: Without dead ends: 156 [2022-03-18 01:11:40,528 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7875 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1134, Invalid=63636, Unknown=0, NotChecked=0, Total=64770 [2022-03-18 01:11:40,528 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 17617 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 17879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 17617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:40,528 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 506 Invalid, 17879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 17617 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-03-18 01:11:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-18 01:11:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2022-03-18 01:11:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 142 states have (on average 1.028169014084507) internal successors, (146), 143 states have internal predecessors, (146), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:11:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2022-03-18 01:11:40,713 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 144 [2022-03-18 01:11:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:40,713 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2022-03-18 01:11:40,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.062015503875969) internal successors, (137), 128 states have internal predecessors, (137), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:11:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2022-03-18 01:11:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-18 01:11:40,714 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:40,714 INFO L500 BasicCegarLoop]: trace histogram [125, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:40,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-03-18 01:11:40,714 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1312342530, now seen corresponding path program 125 times [2022-03-18 01:11:40,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:40,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1923815810] [2022-03-18 01:11:41,038 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:11:41,039 INFO L85 PathProgramCache]: Analyzing trace with hash 23844152, now seen corresponding path program 1 times [2022-03-18 01:11:41,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:41,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966155173] [2022-03-18 01:11:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:41,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:41,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:11:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:11:41,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:41,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966155173] [2022-03-18 01:11:41,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966155173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:41,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:41,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:11:45,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:45,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1923815810] [2022-03-18 01:11:45,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1923815810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:45,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:45,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-03-18 01:11:45,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736750105] [2022-03-18 01:11:45,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:45,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-03-18 01:11:45,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:45,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-03-18 01:11:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=16387, Unknown=0, NotChecked=0, Total=16770 [2022-03-18 01:11:45,997 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 130 states, 130 states have (on average 1.0615384615384615) internal successors, (138), 129 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:11:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:56,058 INFO L93 Difference]: Finished difference Result 301 states and 310 transitions. [2022-03-18 01:11:56,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-18 01:11:56,059 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.0615384615384615) internal successors, (138), 129 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 145 [2022-03-18 01:11:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:56,059 INFO L225 Difference]: With dead ends: 301 [2022-03-18 01:11:56,059 INFO L226 Difference]: Without dead ends: 157 [2022-03-18 01:11:56,062 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8001 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1143, Invalid=64649, Unknown=0, NotChecked=0, Total=65792 [2022-03-18 01:11:56,063 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 18041 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 18305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 18041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:56,063 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 566 Invalid, 18305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 18041 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-03-18 01:11:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-18 01:11:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 152. [2022-03-18 01:11:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 143 states have (on average 1.027972027972028) internal successors, (147), 144 states have internal predecessors, (147), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:11:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2022-03-18 01:11:56,253 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 145 [2022-03-18 01:11:56,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:56,253 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2022-03-18 01:11:56,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.0615384615384615) internal successors, (138), 129 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:11:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2022-03-18 01:11:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-18 01:11:56,254 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:56,254 INFO L500 BasicCegarLoop]: trace histogram [126, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:56,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-03-18 01:11:56,254 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:56,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:56,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1314771934, now seen corresponding path program 126 times [2022-03-18 01:11:56,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:56,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1686754067] [2022-03-18 01:11:56,510 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:11:56,511 INFO L85 PathProgramCache]: Analyzing trace with hash 82949496, now seen corresponding path program 1 times [2022-03-18 01:11:56,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:56,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409702908] [2022-03-18 01:11:56,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:56,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:56,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:11:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:11:56,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:56,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409702908] [2022-03-18 01:11:56,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409702908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:56,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:56,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:12:02,415 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:12:02,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1686754067] [2022-03-18 01:12:02,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1686754067] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:02,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:02,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-03-18 01:12:02,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888921060] [2022-03-18 01:12:02,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:12:02,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-03-18 01:12:02,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-03-18 01:12:02,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=16644, Unknown=0, NotChecked=0, Total=17030 [2022-03-18 01:12:02,417 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 131 states, 131 states have (on average 1.0610687022900764) internal successors, (139), 130 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:12:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:12:15,771 INFO L93 Difference]: Finished difference Result 303 states and 312 transitions. [2022-03-18 01:12:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-18 01:12:15,772 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.0610687022900764) internal successors, (139), 130 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 146 [2022-03-18 01:12:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:12:15,773 INFO L225 Difference]: With dead ends: 303 [2022-03-18 01:12:15,773 INFO L226 Difference]: Without dead ends: 158 [2022-03-18 01:12:15,776 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8128 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1152, Invalid=65670, Unknown=0, NotChecked=0, Total=66822 [2022-03-18 01:12:15,776 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 17836 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 18103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 17836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:12:15,776 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 401 Invalid, 18103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 17836 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-03-18 01:12:15,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-18 01:12:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 153. [2022-03-18 01:12:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 145 states have internal predecessors, (148), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:12:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2022-03-18 01:12:15,966 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 146 [2022-03-18 01:12:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:12:15,966 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2022-03-18 01:12:15,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.0610687022900764) internal successors, (139), 130 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:12:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2022-03-18 01:12:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-18 01:12:15,967 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:12:15,967 INFO L500 BasicCegarLoop]: trace histogram [127, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:12:15,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-03-18 01:12:15,967 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:12:15,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:12:15,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1150941694, now seen corresponding path program 127 times [2022-03-18 01:12:15,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:15,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1360057097] [2022-03-18 01:12:16,165 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:12:16,166 INFO L85 PathProgramCache]: Analyzing trace with hash 142054840, now seen corresponding path program 1 times [2022-03-18 01:12:16,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:12:16,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964165134] [2022-03-18 01:12:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:12:16,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:12:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:12:16,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:12:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:12:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:12:16,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:12:16,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964165134] [2022-03-18 01:12:16,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964165134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:16,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:16,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:12:22,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:12:22,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1360057097] [2022-03-18 01:12:22,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1360057097] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:22,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:22,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-03-18 01:12:22,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303697708] [2022-03-18 01:12:22,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:12:22,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-03-18 01:12:22,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:22,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-03-18 01:12:22,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=16903, Unknown=0, NotChecked=0, Total=17292 [2022-03-18 01:12:22,582 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 132 states, 132 states have (on average 1.0606060606060606) internal successors, (140), 131 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:12:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:12:34,874 INFO L93 Difference]: Finished difference Result 305 states and 314 transitions. [2022-03-18 01:12:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-18 01:12:34,874 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.0606060606060606) internal successors, (140), 131 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 147 [2022-03-18 01:12:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:12:34,875 INFO L225 Difference]: With dead ends: 305 [2022-03-18 01:12:34,875 INFO L226 Difference]: Without dead ends: 159 [2022-03-18 01:12:34,877 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8256 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1161, Invalid=66699, Unknown=0, NotChecked=0, Total=67860 [2022-03-18 01:12:34,877 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 17368 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 17637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 17368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:12:34,878 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 141 Invalid, 17637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 17368 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-03-18 01:12:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-18 01:12:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2022-03-18 01:12:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 146 states have internal predecessors, (149), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:12:35,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2022-03-18 01:12:35,080 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 147 [2022-03-18 01:12:35,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:12:35,081 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2022-03-18 01:12:35,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.0606060606060606) internal successors, (140), 131 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:12:35,081 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2022-03-18 01:12:35,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-18 01:12:35,081 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:12:35,081 INFO L500 BasicCegarLoop]: trace histogram [128, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:12:35,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-03-18 01:12:35,081 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:12:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:12:35,082 INFO L85 PathProgramCache]: Analyzing trace with hash -367171550, now seen corresponding path program 128 times [2022-03-18 01:12:35,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:35,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1481985673] [2022-03-18 01:12:35,348 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:12:35,349 INFO L85 PathProgramCache]: Analyzing trace with hash 201160184, now seen corresponding path program 1 times [2022-03-18 01:12:35,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:12:35,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765644806] [2022-03-18 01:12:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:12:35,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:12:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:12:35,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:12:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:12:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:12:35,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:12:35,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765644806] [2022-03-18 01:12:35,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765644806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:35,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:35,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:12:41,274 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:12:41,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1481985673] [2022-03-18 01:12:41,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1481985673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:41,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:41,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-03-18 01:12:41,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781692677] [2022-03-18 01:12:41,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:12:41,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-03-18 01:12:41,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:41,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-03-18 01:12:41,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=17164, Unknown=0, NotChecked=0, Total=17556 [2022-03-18 01:12:41,276 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 133 states, 133 states have (on average 1.0601503759398496) internal successors, (141), 132 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:12:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:12:51,825 INFO L93 Difference]: Finished difference Result 307 states and 316 transitions. [2022-03-18 01:12:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-03-18 01:12:51,825 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.0601503759398496) internal successors, (141), 132 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 148 [2022-03-18 01:12:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:12:51,826 INFO L225 Difference]: With dead ends: 307 [2022-03-18 01:12:51,826 INFO L226 Difference]: Without dead ends: 160 [2022-03-18 01:12:51,829 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8385 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1170, Invalid=67736, Unknown=0, NotChecked=0, Total=68906 [2022-03-18 01:12:51,829 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 18288 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 18559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 18288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:12:51,829 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 376 Invalid, 18559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 18288 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-03-18 01:12:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-18 01:12:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2022-03-18 01:12:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 147 states have internal predecessors, (150), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:12:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2022-03-18 01:12:52,028 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 148 [2022-03-18 01:12:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:12:52,028 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2022-03-18 01:12:52,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.0601503759398496) internal successors, (141), 132 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:12:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2022-03-18 01:12:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 01:12:52,029 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:12:52,029 INFO L500 BasicCegarLoop]: trace histogram [129, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:12:52,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-03-18 01:12:52,029 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:12:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:12:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1840100862, now seen corresponding path program 129 times [2022-03-18 01:12:52,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:52,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [606867367] [2022-03-18 01:12:52,204 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:12:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash 260265528, now seen corresponding path program 1 times [2022-03-18 01:12:52,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:12:52,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010060786] [2022-03-18 01:12:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:12:52,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:12:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:12:52,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:12:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:12:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:12:52,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:12:52,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010060786] [2022-03-18 01:12:52,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010060786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:52,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:52,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:12:58,286 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:12:58,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [606867367] [2022-03-18 01:12:58,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [606867367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:58,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:58,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-03-18 01:12:58,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493547188] [2022-03-18 01:12:58,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:12:58,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-18 01:12:58,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-18 01:12:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=17427, Unknown=0, NotChecked=0, Total=17822 [2022-03-18 01:12:58,288 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 134 states, 134 states have (on average 1.0597014925373134) internal successors, (142), 133 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:13:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:10,595 INFO L93 Difference]: Finished difference Result 309 states and 318 transitions. [2022-03-18 01:13:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-03-18 01:13:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.0597014925373134) internal successors, (142), 133 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 149 [2022-03-18 01:13:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:10,596 INFO L225 Difference]: With dead ends: 309 [2022-03-18 01:13:10,596 INFO L226 Difference]: Without dead ends: 161 [2022-03-18 01:13:10,599 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8515 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1179, Invalid=68781, Unknown=0, NotChecked=0, Total=69960 [2022-03-18 01:13:10,599 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 18104 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 18377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 18104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:10,599 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 216 Invalid, 18377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 18104 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-03-18 01:13:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-18 01:13:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2022-03-18 01:13:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 148 states have internal predecessors, (151), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:13:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2022-03-18 01:13:10,805 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 149 [2022-03-18 01:13:10,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:10,805 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2022-03-18 01:13:10,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.0597014925373134) internal successors, (142), 133 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:13:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2022-03-18 01:13:10,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-18 01:13:10,806 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:10,806 INFO L500 BasicCegarLoop]: trace histogram [130, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:10,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-03-18 01:13:10,806 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:10,806 INFO L85 PathProgramCache]: Analyzing trace with hash -256269278, now seen corresponding path program 130 times [2022-03-18 01:13:10,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:10,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1917068266] [2022-03-18 01:13:11,167 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:13:11,169 INFO L85 PathProgramCache]: Analyzing trace with hash 319370872, now seen corresponding path program 1 times [2022-03-18 01:13:11,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:11,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210410512] [2022-03-18 01:13:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:11,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:11,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:13:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:13:11,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:11,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210410512] [2022-03-18 01:13:11,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210410512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:11,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:11,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:13:16,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:16,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1917068266] [2022-03-18 01:13:16,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1917068266] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:16,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:16,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-03-18 01:13:16,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759639776] [2022-03-18 01:13:16,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:16,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-03-18 01:13:16,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:16,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-03-18 01:13:16,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=17692, Unknown=0, NotChecked=0, Total=18090 [2022-03-18 01:13:16,736 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 135 states, 135 states have (on average 1.0592592592592593) internal successors, (143), 134 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:13:27,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:27,416 INFO L93 Difference]: Finished difference Result 311 states and 320 transitions. [2022-03-18 01:13:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-03-18 01:13:27,416 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.0592592592592593) internal successors, (143), 134 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 150 [2022-03-18 01:13:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:27,417 INFO L225 Difference]: With dead ends: 311 [2022-03-18 01:13:27,417 INFO L226 Difference]: Without dead ends: 162 [2022-03-18 01:13:27,420 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8646 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1188, Invalid=69834, Unknown=0, NotChecked=0, Total=71022 [2022-03-18 01:13:27,420 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 18566 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 18841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 18566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:27,420 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 286 Invalid, 18841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 18566 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-03-18 01:13:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-18 01:13:27,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2022-03-18 01:13:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 148 states have (on average 1.027027027027027) internal successors, (152), 149 states have internal predecessors, (152), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 01:13:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-03-18 01:13:27,625 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 150 [2022-03-18 01:13:27,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:27,625 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-03-18 01:13:27,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.0592592592592593) internal successors, (143), 134 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:13:27,625 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-03-18 01:13:27,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-18 01:13:27,626 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:27,626 INFO L500 BasicCegarLoop]: trace histogram [131, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:27,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-03-18 01:13:27,626 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:27,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1597869570, now seen corresponding path program 131 times [2022-03-18 01:13:27,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:27,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1114967112] [2022-03-18 01:13:27,995 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:13:27,996 INFO L85 PathProgramCache]: Analyzing trace with hash 378476216, now seen corresponding path program 1 times [2022-03-18 01:13:27,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:27,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600575034] [2022-03-18 01:13:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:27,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:28,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:13:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:13:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 01:13:28,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:28,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600575034] [2022-03-18 01:13:28,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600575034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:28,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:28,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 01:13:33,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:33,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1114967112] [2022-03-18 01:13:33,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1114967112] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:33,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:33,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-03-18 01:13:33,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904350988] [2022-03-18 01:13:33,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:33,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-03-18 01:13:33,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:33,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-03-18 01:13:33,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=17959, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 01:13:33,813 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 136 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 135 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)