/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-invgen/seq-3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:15:35,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:15:35,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:15:35,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:15:35,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:15:35,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:15:35,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:15:35,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:15:35,434 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:15:35,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:15:35,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:15:35,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:15:35,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:15:35,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:15:35,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:15:35,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:15:35,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:15:35,437 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:15:35,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:15:35,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:15:35,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:15:35,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:15:35,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:15:35,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:15:35,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:15:35,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:15:35,438 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:15:35,438 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:15:35,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:15:35,438 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:15:35,438 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:15:35,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:15:35,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:15:35,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:15:35,650 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:15:35,650 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:15:35,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/seq-3.i [2022-03-20 18:15:35,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/644085c16/b95f03afe87d49b3b64077ad34528c0c/FLAG6db163c20 [2022-03-20 18:15:36,068 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:15:36,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i [2022-03-20 18:15:36,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/644085c16/b95f03afe87d49b3b64077ad34528c0c/FLAG6db163c20 [2022-03-20 18:15:36,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/644085c16/b95f03afe87d49b3b64077ad34528c0c [2022-03-20 18:15:36,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:15:36,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:15:36,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:15:36,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:15:36,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:15:36,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:15:36" (1/1) ... [2022-03-20 18:15:36,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d0bc741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:15:36, skipping insertion in model container [2022-03-20 18:15:36,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:15:36" (1/1) ... [2022-03-20 18:15:36,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:15:36,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:15:36,270 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i[893,906] [2022-03-20 18:15:36,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:15:36,288 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:15:36,298 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i[893,906] [2022-03-20 18:15:36,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:15:36,318 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:15:36,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:15:36 WrapperNode [2022-03-20 18:15:36,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:15:36,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:15:36,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:15:36,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:15:36,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:15:36" (1/1) ... [2022-03-20 18:15:36,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:15:36" (1/1) ... [2022-03-20 18:15:36,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:15:36" (1/1) ... [2022-03-20 18:15:36,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:15:36" (1/1) ... [2022-03-20 18:15:36,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:15:36" (1/1) ... [2022-03-20 18:15:36,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:15:36" (1/1) ... [2022-03-20 18:15:36,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:15:36" (1/1) ... [2022-03-20 18:15:36,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:15:36,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:15:36,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:15:36,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:15:36,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:15:36" (1/1) ... [2022-03-20 18:15:36,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:15:36,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:15:36,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 18:15:36,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 18:15:36,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:15:36,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:15:36,420 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:15:36,420 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 18:15:36,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 18:15:36,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:15:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:15:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:15:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 18:15:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 18:15:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:15:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:15:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 18:15:36,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:15:36,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 18:15:36,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:15:36,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:15:36,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:15:36,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:15:36,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:15:36,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:15:36,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:15:36,483 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:15:36,484 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:15:36,569 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:15:36,573 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:15:36,573 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 18:15:36,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:15:36 BoogieIcfgContainer [2022-03-20 18:15:36,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:15:36,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:15:36,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:15:36,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:15:36,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:15:36" (1/3) ... [2022-03-20 18:15:36,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413a6f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:15:36, skipping insertion in model container [2022-03-20 18:15:36,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:15:36" (2/3) ... [2022-03-20 18:15:36,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413a6f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:15:36, skipping insertion in model container [2022-03-20 18:15:36,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:15:36" (3/3) ... [2022-03-20 18:15:36,579 INFO L111 eAbstractionObserver]: Analyzing ICFG seq-3.i [2022-03-20 18:15:36,582 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:15:36,582 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:15:36,606 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:15:36,610 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 18:15:36,611 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:15:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:15:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 18:15:36,623 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:36,623 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:36,624 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:36,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1545358454, now seen corresponding path program 1 times [2022-03-20 18:15:36,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:36,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [849432303] [2022-03-20 18:15:36,638 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:15:36,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1545358454, now seen corresponding path program 2 times [2022-03-20 18:15:36,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:36,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310713938] [2022-03-20 18:15:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:36,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:36,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:36,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:36,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310713938] [2022-03-20 18:15:36,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310713938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:36,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:36,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:15:36,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:36,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [849432303] [2022-03-20 18:15:36,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [849432303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:36,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:36,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:15:36,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657398495] [2022-03-20 18:15:36,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:36,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 18:15:36,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:36,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 18:15:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 18:15:36,849 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:36,885 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2022-03-20 18:15:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 18:15:36,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 18:15:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:36,891 INFO L225 Difference]: With dead ends: 41 [2022-03-20 18:15:36,891 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 18:15:36,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 18:15:36,899 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:36,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:15:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 18:15:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-20 18:15:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-03-20 18:15:36,924 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-03-20 18:15:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:36,925 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-03-20 18:15:36,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-03-20 18:15:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 18:15:36,925 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:36,925 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:36,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:15:36,926 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1389492102, now seen corresponding path program 1 times [2022-03-20 18:15:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:36,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [507802749] [2022-03-20 18:15:36,934 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:15:36,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1389492102, now seen corresponding path program 2 times [2022-03-20 18:15:36,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:36,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611938922] [2022-03-20 18:15:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:36,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:37,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:37,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611938922] [2022-03-20 18:15:37,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611938922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:37,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:37,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:37,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:37,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [507802749] [2022-03-20 18:15:37,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [507802749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:37,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:37,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:37,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987251824] [2022-03-20 18:15:37,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:37,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 18:15:37,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:37,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 18:15:37,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-20 18:15:37,071 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:37,214 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-03-20 18:15:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:15:37,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 18:15:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:37,216 INFO L225 Difference]: With dead ends: 40 [2022-03-20 18:15:37,216 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 18:15:37,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-03-20 18:15:37,218 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:37,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 36 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 18:15:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-03-20 18:15:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-20 18:15:37,226 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-03-20 18:15:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:37,226 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-20 18:15:37,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-20 18:15:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 18:15:37,227 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:37,227 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:37,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 18:15:37,227 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1362943620, now seen corresponding path program 1 times [2022-03-20 18:15:37,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:37,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [698721534] [2022-03-20 18:15:37,401 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:37,402 INFO L85 PathProgramCache]: Analyzing trace with hash -997567355, now seen corresponding path program 1 times [2022-03-20 18:15:37,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:37,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256628061] [2022-03-20 18:15:37,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:37,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:37,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:37,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:37,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256628061] [2022-03-20 18:15:37,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256628061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:37,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:37,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:37,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:37,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [698721534] [2022-03-20 18:15:37,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [698721534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:37,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:37,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:37,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770838791] [2022-03-20 18:15:37,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:37,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 18:15:37,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:37,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 18:15:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 18:15:37,497 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:37,587 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-03-20 18:15:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 18:15:37,587 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 18:15:37,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:37,588 INFO L225 Difference]: With dead ends: 42 [2022-03-20 18:15:37,588 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 18:15:37,589 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 18:15:37,589 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:37,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 46 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 18:15:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-03-20 18:15:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-20 18:15:37,595 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2022-03-20 18:15:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:37,595 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-20 18:15:37,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-20 18:15:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 18:15:37,596 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:37,596 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:37,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 18:15:37,596 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:37,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1993397725, now seen corresponding path program 1 times [2022-03-20 18:15:37,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:37,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [910372846] [2022-03-20 18:15:37,781 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:37,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1294119684, now seen corresponding path program 1 times [2022-03-20 18:15:37,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:37,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580804340] [2022-03-20 18:15:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:37,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:37,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:37,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:37,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580804340] [2022-03-20 18:15:37,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580804340] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:37,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:37,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:37,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:37,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [910372846] [2022-03-20 18:15:37,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [910372846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:37,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:37,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:37,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189624192] [2022-03-20 18:15:37,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:37,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 18:15:37,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:37,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 18:15:37,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-20 18:15:37,890 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:38,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:38,022 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-03-20 18:15:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 18:15:38,022 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 18:15:38,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:38,023 INFO L225 Difference]: With dead ends: 42 [2022-03-20 18:15:38,023 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 18:15:38,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-03-20 18:15:38,024 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:38,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 47 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 18:15:38,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-03-20 18:15:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-03-20 18:15:38,029 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-03-20 18:15:38,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:38,029 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-03-20 18:15:38,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-03-20 18:15:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 18:15:38,029 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:38,030 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:38,030 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 18:15:38,030 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:38,030 INFO L85 PathProgramCache]: Analyzing trace with hash 539940678, now seen corresponding path program 2 times [2022-03-20 18:15:38,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:38,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1744480795] [2022-03-20 18:15:38,204 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:38,204 INFO L85 PathProgramCache]: Analyzing trace with hash -423504635, now seen corresponding path program 1 times [2022-03-20 18:15:38,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:38,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420822601] [2022-03-20 18:15:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:38,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:38,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:38,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:38,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420822601] [2022-03-20 18:15:38,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420822601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:38,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:38,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:38,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:38,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1744480795] [2022-03-20 18:15:38,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1744480795] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:38,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:38,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 18:15:38,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152161648] [2022-03-20 18:15:38,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:38,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 18:15:38,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:38,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 18:15:38,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 18:15:38,298 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:38,397 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-03-20 18:15:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:15:38,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 18:15:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:38,398 INFO L225 Difference]: With dead ends: 44 [2022-03-20 18:15:38,398 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 18:15:38,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:15:38,398 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:38,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 46 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 18:15:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-03-20 18:15:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 18:15:38,403 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2022-03-20 18:15:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:38,403 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 18:15:38,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 18:15:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 18:15:38,404 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:38,404 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:38,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 18:15:38,404 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:38,405 INFO L85 PathProgramCache]: Analyzing trace with hash 511200038, now seen corresponding path program 2 times [2022-03-20 18:15:38,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:38,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1918580488] [2022-03-20 18:15:38,534 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:38,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1069526140, now seen corresponding path program 1 times [2022-03-20 18:15:38,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:38,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560228510] [2022-03-20 18:15:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:38,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:38,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:38,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:38,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560228510] [2022-03-20 18:15:38,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560228510] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:38,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:38,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:38,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:38,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1918580488] [2022-03-20 18:15:38,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1918580488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:38,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:38,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 18:15:38,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972592004] [2022-03-20 18:15:38,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:38,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 18:15:38,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:38,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 18:15:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 18:15:38,655 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:38,874 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-03-20 18:15:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 18:15:38,876 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 18:15:38,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:38,877 INFO L225 Difference]: With dead ends: 44 [2022-03-20 18:15:38,877 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 18:15:38,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-03-20 18:15:38,880 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:38,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 46 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 18:15:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-03-20 18:15:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-20 18:15:38,899 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2022-03-20 18:15:38,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:38,900 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-20 18:15:38,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:38,900 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-20 18:15:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 18:15:38,901 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:38,901 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:38,901 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 18:15:38,901 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:38,901 INFO L85 PathProgramCache]: Analyzing trace with hash 796653252, now seen corresponding path program 3 times [2022-03-20 18:15:38,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:38,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [184420874] [2022-03-20 18:15:39,105 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:39,105 INFO L85 PathProgramCache]: Analyzing trace with hash 150558085, now seen corresponding path program 1 times [2022-03-20 18:15:39,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:39,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755283690] [2022-03-20 18:15:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:39,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:39,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:39,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:39,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755283690] [2022-03-20 18:15:39,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755283690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:39,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:39,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:39,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:39,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [184420874] [2022-03-20 18:15:39,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [184420874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:39,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:39,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 18:15:39,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889400518] [2022-03-20 18:15:39,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:39,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 18:15:39,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:39,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 18:15:39,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:15:39,208 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:39,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:39,327 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-03-20 18:15:39,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 18:15:39,327 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-20 18:15:39,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:39,328 INFO L225 Difference]: With dead ends: 46 [2022-03-20 18:15:39,328 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 18:15:39,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:15:39,329 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:39,329 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:39,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 18:15:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-03-20 18:15:39,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-03-20 18:15:39,333 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2022-03-20 18:15:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:39,333 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-03-20 18:15:39,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:39,333 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-03-20 18:15:39,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 18:15:39,333 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:39,333 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:39,333 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 18:15:39,334 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:39,334 INFO L85 PathProgramCache]: Analyzing trace with hash 844319363, now seen corresponding path program 3 times [2022-03-20 18:15:39,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:39,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [500221664] [2022-03-20 18:15:39,460 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash 861795332, now seen corresponding path program 1 times [2022-03-20 18:15:39,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:39,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899566574] [2022-03-20 18:15:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:39,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:39,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:39,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:39,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899566574] [2022-03-20 18:15:39,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899566574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:39,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:39,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:39,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [500221664] [2022-03-20 18:15:39,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [500221664] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:39,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:39,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 18:15:39,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646334964] [2022-03-20 18:15:39,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:39,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 18:15:39,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 18:15:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 18:15:39,558 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:39,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:39,742 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-03-20 18:15:39,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 18:15:39,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-20 18:15:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:39,744 INFO L225 Difference]: With dead ends: 46 [2022-03-20 18:15:39,744 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 18:15:39,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-03-20 18:15:39,744 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:39,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 46 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 18:15:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-03-20 18:15:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-20 18:15:39,749 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 20 [2022-03-20 18:15:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:39,749 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-20 18:15:39,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-20 18:15:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 18:15:39,750 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:39,750 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:39,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 18:15:39,750 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:39,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:39,750 INFO L85 PathProgramCache]: Analyzing trace with hash 164808454, now seen corresponding path program 4 times [2022-03-20 18:15:39,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:39,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1882137867] [2022-03-20 18:15:39,873 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:39,873 INFO L85 PathProgramCache]: Analyzing trace with hash 724620805, now seen corresponding path program 1 times [2022-03-20 18:15:39,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:39,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947621147] [2022-03-20 18:15:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:39,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:39,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:39,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947621147] [2022-03-20 18:15:39,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947621147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:39,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:39,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:40,019 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:40,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1882137867] [2022-03-20 18:15:40,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1882137867] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:40,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:40,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 18:15:40,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812054744] [2022-03-20 18:15:40,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:40,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 18:15:40,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:40,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 18:15:40,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-03-20 18:15:40,022 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:40,167 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-03-20 18:15:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 18:15:40,167 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 18:15:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:40,168 INFO L225 Difference]: With dead ends: 48 [2022-03-20 18:15:40,168 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 18:15:40,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-20 18:15:40,169 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:40,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 56 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 18:15:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2022-03-20 18:15:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-20 18:15:40,173 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2022-03-20 18:15:40,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:40,173 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-20 18:15:40,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:40,173 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-20 18:15:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 18:15:40,174 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:40,174 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:40,174 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 18:15:40,174 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:40,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:40,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1713883450, now seen corresponding path program 4 times [2022-03-20 18:15:40,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:40,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1528554152] [2022-03-20 18:15:40,297 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:40,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1501850492, now seen corresponding path program 1 times [2022-03-20 18:15:40,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:40,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848537173] [2022-03-20 18:15:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:40,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:40,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:40,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:40,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848537173] [2022-03-20 18:15:40,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848537173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:40,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:40,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:40,431 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:40,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1528554152] [2022-03-20 18:15:40,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1528554152] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:40,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:40,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 18:15:40,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126518029] [2022-03-20 18:15:40,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:40,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 18:15:40,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:40,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 18:15:40,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:15:40,433 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:40,599 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-20 18:15:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 18:15:40,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 18:15:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:40,600 INFO L225 Difference]: With dead ends: 48 [2022-03-20 18:15:40,600 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 18:15:40,601 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-03-20 18:15:40,601 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:40,601 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 37 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:40,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 18:15:40,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-03-20 18:15:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-20 18:15:40,605 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 21 [2022-03-20 18:15:40,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:40,605 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-20 18:15:40,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-20 18:15:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 18:15:40,606 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:40,606 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:40,606 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 18:15:40,606 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:40,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2052456196, now seen corresponding path program 5 times [2022-03-20 18:15:40,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:40,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23433997] [2022-03-20 18:15:40,729 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1298683525, now seen corresponding path program 1 times [2022-03-20 18:15:40,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:40,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118774796] [2022-03-20 18:15:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:40,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:40,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:40,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:40,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118774796] [2022-03-20 18:15:40,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118774796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:40,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:40,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:40,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:40,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [23433997] [2022-03-20 18:15:40,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [23433997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:40,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:40,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:15:40,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111626305] [2022-03-20 18:15:40,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:40,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 18:15:40,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 18:15:40,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-03-20 18:15:40,837 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:40,977 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-03-20 18:15:40,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 18:15:40,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-20 18:15:40,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:40,978 INFO L225 Difference]: With dead ends: 50 [2022-03-20 18:15:40,978 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 18:15:40,979 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-03-20 18:15:40,979 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:40,979 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 60 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 18:15:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-03-20 18:15:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-20 18:15:40,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 22 [2022-03-20 18:15:40,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:40,983 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-20 18:15:40,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-20 18:15:40,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 18:15:40,984 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:40,984 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:40,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 18:15:40,984 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash 586207971, now seen corresponding path program 5 times [2022-03-20 18:15:40,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:40,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [720829427] [2022-03-20 18:15:41,080 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:41,080 INFO L85 PathProgramCache]: Analyzing trace with hash 429470980, now seen corresponding path program 1 times [2022-03-20 18:15:41,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:41,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933712219] [2022-03-20 18:15:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:41,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:41,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:41,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:41,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933712219] [2022-03-20 18:15:41,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933712219] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:41,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:41,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:41,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:41,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [720829427] [2022-03-20 18:15:41,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [720829427] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:41,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:41,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:15:41,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439165469] [2022-03-20 18:15:41,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:41,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 18:15:41,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 18:15:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-20 18:15:41,191 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:41,386 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-03-20 18:15:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:15:41,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-20 18:15:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:41,387 INFO L225 Difference]: With dead ends: 50 [2022-03-20 18:15:41,387 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 18:15:41,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-03-20 18:15:41,388 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:41,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 46 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 18:15:41,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2022-03-20 18:15:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-20 18:15:41,392 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 22 [2022-03-20 18:15:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:41,392 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-20 18:15:41,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-20 18:15:41,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 18:15:41,393 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:41,393 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:41,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 18:15:41,393 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:41,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:41,394 INFO L85 PathProgramCache]: Analyzing trace with hash 439994054, now seen corresponding path program 6 times [2022-03-20 18:15:41,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:41,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [175728573] [2022-03-20 18:15:41,464 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:41,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1872746245, now seen corresponding path program 1 times [2022-03-20 18:15:41,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:41,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262762950] [2022-03-20 18:15:41,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:41,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:41,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:41,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:41,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262762950] [2022-03-20 18:15:41,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262762950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:41,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:41,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:41,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:41,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [175728573] [2022-03-20 18:15:41,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [175728573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:41,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:41,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 18:15:41,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72464734] [2022-03-20 18:15:41,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:41,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 18:15:41,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 18:15:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-03-20 18:15:41,609 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:41,784 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-03-20 18:15:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 18:15:41,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 18:15:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:41,784 INFO L225 Difference]: With dead ends: 52 [2022-03-20 18:15:41,785 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 18:15:41,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:15:41,785 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:41,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 66 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 18:15:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2022-03-20 18:15:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-20 18:15:41,789 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 23 [2022-03-20 18:15:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:41,790 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-20 18:15:41,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-20 18:15:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 18:15:41,790 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:41,790 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:41,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 18:15:41,790 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:41,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:41,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1125402010, now seen corresponding path program 6 times [2022-03-20 18:15:41,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:41,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2079770596] [2022-03-20 18:15:41,881 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:41,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1934174844, now seen corresponding path program 1 times [2022-03-20 18:15:41,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:41,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998529207] [2022-03-20 18:15:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:41,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:41,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:41,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:41,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998529207] [2022-03-20 18:15:41,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998529207] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:41,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:41,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:42,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2079770596] [2022-03-20 18:15:42,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2079770596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:42,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:42,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 18:15:42,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142544931] [2022-03-20 18:15:42,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:42,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 18:15:42,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:42,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 18:15:42,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-03-20 18:15:42,025 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:42,247 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-03-20 18:15:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 18:15:42,248 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 18:15:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:42,248 INFO L225 Difference]: With dead ends: 52 [2022-03-20 18:15:42,248 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 18:15:42,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-03-20 18:15:42,249 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:42,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:42,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 18:15:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-03-20 18:15:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-03-20 18:15:42,262 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 23 [2022-03-20 18:15:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:42,263 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-03-20 18:15:42,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-03-20 18:15:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 18:15:42,266 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:42,266 INFO L499 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:42,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 18:15:42,267 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:42,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:42,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1993275204, now seen corresponding path program 7 times [2022-03-20 18:15:42,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:42,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1030914983] [2022-03-20 18:15:42,401 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:42,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1848158331, now seen corresponding path program 1 times [2022-03-20 18:15:42,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:42,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029964952] [2022-03-20 18:15:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:42,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:42,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:42,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:42,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029964952] [2022-03-20 18:15:42,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029964952] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:42,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:42,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:42,577 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:42,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1030914983] [2022-03-20 18:15:42,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1030914983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:42,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:42,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:15:42,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912457841] [2022-03-20 18:15:42,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:42,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:15:42,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:42,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:15:42,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:15:42,579 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:42,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:42,796 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-03-20 18:15:42,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:15:42,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-20 18:15:42,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:42,797 INFO L225 Difference]: With dead ends: 54 [2022-03-20 18:15:42,797 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 18:15:42,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-20 18:15:42,798 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:42,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 71 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 18:15:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2022-03-20 18:15:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-03-20 18:15:42,802 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 24 [2022-03-20 18:15:42,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:42,802 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-03-20 18:15:42,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:42,803 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-03-20 18:15:42,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 18:15:42,803 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:42,803 INFO L499 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:42,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 18:15:42,803 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1649263427, now seen corresponding path program 7 times [2022-03-20 18:15:42,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:42,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1362712101] [2022-03-20 18:15:42,950 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:42,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2853372, now seen corresponding path program 1 times [2022-03-20 18:15:42,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:42,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19666206] [2022-03-20 18:15:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:42,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:42,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:43,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:43,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19666206] [2022-03-20 18:15:43,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19666206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:43,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:43,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:43,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:43,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1362712101] [2022-03-20 18:15:43,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1362712101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:43,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:43,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:15:43,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058135583] [2022-03-20 18:15:43,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:43,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:15:43,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:43,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:15:43,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-20 18:15:43,113 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:43,392 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-03-20 18:15:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:15:43,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-20 18:15:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:43,393 INFO L225 Difference]: With dead ends: 54 [2022-03-20 18:15:43,393 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 18:15:43,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-03-20 18:15:43,393 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:43,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 51 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 18:15:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-03-20 18:15:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-20 18:15:43,398 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2022-03-20 18:15:43,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:43,398 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-20 18:15:43,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:43,398 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-20 18:15:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 18:15:43,399 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:43,399 INFO L499 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:43,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 18:15:43,399 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:43,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:43,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1394616698, now seen corresponding path program 8 times [2022-03-20 18:15:43,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:43,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2001067795] [2022-03-20 18:15:43,529 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:43,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1274095611, now seen corresponding path program 1 times [2022-03-20 18:15:43,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:43,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006958223] [2022-03-20 18:15:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:43,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:43,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:43,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:43,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006958223] [2022-03-20 18:15:43,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006958223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:43,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:43,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:43,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:43,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2001067795] [2022-03-20 18:15:43,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2001067795] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:43,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:43,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:15:43,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394042802] [2022-03-20 18:15:43,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:43,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:15:43,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:43,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:15:43,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-03-20 18:15:43,692 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:43,941 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-03-20 18:15:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 18:15:43,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 18:15:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:43,942 INFO L225 Difference]: With dead ends: 56 [2022-03-20 18:15:43,942 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 18:15:43,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-03-20 18:15:43,943 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:43,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 86 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 18:15:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-03-20 18:15:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-03-20 18:15:43,949 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2022-03-20 18:15:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:43,949 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-03-20 18:15:43,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-03-20 18:15:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 18:15:43,950 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:43,950 INFO L499 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:43,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 18:15:43,950 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:43,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:43,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1764546054, now seen corresponding path program 8 times [2022-03-20 18:15:43,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:43,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [986832363] [2022-03-20 18:15:44,086 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1928468100, now seen corresponding path program 1 times [2022-03-20 18:15:44,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:44,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259175293] [2022-03-20 18:15:44,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:44,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:44,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:44,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:44,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259175293] [2022-03-20 18:15:44,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259175293] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:44,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:44,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:44,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:44,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [986832363] [2022-03-20 18:15:44,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [986832363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:44,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:44,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:15:44,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386089541] [2022-03-20 18:15:44,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:44,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:15:44,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:44,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:15:44,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:15:44,249 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:44,518 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-03-20 18:15:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:15:44,518 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 18:15:44,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:44,518 INFO L225 Difference]: With dead ends: 56 [2022-03-20 18:15:44,519 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 18:15:44,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-03-20 18:15:44,519 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:44,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 62 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 18:15:44,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-03-20 18:15:44,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-03-20 18:15:44,524 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2022-03-20 18:15:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:44,524 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-03-20 18:15:44,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-03-20 18:15:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 18:15:44,524 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:44,524 INFO L499 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:44,524 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 18:15:44,524 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:44,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:44,525 INFO L85 PathProgramCache]: Analyzing trace with hash 954916740, now seen corresponding path program 9 times [2022-03-20 18:15:44,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:44,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1037663603] [2022-03-20 18:15:44,634 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:44,635 INFO L85 PathProgramCache]: Analyzing trace with hash -700032891, now seen corresponding path program 1 times [2022-03-20 18:15:44,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:44,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917919673] [2022-03-20 18:15:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:44,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:44,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:44,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:44,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917919673] [2022-03-20 18:15:44,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917919673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:44,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:44,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:44,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:44,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1037663603] [2022-03-20 18:15:44,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1037663603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:44,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:44,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:15:44,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787001707] [2022-03-20 18:15:44,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:44,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:15:44,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:44,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:15:44,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:15:44,862 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:45,049 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2022-03-20 18:15:45,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:15:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 18:15:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:45,050 INFO L225 Difference]: With dead ends: 58 [2022-03-20 18:15:45,050 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 18:15:45,050 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:15:45,051 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:45,051 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 85 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 18:15:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-03-20 18:15:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-03-20 18:15:45,055 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 26 [2022-03-20 18:15:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:45,055 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-03-20 18:15:45,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-03-20 18:15:45,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 18:15:45,056 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:45,056 INFO L499 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:45,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 18:15:45,056 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:45,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1043340195, now seen corresponding path program 9 times [2022-03-20 18:15:45,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:45,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [445159045] [2022-03-20 18:15:45,121 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:45,122 INFO L85 PathProgramCache]: Analyzing trace with hash -435177724, now seen corresponding path program 1 times [2022-03-20 18:15:45,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:45,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851163560] [2022-03-20 18:15:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:45,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:45,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:45,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:45,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851163560] [2022-03-20 18:15:45,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851163560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:45,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:45,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:45,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:45,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [445159045] [2022-03-20 18:15:45,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [445159045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:45,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:45,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:15:45,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408437956] [2022-03-20 18:15:45,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:45,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:15:45,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:45,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:15:45,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-03-20 18:15:45,256 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:45,486 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-03-20 18:15:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:15:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 18:15:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:45,487 INFO L225 Difference]: With dead ends: 58 [2022-03-20 18:15:45,487 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 18:15:45,487 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-03-20 18:15:45,487 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:45,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 51 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 18:15:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2022-03-20 18:15:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-03-20 18:15:45,493 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 26 [2022-03-20 18:15:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:45,493 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-03-20 18:15:45,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:45,493 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-03-20 18:15:45,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 18:15:45,493 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:45,493 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:45,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 18:15:45,493 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:45,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:45,494 INFO L85 PathProgramCache]: Analyzing trace with hash 776009286, now seen corresponding path program 10 times [2022-03-20 18:15:45,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:45,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1847604928] [2022-03-20 18:15:45,623 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash -125970171, now seen corresponding path program 1 times [2022-03-20 18:15:45,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:45,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385294140] [2022-03-20 18:15:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:45,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:45,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:45,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:45,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385294140] [2022-03-20 18:15:45,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385294140] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:45,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:45,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:45,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:45,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1847604928] [2022-03-20 18:15:45,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1847604928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:45,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:45,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:15:45,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23110964] [2022-03-20 18:15:45,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:45,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:15:45,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:45,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:15:45,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-03-20 18:15:45,806 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:46,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:46,087 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2022-03-20 18:15:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:15:46,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 18:15:46,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:46,088 INFO L225 Difference]: With dead ends: 60 [2022-03-20 18:15:46,088 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 18:15:46,089 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:15:46,089 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:46,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 86 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:46,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 18:15:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-20 18:15:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-03-20 18:15:46,118 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 27 [2022-03-20 18:15:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:46,119 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-03-20 18:15:46,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-03-20 18:15:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 18:15:46,120 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:46,120 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:46,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 18:15:46,120 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:46,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:46,121 INFO L85 PathProgramCache]: Analyzing trace with hash 160795046, now seen corresponding path program 10 times [2022-03-20 18:15:46,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:46,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [218007592] [2022-03-20 18:15:46,265 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:46,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1496143748, now seen corresponding path program 1 times [2022-03-20 18:15:46,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:46,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870071552] [2022-03-20 18:15:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:46,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:46,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:46,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:46,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870071552] [2022-03-20 18:15:46,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870071552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:46,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:46,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:46,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:46,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [218007592] [2022-03-20 18:15:46,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [218007592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:46,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:46,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:15:46,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459222829] [2022-03-20 18:15:46,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:46,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:15:46,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:46,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:15:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:15:46,461 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:46,820 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-03-20 18:15:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 18:15:46,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 18:15:46,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:46,821 INFO L225 Difference]: With dead ends: 60 [2022-03-20 18:15:46,821 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 18:15:46,822 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 18:15:46,822 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:46,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:46,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 18:15:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-03-20 18:15:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-03-20 18:15:46,827 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 27 [2022-03-20 18:15:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:46,827 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-03-20 18:15:46,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-03-20 18:15:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 18:15:46,828 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:46,828 INFO L499 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:46,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 18:15:46,828 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:46,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:46,828 INFO L85 PathProgramCache]: Analyzing trace with hash -475154492, now seen corresponding path program 11 times [2022-03-20 18:15:46,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:46,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2048606415] [2022-03-20 18:15:46,922 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:46,923 INFO L85 PathProgramCache]: Analyzing trace with hash 448092549, now seen corresponding path program 1 times [2022-03-20 18:15:46,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:46,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634396488] [2022-03-20 18:15:46,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:46,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:46,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:46,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:46,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634396488] [2022-03-20 18:15:46,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634396488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:46,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:46,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:47,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:47,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2048606415] [2022-03-20 18:15:47,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2048606415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:47,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:47,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 18:15:47,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287187324] [2022-03-20 18:15:47,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:47,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 18:15:47,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:47,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 18:15:47,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2022-03-20 18:15:47,132 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:47,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:47,476 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-03-20 18:15:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:15:47,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 18:15:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:47,477 INFO L225 Difference]: With dead ends: 62 [2022-03-20 18:15:47,477 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 18:15:47,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:15:47,478 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:47,478 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 91 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:47,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 18:15:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-03-20 18:15:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-03-20 18:15:47,483 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2022-03-20 18:15:47,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:47,483 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-03-20 18:15:47,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-03-20 18:15:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 18:15:47,484 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:47,484 INFO L499 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:47,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 18:15:47,484 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1428300797, now seen corresponding path program 11 times [2022-03-20 18:15:47,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:47,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [124525249] [2022-03-20 18:15:47,615 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:47,616 INFO L85 PathProgramCache]: Analyzing trace with hash -867502076, now seen corresponding path program 1 times [2022-03-20 18:15:47,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:47,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986273151] [2022-03-20 18:15:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:47,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:47,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:47,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:47,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986273151] [2022-03-20 18:15:47,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986273151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:47,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:47,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:47,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:47,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [124525249] [2022-03-20 18:15:47,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [124525249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:47,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:47,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 18:15:47,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401177012] [2022-03-20 18:15:47,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:47,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 18:15:47,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:47,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 18:15:47,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-03-20 18:15:47,836 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:48,182 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-03-20 18:15:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 18:15:48,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 18:15:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:48,183 INFO L225 Difference]: With dead ends: 62 [2022-03-20 18:15:48,183 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 18:15:48,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 18:15:48,184 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:48,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 66 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 18:15:48,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-03-20 18:15:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-03-20 18:15:48,189 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 28 [2022-03-20 18:15:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:48,190 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-03-20 18:15:48,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-03-20 18:15:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 18:15:48,190 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:48,190 INFO L499 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:48,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 18:15:48,190 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:48,190 INFO L85 PathProgramCache]: Analyzing trace with hash -606525946, now seen corresponding path program 12 times [2022-03-20 18:15:48,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:48,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1134531704] [2022-03-20 18:15:48,310 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:48,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1022155269, now seen corresponding path program 1 times [2022-03-20 18:15:48,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:48,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841036550] [2022-03-20 18:15:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:48,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:48,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:48,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:48,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841036550] [2022-03-20 18:15:48,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841036550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:48,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:48,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:48,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:48,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1134531704] [2022-03-20 18:15:48,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1134531704] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:48,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:48,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:15:48,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017589184] [2022-03-20 18:15:48,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:48,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:15:48,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:48,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:15:48,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2022-03-20 18:15:48,498 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:48,803 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-03-20 18:15:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 18:15:48,803 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 18:15:48,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:48,804 INFO L225 Difference]: With dead ends: 64 [2022-03-20 18:15:48,804 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 18:15:48,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:15:48,804 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:48,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 95 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 18:15:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-03-20 18:15:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-03-20 18:15:48,810 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 29 [2022-03-20 18:15:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:48,810 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-03-20 18:15:48,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-03-20 18:15:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 18:15:48,810 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:48,810 INFO L499 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:48,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 18:15:48,811 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:48,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:48,811 INFO L85 PathProgramCache]: Analyzing trace with hash 849335622, now seen corresponding path program 12 times [2022-03-20 18:15:48,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:48,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1713657820] [2022-03-20 18:15:48,902 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:48,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1063819396, now seen corresponding path program 1 times [2022-03-20 18:15:48,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:48,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963117460] [2022-03-20 18:15:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:48,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:48,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:48,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:48,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963117460] [2022-03-20 18:15:48,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963117460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:48,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:48,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:49,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1713657820] [2022-03-20 18:15:49,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1713657820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:49,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:49,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:15:49,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028323264] [2022-03-20 18:15:49,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:49,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:15:49,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:15:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-20 18:15:49,056 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:49,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:49,346 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-03-20 18:15:49,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 18:15:49,347 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 18:15:49,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:49,347 INFO L225 Difference]: With dead ends: 64 [2022-03-20 18:15:49,347 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 18:15:49,347 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:15:49,348 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:49,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 81 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 18:15:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-03-20 18:15:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-03-20 18:15:49,357 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 29 [2022-03-20 18:15:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:49,357 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-03-20 18:15:49,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-03-20 18:15:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 18:15:49,358 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:49,358 INFO L499 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:49,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 18:15:49,358 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:49,358 INFO L85 PathProgramCache]: Analyzing trace with hash -384073724, now seen corresponding path program 13 times [2022-03-20 18:15:49,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:49,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [407564496] [2022-03-20 18:15:49,466 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:49,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1596217989, now seen corresponding path program 1 times [2022-03-20 18:15:49,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:49,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532606568] [2022-03-20 18:15:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:49,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:49,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:49,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:49,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532606568] [2022-03-20 18:15:49,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532606568] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:49,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:49,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:49,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:49,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [407564496] [2022-03-20 18:15:49,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [407564496] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:49,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:49,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:15:49,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270571248] [2022-03-20 18:15:49,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:49,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 18:15:49,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:49,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 18:15:49,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2022-03-20 18:15:49,680 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:49,932 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-03-20 18:15:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 18:15:49,933 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 18:15:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:49,933 INFO L225 Difference]: With dead ends: 66 [2022-03-20 18:15:49,933 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 18:15:49,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:15:49,934 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:49,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 106 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:15:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 18:15:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-03-20 18:15:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-03-20 18:15:49,942 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 30 [2022-03-20 18:15:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:49,942 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-03-20 18:15:49,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-03-20 18:15:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 18:15:49,947 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:49,947 INFO L499 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:49,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 18:15:49,948 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:49,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:49,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1558379421, now seen corresponding path program 13 times [2022-03-20 18:15:49,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:49,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [317018505] [2022-03-20 18:15:50,048 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1299826428, now seen corresponding path program 1 times [2022-03-20 18:15:50,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:50,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038715895] [2022-03-20 18:15:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:50,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:50,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:50,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:50,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038715895] [2022-03-20 18:15:50,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038715895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:50,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:50,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:50,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:50,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [317018505] [2022-03-20 18:15:50,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [317018505] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:50,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:50,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:15:50,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318693014] [2022-03-20 18:15:50,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:50,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 18:15:50,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:50,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 18:15:50,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-20 18:15:50,235 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:50,578 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-03-20 18:15:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 18:15:50,578 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 18:15:50,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:50,579 INFO L225 Difference]: With dead ends: 66 [2022-03-20 18:15:50,579 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 18:15:50,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 18:15:50,579 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:50,580 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 92 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 18:15:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2022-03-20 18:15:50,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-03-20 18:15:50,585 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 30 [2022-03-20 18:15:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:50,586 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-03-20 18:15:50,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-03-20 18:15:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 18:15:50,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:50,587 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:50,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 18:15:50,587 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:50,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2077989434, now seen corresponding path program 14 times [2022-03-20 18:15:50,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:50,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1000447706] [2022-03-20 18:15:50,723 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:50,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2124686587, now seen corresponding path program 1 times [2022-03-20 18:15:50,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:50,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296475123] [2022-03-20 18:15:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:50,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:50,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:50,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:50,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296475123] [2022-03-20 18:15:50,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296475123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:50,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:50,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:50,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:50,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1000447706] [2022-03-20 18:15:50,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1000447706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:50,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:50,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 18:15:50,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891399225] [2022-03-20 18:15:50,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:50,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 18:15:50,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:50,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 18:15:50,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2022-03-20 18:15:50,966 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:51,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:51,253 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-03-20 18:15:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 18:15:51,253 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 18:15:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:51,253 INFO L225 Difference]: With dead ends: 68 [2022-03-20 18:15:51,254 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 18:15:51,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=1435, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:15:51,254 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:51,255 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 110 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 18:15:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-03-20 18:15:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:51,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-03-20 18:15:51,260 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 31 [2022-03-20 18:15:51,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:51,260 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-03-20 18:15:51,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-03-20 18:15:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 18:15:51,261 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:51,261 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:51,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 18:15:51,261 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:51,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1111865574, now seen corresponding path program 14 times [2022-03-20 18:15:51,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:51,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [452527882] [2022-03-20 18:15:51,366 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash 631495044, now seen corresponding path program 1 times [2022-03-20 18:15:51,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:51,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690156080] [2022-03-20 18:15:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:51,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:51,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:51,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:51,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690156080] [2022-03-20 18:15:51,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690156080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:51,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:51,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:51,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:51,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [452527882] [2022-03-20 18:15:51,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [452527882] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:51,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:51,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 18:15:51,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107634305] [2022-03-20 18:15:51,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:51,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 18:15:51,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:51,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 18:15:51,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-03-20 18:15:51,705 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:52,212 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-03-20 18:15:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 18:15:52,212 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 18:15:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:52,212 INFO L225 Difference]: With dead ends: 68 [2022-03-20 18:15:52,213 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 18:15:52,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 18:15:52,214 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:52,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:52,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 18:15:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-03-20 18:15:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-03-20 18:15:52,220 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 31 [2022-03-20 18:15:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:52,220 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-03-20 18:15:52,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-03-20 18:15:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 18:15:52,220 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:52,220 INFO L499 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:52,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 18:15:52,221 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:52,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1245198404, now seen corresponding path program 15 times [2022-03-20 18:15:52,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:52,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1550847327] [2022-03-20 18:15:52,359 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:52,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1550623867, now seen corresponding path program 1 times [2022-03-20 18:15:52,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:52,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115250217] [2022-03-20 18:15:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:52,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:52,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:52,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:52,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115250217] [2022-03-20 18:15:52,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115250217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:52,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:52,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:52,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:52,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1550847327] [2022-03-20 18:15:52,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1550847327] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:52,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:52,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 18:15:52,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414266892] [2022-03-20 18:15:52,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:52,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 18:15:52,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 18:15:52,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:15:52,611 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:52,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:52,944 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-03-20 18:15:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 18:15:52,944 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-20 18:15:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:52,944 INFO L225 Difference]: With dead ends: 70 [2022-03-20 18:15:52,944 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 18:15:52,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=1591, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:15:52,945 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:52,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 110 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:52,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 18:15:52,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-03-20 18:15:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-03-20 18:15:52,952 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 32 [2022-03-20 18:15:52,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:52,952 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-03-20 18:15:52,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:52,952 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-03-20 18:15:52,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 18:15:52,952 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:52,952 INFO L499 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:52,952 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 18:15:52,952 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2009885501, now seen corresponding path program 15 times [2022-03-20 18:15:52,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:52,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [259770942] [2022-03-20 18:15:53,071 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:53,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1732150780, now seen corresponding path program 1 times [2022-03-20 18:15:53,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:53,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467722085] [2022-03-20 18:15:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:53,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:53,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:53,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:53,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467722085] [2022-03-20 18:15:53,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467722085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:53,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:53,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:53,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:53,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [259770942] [2022-03-20 18:15:53,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [259770942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:53,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:53,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 18:15:53,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11106377] [2022-03-20 18:15:53,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:53,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 18:15:53,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:53,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 18:15:53,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-03-20 18:15:53,360 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:53,818 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-03-20 18:15:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 18:15:53,818 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-20 18:15:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:53,819 INFO L225 Difference]: With dead ends: 70 [2022-03-20 18:15:53,819 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 18:15:53,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=1586, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 18:15:53,820 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:53,820 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 96 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 18:15:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2022-03-20 18:15:53,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-20 18:15:53,832 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 32 [2022-03-20 18:15:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:53,833 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-20 18:15:53,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-20 18:15:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 18:15:53,833 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:53,833 INFO L499 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:53,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 18:15:53,833 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:53,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1184806278, now seen corresponding path program 16 times [2022-03-20 18:15:53,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:53,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1192698556] [2022-03-20 18:15:53,935 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:53,935 INFO L85 PathProgramCache]: Analyzing trace with hash -976561147, now seen corresponding path program 1 times [2022-03-20 18:15:53,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:53,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86097525] [2022-03-20 18:15:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:53,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:53,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:53,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:53,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86097525] [2022-03-20 18:15:53,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86097525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:53,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:53,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:54,214 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:54,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1192698556] [2022-03-20 18:15:54,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1192698556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:54,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:54,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 18:15:54,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732745343] [2022-03-20 18:15:54,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:54,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 18:15:54,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:54,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 18:15:54,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2022-03-20 18:15:54,215 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:54,685 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2022-03-20 18:15:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 18:15:54,685 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-20 18:15:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:54,685 INFO L225 Difference]: With dead ends: 72 [2022-03-20 18:15:54,686 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 18:15:54,686 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=1755, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:15:54,686 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:54,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 120 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 18:15:54,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-03-20 18:15:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-03-20 18:15:54,693 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 33 [2022-03-20 18:15:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:54,693 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-03-20 18:15:54,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-03-20 18:15:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 18:15:54,693 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:54,693 INFO L499 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:54,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 18:15:54,694 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:54,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:54,694 INFO L85 PathProgramCache]: Analyzing trace with hash 78982, now seen corresponding path program 16 times [2022-03-20 18:15:54,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:54,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [52712299] [2022-03-20 18:15:54,794 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:54,794 INFO L85 PathProgramCache]: Analyzing trace with hash 199170692, now seen corresponding path program 1 times [2022-03-20 18:15:54,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:54,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719170426] [2022-03-20 18:15:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:54,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:54,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:54,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:54,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719170426] [2022-03-20 18:15:54,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719170426] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:54,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:54,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:55,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [52712299] [2022-03-20 18:15:55,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [52712299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:55,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:55,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 18:15:55,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724211016] [2022-03-20 18:15:55,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:55,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 18:15:55,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:55,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 18:15:55,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:15:55,087 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:55,618 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2022-03-20 18:15:55,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 18:15:55,618 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-20 18:15:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:55,619 INFO L225 Difference]: With dead ends: 72 [2022-03-20 18:15:55,619 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 18:15:55,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 18:15:55,620 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:55,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 47 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 18:15:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2022-03-20 18:15:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-03-20 18:15:55,628 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 33 [2022-03-20 18:15:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:55,628 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-03-20 18:15:55,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-03-20 18:15:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 18:15:55,629 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:55,629 INFO L499 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:55,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 18:15:55,629 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:55,629 INFO L85 PathProgramCache]: Analyzing trace with hash -687349628, now seen corresponding path program 17 times [2022-03-20 18:15:55,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:55,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [531374942] [2022-03-20 18:15:55,701 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:55,702 INFO L85 PathProgramCache]: Analyzing trace with hash -402498427, now seen corresponding path program 1 times [2022-03-20 18:15:55,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:55,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165090846] [2022-03-20 18:15:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:55,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:55,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:55,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:55,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165090846] [2022-03-20 18:15:55,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165090846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:55,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:55,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:55,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:55,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [531374942] [2022-03-20 18:15:55,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [531374942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:55,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:55,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 18:15:55,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217578010] [2022-03-20 18:15:55,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:55,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 18:15:55,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:55,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 18:15:55,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2022-03-20 18:15:55,924 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:56,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:56,268 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2022-03-20 18:15:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 18:15:56,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-20 18:15:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:56,269 INFO L225 Difference]: With dead ends: 74 [2022-03-20 18:15:56,269 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 18:15:56,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=1927, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:15:56,270 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:56,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 120 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:56,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 18:15:56,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-03-20 18:15:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-03-20 18:15:56,278 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 34 [2022-03-20 18:15:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:56,278 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-03-20 18:15:56,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-03-20 18:15:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 18:15:56,279 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:56,279 INFO L499 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:56,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 18:15:56,279 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:56,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2115531485, now seen corresponding path program 17 times [2022-03-20 18:15:56,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:56,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2126787532] [2022-03-20 18:15:56,410 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:56,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2130492164, now seen corresponding path program 1 times [2022-03-20 18:15:56,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:56,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308805998] [2022-03-20 18:15:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:56,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:56,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:56,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:56,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308805998] [2022-03-20 18:15:56,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308805998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:56,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:56,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:56,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:56,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2126787532] [2022-03-20 18:15:56,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2126787532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:56,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:56,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 18:15:56,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727260430] [2022-03-20 18:15:56,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:56,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 18:15:56,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:56,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 18:15:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-03-20 18:15:56,782 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:57,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:57,374 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-03-20 18:15:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 18:15:57,374 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-20 18:15:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:57,375 INFO L225 Difference]: With dead ends: 74 [2022-03-20 18:15:57,375 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 18:15:57,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 18:15:57,376 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:57,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 77 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 18:15:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2022-03-20 18:15:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-03-20 18:15:57,383 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 34 [2022-03-20 18:15:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:57,383 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-03-20 18:15:57,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-03-20 18:15:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 18:15:57,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:57,384 INFO L499 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:57,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 18:15:57,384 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:57,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1405359430, now seen corresponding path program 18 times [2022-03-20 18:15:57,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:57,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [719117323] [2022-03-20 18:15:57,449 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash 171564293, now seen corresponding path program 1 times [2022-03-20 18:15:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:57,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021487369] [2022-03-20 18:15:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:57,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:57,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:57,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021487369] [2022-03-20 18:15:57,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021487369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:57,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:57,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:57,763 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [719117323] [2022-03-20 18:15:57,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [719117323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:57,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:57,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 18:15:57,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776460776] [2022-03-20 18:15:57,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:57,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 18:15:57,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 18:15:57,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=646, Unknown=0, NotChecked=0, Total=702 [2022-03-20 18:15:57,765 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:58,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:58,243 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2022-03-20 18:15:58,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 18:15:58,244 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 18:15:58,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:58,245 INFO L225 Difference]: With dead ends: 76 [2022-03-20 18:15:58,245 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 18:15:58,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=2107, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:15:58,246 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:58,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 126 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 18:15:58,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-03-20 18:15:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-03-20 18:15:58,281 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 35 [2022-03-20 18:15:58,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:58,281 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-03-20 18:15:58,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-03-20 18:15:58,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 18:15:58,282 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:58,282 INFO L499 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:58,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 18:15:58,282 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:58,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:58,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1020020774, now seen corresponding path program 18 times [2022-03-20 18:15:58,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:58,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [500654818] [2022-03-20 18:15:58,390 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:58,390 INFO L85 PathProgramCache]: Analyzing trace with hash -233153660, now seen corresponding path program 1 times [2022-03-20 18:15:58,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:58,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224943343] [2022-03-20 18:15:58,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:58,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:58,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:58,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:58,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224943343] [2022-03-20 18:15:58,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224943343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:58,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:58,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:15:58,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:58,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [500654818] [2022-03-20 18:15:58,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [500654818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:58,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:58,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 18:15:58,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569801156] [2022-03-20 18:15:58,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:58,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 18:15:58,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:58,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 18:15:58,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-20 18:15:58,712 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:59,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:59,243 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-03-20 18:15:59,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 18:15:59,244 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 18:15:59,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:59,245 INFO L225 Difference]: With dead ends: 76 [2022-03-20 18:15:59,245 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 18:15:59,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=2099, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 18:15:59,250 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:59,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 42 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:15:59,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 18:15:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2022-03-20 18:15:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:15:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-03-20 18:15:59,260 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 35 [2022-03-20 18:15:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:59,261 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-03-20 18:15:59,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-03-20 18:15:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 18:15:59,263 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:59,263 INFO L499 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:59,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 18:15:59,264 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:59,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1854830788, now seen corresponding path program 19 times [2022-03-20 18:15:59,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:59,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [512713184] [2022-03-20 18:15:59,386 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:15:59,386 INFO L85 PathProgramCache]: Analyzing trace with hash 745627013, now seen corresponding path program 1 times [2022-03-20 18:15:59,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:59,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540725372] [2022-03-20 18:15:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:59,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:59,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:15:59,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:59,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540725372] [2022-03-20 18:15:59,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540725372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:59,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:59,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:15:59,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:59,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [512713184] [2022-03-20 18:15:59,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [512713184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:59,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:59,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 18:15:59,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149658723] [2022-03-20 18:15:59,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:59,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 18:15:59,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 18:15:59,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2022-03-20 18:15:59,626 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:00,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:00,096 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2022-03-20 18:16:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 18:16:00,096 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-20 18:16:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:00,097 INFO L225 Difference]: With dead ends: 78 [2022-03-20 18:16:00,097 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 18:16:00,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=2295, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 18:16:00,098 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:00,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 141 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:16:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 18:16:00,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-03-20 18:16:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-03-20 18:16:00,107 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 36 [2022-03-20 18:16:00,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:00,107 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-03-20 18:16:00,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:00,107 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-03-20 18:16:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 18:16:00,107 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:00,107 INFO L499 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:00,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 18:16:00,107 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:00,108 INFO L85 PathProgramCache]: Analyzing trace with hash -562107005, now seen corresponding path program 19 times [2022-03-20 18:16:00,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:00,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1559533602] [2022-03-20 18:16:00,249 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:00,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1698167812, now seen corresponding path program 1 times [2022-03-20 18:16:00,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:00,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196654348] [2022-03-20 18:16:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:00,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:00,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:00,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:00,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196654348] [2022-03-20 18:16:00,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196654348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:00,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:00,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:00,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:00,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1559533602] [2022-03-20 18:16:00,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1559533602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:00,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:00,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 18:16:00,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135468833] [2022-03-20 18:16:00,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:00,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 18:16:00,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:00,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 18:16:00,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-20 18:16:00,664 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:01,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:01,474 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-03-20 18:16:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 18:16:01,475 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-20 18:16:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:01,475 INFO L225 Difference]: With dead ends: 78 [2022-03-20 18:16:01,475 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 18:16:01,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=2286, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:16:01,476 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:01,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:16:01,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 18:16:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2022-03-20 18:16:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-20 18:16:01,485 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 36 [2022-03-20 18:16:01,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:01,486 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-20 18:16:01,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:01,486 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-20 18:16:01,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 18:16:01,486 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:01,486 INFO L499 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:01,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 18:16:01,486 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1391426298, now seen corresponding path program 20 times [2022-03-20 18:16:01,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:01,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [89583627] [2022-03-20 18:16:01,590 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:01,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1319689733, now seen corresponding path program 1 times [2022-03-20 18:16:01,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:01,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943428329] [2022-03-20 18:16:01,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:01,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:01,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:01,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:01,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943428329] [2022-03-20 18:16:01,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943428329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:01,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:01,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:01,963 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:01,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [89583627] [2022-03-20 18:16:01,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [89583627] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:01,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:01,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 18:16:01,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711116077] [2022-03-20 18:16:01,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:01,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 18:16:01,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 18:16:01,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=752, Unknown=0, NotChecked=0, Total=812 [2022-03-20 18:16:01,965 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:02,643 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-03-20 18:16:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 18:16:02,644 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 18:16:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:02,645 INFO L225 Difference]: With dead ends: 80 [2022-03-20 18:16:02,645 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 18:16:02,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=2491, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:16:02,646 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:02,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 140 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:16:02,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 18:16:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-03-20 18:16:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-03-20 18:16:02,655 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 37 [2022-03-20 18:16:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:02,655 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-03-20 18:16:02,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-03-20 18:16:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 18:16:02,656 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:02,656 INFO L499 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:02,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 18:16:02,656 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:02,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:02,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1931539398, now seen corresponding path program 20 times [2022-03-20 18:16:02,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:02,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [410118215] [2022-03-20 18:16:02,800 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:02,801 INFO L85 PathProgramCache]: Analyzing trace with hash -665478012, now seen corresponding path program 1 times [2022-03-20 18:16:02,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:02,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549910213] [2022-03-20 18:16:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:02,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:02,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:02,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:02,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549910213] [2022-03-20 18:16:02,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549910213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:02,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:02,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:03,236 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:03,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [410118215] [2022-03-20 18:16:03,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [410118215] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:03,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:03,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 18:16:03,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861930701] [2022-03-20 18:16:03,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:03,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 18:16:03,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:03,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 18:16:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-03-20 18:16:03,238 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:04,079 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-03-20 18:16:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 18:16:04,079 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 18:16:04,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:04,080 INFO L225 Difference]: With dead ends: 80 [2022-03-20 18:16:04,080 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 18:16:04,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=275, Invalid=2481, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 18:16:04,081 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:04,081 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 112 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:16:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 18:16:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2022-03-20 18:16:04,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:04,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-03-20 18:16:04,090 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 37 [2022-03-20 18:16:04,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:04,091 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-03-20 18:16:04,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-03-20 18:16:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 18:16:04,091 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:04,091 INFO L499 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:04,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-20 18:16:04,091 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:04,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:04,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1053819140, now seen corresponding path program 21 times [2022-03-20 18:16:04,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:04,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296170820] [2022-03-20 18:16:04,196 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:04,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1893752453, now seen corresponding path program 1 times [2022-03-20 18:16:04,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:04,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378976844] [2022-03-20 18:16:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:04,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:04,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:04,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:04,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378976844] [2022-03-20 18:16:04,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378976844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:04,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:04,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:04,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:04,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296170820] [2022-03-20 18:16:04,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296170820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:04,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:04,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 18:16:04,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130995371] [2022-03-20 18:16:04,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:04,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 18:16:04,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:04,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 18:16:04,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:16:04,588 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:05,347 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-03-20 18:16:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 18:16:05,348 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-20 18:16:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:05,348 INFO L225 Difference]: With dead ends: 82 [2022-03-20 18:16:05,348 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 18:16:05,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=2695, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 18:16:05,349 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:05,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 140 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:16:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 18:16:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-03-20 18:16:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-03-20 18:16:05,360 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 38 [2022-03-20 18:16:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:05,360 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-03-20 18:16:05,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-03-20 18:16:05,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 18:16:05,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:05,361 INFO L499 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:05,361 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-20 18:16:05,361 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:05,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:05,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1925166563, now seen corresponding path program 21 times [2022-03-20 18:16:05,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:05,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1396067060] [2022-03-20 18:16:05,517 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1265843460, now seen corresponding path program 1 times [2022-03-20 18:16:05,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:05,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521165610] [2022-03-20 18:16:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:05,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:05,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:05,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:05,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521165610] [2022-03-20 18:16:05,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521165610] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:05,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:05,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:05,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:05,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1396067060] [2022-03-20 18:16:05,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1396067060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:05,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:05,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 18:16:05,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329752892] [2022-03-20 18:16:05,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:05,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 18:16:05,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:05,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 18:16:05,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-03-20 18:16:05,856 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:06,768 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2022-03-20 18:16:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 18:16:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-20 18:16:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:06,769 INFO L225 Difference]: With dead ends: 82 [2022-03-20 18:16:06,769 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 18:16:06,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=286, Invalid=2684, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 18:16:06,770 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:06,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 61 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:16:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 18:16:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2022-03-20 18:16:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:06,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-03-20 18:16:06,783 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 38 [2022-03-20 18:16:06,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:06,783 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-03-20 18:16:06,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 28 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-03-20 18:16:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 18:16:06,783 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:06,783 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:06,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-20 18:16:06,784 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -452983610, now seen corresponding path program 22 times [2022-03-20 18:16:06,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:06,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1210155649] [2022-03-20 18:16:06,917 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:06,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1827152123, now seen corresponding path program 1 times [2022-03-20 18:16:06,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:06,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612016492] [2022-03-20 18:16:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:06,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:06,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:06,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:06,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612016492] [2022-03-20 18:16:06,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612016492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:06,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:06,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:07,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:07,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1210155649] [2022-03-20 18:16:07,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1210155649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:07,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:07,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 18:16:07,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129311863] [2022-03-20 18:16:07,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:07,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 18:16:07,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:07,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 18:16:07,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2022-03-20 18:16:07,387 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:08,211 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2022-03-20 18:16:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 18:16:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-20 18:16:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:08,212 INFO L225 Difference]: With dead ends: 84 [2022-03-20 18:16:08,212 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 18:16:08,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=2907, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 18:16:08,213 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:08,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 156 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:16:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 18:16:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2022-03-20 18:16:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-03-20 18:16:08,238 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 39 [2022-03-20 18:16:08,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:08,238 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-03-20 18:16:08,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:08,238 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-03-20 18:16:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 18:16:08,239 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:08,239 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:08,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-20 18:16:08,239 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:08,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:08,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1727608678, now seen corresponding path program 22 times [2022-03-20 18:16:08,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:08,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1871297391] [2022-03-20 18:16:08,379 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:08,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1097802364, now seen corresponding path program 1 times [2022-03-20 18:16:08,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:08,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728631923] [2022-03-20 18:16:08,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:08,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:08,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:08,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:08,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728631923] [2022-03-20 18:16:08,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728631923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:08,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:08,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:08,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:08,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1871297391] [2022-03-20 18:16:08,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1871297391] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:08,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:08,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 18:16:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477075403] [2022-03-20 18:16:08,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:08,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 18:16:08,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:08,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 18:16:08,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:16:08,885 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:09,931 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-03-20 18:16:09,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 18:16:09,933 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-20 18:16:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:09,933 INFO L225 Difference]: With dead ends: 84 [2022-03-20 18:16:09,933 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 18:16:09,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=297, Invalid=2895, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 18:16:09,935 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:09,935 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 51 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:16:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 18:16:09,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2022-03-20 18:16:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-03-20 18:16:09,950 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 39 [2022-03-20 18:16:09,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:09,950 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-03-20 18:16:09,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-03-20 18:16:09,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 18:16:09,951 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:09,951 INFO L499 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:09,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-20 18:16:09,951 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:09,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:09,952 INFO L85 PathProgramCache]: Analyzing trace with hash 80771396, now seen corresponding path program 23 times [2022-03-20 18:16:09,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:09,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [672938175] [2022-03-20 18:16:10,077 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:10,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1253089403, now seen corresponding path program 1 times [2022-03-20 18:16:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:10,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836592564] [2022-03-20 18:16:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:10,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:10,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:10,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:10,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836592564] [2022-03-20 18:16:10,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836592564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:10,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:10,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:10,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:10,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [672938175] [2022-03-20 18:16:10,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [672938175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:10,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:10,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 18:16:10,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777855019] [2022-03-20 18:16:10,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:10,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 18:16:10,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:10,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 18:16:10,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=926, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:16:10,547 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 30 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:11,394 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-03-20 18:16:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 18:16:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 30 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-20 18:16:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:11,395 INFO L225 Difference]: With dead ends: 86 [2022-03-20 18:16:11,395 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 18:16:11,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=3127, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:16:11,396 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:11,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 160 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:16:11,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 18:16:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2022-03-20 18:16:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-03-20 18:16:11,407 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 40 [2022-03-20 18:16:11,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:11,407 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-03-20 18:16:11,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 30 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:11,407 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-03-20 18:16:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 18:16:11,407 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:11,407 INFO L499 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:11,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-20 18:16:11,408 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:11,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:11,408 INFO L85 PathProgramCache]: Analyzing trace with hash -101718461, now seen corresponding path program 23 times [2022-03-20 18:16:11,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:11,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1560312774] [2022-03-20 18:16:11,548 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:11,548 INFO L85 PathProgramCache]: Analyzing trace with hash 833519108, now seen corresponding path program 1 times [2022-03-20 18:16:11,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:11,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897111461] [2022-03-20 18:16:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:11,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:11,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:11,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:11,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897111461] [2022-03-20 18:16:11,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897111461] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:11,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:11,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:12,029 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:12,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1560312774] [2022-03-20 18:16:12,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1560312774] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:12,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:12,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 18:16:12,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073061278] [2022-03-20 18:16:12,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:12,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 18:16:12,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:12,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 18:16:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2022-03-20 18:16:12,031 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 30 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:13,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:13,028 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-03-20 18:16:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 18:16:13,028 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 30 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-20 18:16:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:13,029 INFO L225 Difference]: With dead ends: 86 [2022-03-20 18:16:13,029 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 18:16:13,030 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=3114, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 18:16:13,030 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:13,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 122 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:16:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 18:16:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-03-20 18:16:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:13,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-03-20 18:16:13,041 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 40 [2022-03-20 18:16:13,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:13,041 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-03-20 18:16:13,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 30 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:13,042 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-03-20 18:16:13,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 18:16:13,042 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:13,042 INFO L499 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:13,042 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-20 18:16:13,042 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:13,042 INFO L85 PathProgramCache]: Analyzing trace with hash -552692602, now seen corresponding path program 24 times [2022-03-20 18:16:13,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:13,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1345300881] [2022-03-20 18:16:13,185 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:13,186 INFO L85 PathProgramCache]: Analyzing trace with hash -679026683, now seen corresponding path program 1 times [2022-03-20 18:16:13,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:13,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377537388] [2022-03-20 18:16:13,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:13,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:13,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:13,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:13,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377537388] [2022-03-20 18:16:13,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377537388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:13,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:13,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:13,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:13,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1345300881] [2022-03-20 18:16:13,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1345300881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:13,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:13,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 18:16:13,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605091256] [2022-03-20 18:16:13,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:13,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 18:16:13,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:13,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 18:16:13,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=988, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 18:16:13,702 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 32 states, 32 states have (on average 1.15625) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:14,586 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-03-20 18:16:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 18:16:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-20 18:16:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:14,587 INFO L225 Difference]: With dead ends: 88 [2022-03-20 18:16:14,587 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 18:16:14,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=3355, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 18:16:14,589 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:14,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 160 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:16:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 18:16:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-03-20 18:16:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-03-20 18:16:14,600 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 41 [2022-03-20 18:16:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:14,600 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-03-20 18:16:14,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-03-20 18:16:14,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 18:16:14,600 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:14,600 INFO L499 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:14,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-20 18:16:14,600 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:14,601 INFO L85 PathProgramCache]: Analyzing trace with hash -976284922, now seen corresponding path program 24 times [2022-03-20 18:16:14,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:14,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1621097896] [2022-03-20 18:16:14,737 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:14,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1530126716, now seen corresponding path program 1 times [2022-03-20 18:16:14,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:14,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072879813] [2022-03-20 18:16:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:14,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:14,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:14,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072879813] [2022-03-20 18:16:14,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072879813] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:14,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:14,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:15,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:15,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1621097896] [2022-03-20 18:16:15,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1621097896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:15,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:15,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 18:16:15,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624240517] [2022-03-20 18:16:15,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:15,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 18:16:15,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 18:16:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:16:15,261 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 32 states, 32 states have (on average 1.15625) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:16,265 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-03-20 18:16:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 18:16:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-20 18:16:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:16,266 INFO L225 Difference]: With dead ends: 88 [2022-03-20 18:16:16,267 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 18:16:16,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=319, Invalid=3341, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 18:16:16,267 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:16,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 77 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:16:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 18:16:16,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2022-03-20 18:16:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-03-20 18:16:16,298 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 41 [2022-03-20 18:16:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:16,298 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-03-20 18:16:16,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.15625) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-03-20 18:16:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 18:16:16,298 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:16,299 INFO L499 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:16,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-20 18:16:16,299 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:16,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1284759940, now seen corresponding path program 25 times [2022-03-20 18:16:16,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:16,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1797566195] [2022-03-20 18:16:16,448 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:16,449 INFO L85 PathProgramCache]: Analyzing trace with hash -104963963, now seen corresponding path program 1 times [2022-03-20 18:16:16,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:16,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902830436] [2022-03-20 18:16:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:16,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:16,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:16,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:16,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902830436] [2022-03-20 18:16:16,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902830436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:16,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:16,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:17,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:17,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1797566195] [2022-03-20 18:16:17,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1797566195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:17,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:17,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 18:16:17,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543939145] [2022-03-20 18:16:17,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:17,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 18:16:17,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 18:16:17,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:16:17,204 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:18,273 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-03-20 18:16:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 18:16:18,273 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-20 18:16:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:18,274 INFO L225 Difference]: With dead ends: 90 [2022-03-20 18:16:18,274 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 18:16:18,275 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=191, Invalid=3591, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 18:16:18,275 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:18,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 171 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:16:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 18:16:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-03-20 18:16:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-03-20 18:16:18,289 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 42 [2022-03-20 18:16:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:18,289 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-03-20 18:16:18,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-03-20 18:16:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 18:16:18,289 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:18,289 INFO L499 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:18,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-20 18:16:18,290 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1976925859, now seen corresponding path program 25 times [2022-03-20 18:16:18,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:18,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1002044561] [2022-03-20 18:16:18,429 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash 401194756, now seen corresponding path program 1 times [2022-03-20 18:16:18,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:18,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309202933] [2022-03-20 18:16:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:18,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:18,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:18,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:18,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309202933] [2022-03-20 18:16:18,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309202933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:18,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:18,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:19,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:19,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1002044561] [2022-03-20 18:16:19,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1002044561] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:19,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:19,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 18:16:19,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362675240] [2022-03-20 18:16:19,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:19,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 18:16:19,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:19,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 18:16:19,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 18:16:19,015 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:20,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:20,108 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-03-20 18:16:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 18:16:20,109 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-20 18:16:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:20,110 INFO L225 Difference]: With dead ends: 90 [2022-03-20 18:16:20,110 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 18:16:20,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=330, Invalid=3576, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 18:16:20,111 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:20,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 81 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:16:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 18:16:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2022-03-20 18:16:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-03-20 18:16:20,137 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 42 [2022-03-20 18:16:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:20,138 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-03-20 18:16:20,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-03-20 18:16:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 18:16:20,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:20,138 INFO L499 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:20,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-20 18:16:20,139 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:20,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1883753402, now seen corresponding path program 26 times [2022-03-20 18:16:20,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:20,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1871953853] [2022-03-20 18:16:20,320 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:20,320 INFO L85 PathProgramCache]: Analyzing trace with hash 469098757, now seen corresponding path program 1 times [2022-03-20 18:16:20,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:20,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125689439] [2022-03-20 18:16:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:20,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:20,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:20,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125689439] [2022-03-20 18:16:20,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125689439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:20,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:20,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:20,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:20,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1871953853] [2022-03-20 18:16:20,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1871953853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:20,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:20,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 18:16:20,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204738627] [2022-03-20 18:16:20,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:20,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 18:16:20,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:20,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 18:16:20,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1118, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 18:16:20,844 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:21,854 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-03-20 18:16:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 18:16:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-20 18:16:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:21,855 INFO L225 Difference]: With dead ends: 92 [2022-03-20 18:16:21,855 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 18:16:21,856 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=3835, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:16:21,856 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:21,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 176 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:16:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 18:16:21,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-03-20 18:16:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-03-20 18:16:21,871 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 43 [2022-03-20 18:16:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:21,871 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-03-20 18:16:21,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-03-20 18:16:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 18:16:21,871 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:21,871 INFO L499 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:21,872 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-20 18:16:21,872 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:21,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:21,872 INFO L85 PathProgramCache]: Analyzing trace with hash -962820442, now seen corresponding path program 26 times [2022-03-20 18:16:21,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:21,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1747339405] [2022-03-20 18:16:21,988 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1962451068, now seen corresponding path program 1 times [2022-03-20 18:16:21,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:21,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224290111] [2022-03-20 18:16:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:21,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:22,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:22,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:22,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224290111] [2022-03-20 18:16:22,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224290111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:22,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:22,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:22,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:22,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1747339405] [2022-03-20 18:16:22,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1747339405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:22,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:22,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 18:16:22,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601566310] [2022-03-20 18:16:22,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:22,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 18:16:22,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:22,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 18:16:22,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:16:22,573 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:23,706 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2022-03-20 18:16:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 18:16:23,707 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-20 18:16:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:23,708 INFO L225 Difference]: With dead ends: 92 [2022-03-20 18:16:23,708 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 18:16:23,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=341, Invalid=3819, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 18:16:23,709 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:23,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 77 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:16:23,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 18:16:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2022-03-20 18:16:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-03-20 18:16:23,727 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 43 [2022-03-20 18:16:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:23,728 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-03-20 18:16:23,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-03-20 18:16:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 18:16:23,728 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:23,728 INFO L499 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:23,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-20 18:16:23,729 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:23,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1323419196, now seen corresponding path program 27 times [2022-03-20 18:16:23,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:23,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [838301611] [2022-03-20 18:16:23,900 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:23,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1043161477, now seen corresponding path program 1 times [2022-03-20 18:16:23,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:23,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099164279] [2022-03-20 18:16:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:23,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:23,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:23,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:23,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099164279] [2022-03-20 18:16:23,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099164279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:23,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:23,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:24,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:24,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [838301611] [2022-03-20 18:16:24,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [838301611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:24,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:24,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 18:16:24,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525488001] [2022-03-20 18:16:24,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:24,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 18:16:24,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:24,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 18:16:24,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1186, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:16:24,514 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:25,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:25,655 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-03-20 18:16:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 18:16:25,655 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-20 18:16:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:25,656 INFO L225 Difference]: With dead ends: 94 [2022-03-20 18:16:25,656 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 18:16:25,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=203, Invalid=4087, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 18:16:25,657 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:25,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 171 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:16:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 18:16:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-03-20 18:16:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-03-20 18:16:25,671 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 44 [2022-03-20 18:16:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:25,671 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-03-20 18:16:25,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-03-20 18:16:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 18:16:25,671 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:25,671 INFO L499 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:25,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-20 18:16:25,672 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:25,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:25,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1900642557, now seen corresponding path program 27 times [2022-03-20 18:16:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:25,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1961180068] [2022-03-20 18:16:25,818 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash -31129596, now seen corresponding path program 1 times [2022-03-20 18:16:25,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:25,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522816883] [2022-03-20 18:16:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:25,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:25,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:25,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:25,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522816883] [2022-03-20 18:16:25,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522816883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:25,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:25,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:26,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1961180068] [2022-03-20 18:16:26,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1961180068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:26,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:26,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 18:16:26,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038208174] [2022-03-20 18:16:26,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:26,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 18:16:26,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:26,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 18:16:26,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1094, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 18:16:26,425 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:27,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:27,739 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2022-03-20 18:16:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 18:16:27,741 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-20 18:16:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:27,741 INFO L225 Difference]: With dead ends: 94 [2022-03-20 18:16:27,741 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 18:16:27,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=352, Invalid=4070, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 18:16:27,742 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:27,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 182 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:16:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 18:16:27,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2022-03-20 18:16:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-03-20 18:16:27,757 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 44 [2022-03-20 18:16:27,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:27,757 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-03-20 18:16:27,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-03-20 18:16:27,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 18:16:27,757 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:27,758 INFO L499 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:27,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-20 18:16:27,758 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:27,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:27,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1132927994, now seen corresponding path program 28 times [2022-03-20 18:16:27,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:27,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1279621033] [2022-03-20 18:16:27,865 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:27,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1617224197, now seen corresponding path program 1 times [2022-03-20 18:16:27,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:27,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051866700] [2022-03-20 18:16:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:27,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:27,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:27,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:27,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051866700] [2022-03-20 18:16:27,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051866700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:27,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:27,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:28,492 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:28,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1279621033] [2022-03-20 18:16:28,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1279621033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:28,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:28,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 18:16:28,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474315589] [2022-03-20 18:16:28,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:28,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 18:16:28,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:28,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 18:16:28,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1256, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:16:28,494 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 35 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:29,656 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2022-03-20 18:16:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 18:16:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 35 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-20 18:16:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:29,657 INFO L225 Difference]: With dead ends: 96 [2022-03-20 18:16:29,657 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 18:16:29,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=209, Invalid=4347, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 18:16:29,672 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:29,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 180 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:16:29,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 18:16:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2022-03-20 18:16:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-03-20 18:16:29,686 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 45 [2022-03-20 18:16:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:29,687 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-03-20 18:16:29,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 35 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-03-20 18:16:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 18:16:29,687 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:29,687 INFO L499 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:29,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-20 18:16:29,687 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash -908357050, now seen corresponding path program 28 times [2022-03-20 18:16:29,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:29,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2130078546] [2022-03-20 18:16:29,776 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1900191876, now seen corresponding path program 1 times [2022-03-20 18:16:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:29,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44847637] [2022-03-20 18:16:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:29,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:29,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:29,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:29,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44847637] [2022-03-20 18:16:29,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44847637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:29,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:29,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:30,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:30,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2130078546] [2022-03-20 18:16:30,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2130078546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:30,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:30,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 18:16:30,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680980197] [2022-03-20 18:16:30,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:30,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 18:16:30,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 18:16:30,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:16:30,499 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 35 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:31,781 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2022-03-20 18:16:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 18:16:31,782 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 35 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-20 18:16:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:31,782 INFO L225 Difference]: With dead ends: 96 [2022-03-20 18:16:31,782 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 18:16:31,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=363, Invalid=4329, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 18:16:31,783 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:31,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 97 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:16:31,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 18:16:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2022-03-20 18:16:31,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-03-20 18:16:31,798 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 45 [2022-03-20 18:16:31,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:31,798 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-03-20 18:16:31,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 35 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:31,798 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-03-20 18:16:31,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 18:16:31,799 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:31,799 INFO L499 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:31,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-20 18:16:31,799 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:31,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:31,799 INFO L85 PathProgramCache]: Analyzing trace with hash 477331972, now seen corresponding path program 29 times [2022-03-20 18:16:31,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:31,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1364306338] [2022-03-20 18:16:31,907 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2103680379, now seen corresponding path program 1 times [2022-03-20 18:16:31,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:31,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015568757] [2022-03-20 18:16:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:31,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:31,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:31,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:31,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015568757] [2022-03-20 18:16:31,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015568757] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:31,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:31,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:32,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:32,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1364306338] [2022-03-20 18:16:32,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1364306338] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:32,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:32,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 18:16:32,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778150607] [2022-03-20 18:16:32,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:32,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 18:16:32,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:32,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 18:16:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1328, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:16:32,573 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:33,773 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-03-20 18:16:33,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 18:16:33,773 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-03-20 18:16:33,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:33,774 INFO L225 Difference]: With dead ends: 98 [2022-03-20 18:16:33,774 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 18:16:33,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=4615, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:16:33,775 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:33,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 185 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1617 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:16:33,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 18:16:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2022-03-20 18:16:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-03-20 18:16:33,790 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 46 [2022-03-20 18:16:33,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:33,790 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-03-20 18:16:33,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-03-20 18:16:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 18:16:33,791 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:33,791 INFO L499 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:33,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-20 18:16:33,791 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:33,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:33,791 INFO L85 PathProgramCache]: Analyzing trace with hash -212277405, now seen corresponding path program 29 times [2022-03-20 18:16:33,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:33,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236385493] [2022-03-20 18:16:33,940 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash -463453948, now seen corresponding path program 1 times [2022-03-20 18:16:33,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:33,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82994141] [2022-03-20 18:16:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:33,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:33,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:33,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:33,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82994141] [2022-03-20 18:16:33,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82994141] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:33,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:33,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:34,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236385493] [2022-03-20 18:16:34,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236385493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:34,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:34,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 18:16:34,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053728966] [2022-03-20 18:16:34,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:34,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 18:16:34,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 18:16:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:16:34,637 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:36,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:36,068 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2022-03-20 18:16:36,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 18:16:36,068 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-03-20 18:16:36,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:36,069 INFO L225 Difference]: With dead ends: 98 [2022-03-20 18:16:36,069 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 18:16:36,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=374, Invalid=4596, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 18:16:36,070 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:36,070 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 116 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:16:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 18:16:36,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2022-03-20 18:16:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-03-20 18:16:36,084 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 46 [2022-03-20 18:16:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:36,085 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-03-20 18:16:36,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-03-20 18:16:36,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 18:16:36,085 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:36,085 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:36,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-20 18:16:36,085 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:36,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:36,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1144216634, now seen corresponding path program 30 times [2022-03-20 18:16:36,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:36,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1907492120] [2022-03-20 18:16:36,239 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:36,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1529617659, now seen corresponding path program 1 times [2022-03-20 18:16:36,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:36,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210820210] [2022-03-20 18:16:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:36,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:36,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:36,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:36,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210820210] [2022-03-20 18:16:36,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210820210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:36,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:36,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:36,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:36,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1907492120] [2022-03-20 18:16:36,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1907492120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:36,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:36,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 18:16:36,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062734740] [2022-03-20 18:16:36,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:36,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 18:16:36,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:36,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 18:16:36,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1402, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 18:16:36,921 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:38,269 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2022-03-20 18:16:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 18:16:38,270 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-20 18:16:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:38,271 INFO L225 Difference]: With dead ends: 100 [2022-03-20 18:16:38,271 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 18:16:38,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=221, Invalid=4891, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:16:38,272 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:38,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 196 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:16:38,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 18:16:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-03-20 18:16:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-03-20 18:16:38,287 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 47 [2022-03-20 18:16:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:38,287 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-03-20 18:16:38,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-03-20 18:16:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 18:16:38,288 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:38,288 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:38,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-20 18:16:38,288 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:38,288 INFO L85 PathProgramCache]: Analyzing trace with hash -108644890, now seen corresponding path program 30 times [2022-03-20 18:16:38,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:38,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [232900825] [2022-03-20 18:16:38,397 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:38,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1467867524, now seen corresponding path program 1 times [2022-03-20 18:16:38,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:38,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817342485] [2022-03-20 18:16:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:38,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:38,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:38,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:38,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817342485] [2022-03-20 18:16:38,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817342485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:38,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:38,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:39,225 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:39,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [232900825] [2022-03-20 18:16:39,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [232900825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:39,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:39,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 18:16:39,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194089198] [2022-03-20 18:16:39,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:39,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 18:16:39,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:39,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 18:16:39,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:16:39,226 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:40,870 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2022-03-20 18:16:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 18:16:40,871 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-20 18:16:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:40,872 INFO L225 Difference]: With dead ends: 100 [2022-03-20 18:16:40,872 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 18:16:40,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=385, Invalid=4871, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 18:16:40,873 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:40,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 152 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:16:40,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 18:16:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2022-03-20 18:16:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-03-20 18:16:40,889 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 47 [2022-03-20 18:16:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:40,889 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-03-20 18:16:40,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.131578947368421) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-03-20 18:16:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 18:16:40,889 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:40,889 INFO L499 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:40,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-20 18:16:40,890 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:40,890 INFO L85 PathProgramCache]: Analyzing trace with hash 127384132, now seen corresponding path program 31 times [2022-03-20 18:16:40,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:40,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1025186611] [2022-03-20 18:16:41,007 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:41,007 INFO L85 PathProgramCache]: Analyzing trace with hash -955554939, now seen corresponding path program 1 times [2022-03-20 18:16:41,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:41,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658690030] [2022-03-20 18:16:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:41,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:41,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:41,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:41,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658690030] [2022-03-20 18:16:41,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658690030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:41,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:41,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:41,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:41,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1025186611] [2022-03-20 18:16:41,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1025186611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:41,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:41,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 18:16:41,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144751090] [2022-03-20 18:16:41,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:41,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 18:16:41,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 18:16:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:16:41,765 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 39 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 38 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:43,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:43,223 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-03-20 18:16:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 18:16:43,224 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 38 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-03-20 18:16:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:43,224 INFO L225 Difference]: With dead ends: 102 [2022-03-20 18:16:43,224 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 18:16:43,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=227, Invalid=5175, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 18:16:43,225 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:43,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 191 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:16:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 18:16:43,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2022-03-20 18:16:43,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-03-20 18:16:43,261 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 48 [2022-03-20 18:16:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:43,261 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-03-20 18:16:43,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 38 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-03-20 18:16:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 18:16:43,263 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:43,263 INFO L499 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:43,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-20 18:16:43,263 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:43,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:43,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1191004221, now seen corresponding path program 31 times [2022-03-20 18:16:43,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:43,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [82978786] [2022-03-20 18:16:43,376 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -895778300, now seen corresponding path program 1 times [2022-03-20 18:16:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:43,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412508717] [2022-03-20 18:16:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:43,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:43,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:43,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:43,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412508717] [2022-03-20 18:16:43,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412508717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:43,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:43,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:44,220 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:44,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [82978786] [2022-03-20 18:16:44,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [82978786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:44,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:44,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 18:16:44,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316491730] [2022-03-20 18:16:44,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:44,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 18:16:44,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:44,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 18:16:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 18:16:44,222 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 39 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 38 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:45,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:45,785 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2022-03-20 18:16:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 18:16:45,787 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 38 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-03-20 18:16:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:45,787 INFO L225 Difference]: With dead ends: 102 [2022-03-20 18:16:45,788 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 18:16:45,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=396, Invalid=5154, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 18:16:45,789 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:45,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 91 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:16:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 18:16:45,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-03-20 18:16:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-03-20 18:16:45,813 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 48 [2022-03-20 18:16:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:45,813 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-03-20 18:16:45,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 38 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-03-20 18:16:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 18:16:45,814 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:45,814 INFO L499 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:45,814 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-20 18:16:45,814 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:45,815 INFO L85 PathProgramCache]: Analyzing trace with hash 892302214, now seen corresponding path program 32 times [2022-03-20 18:16:45,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:45,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1859716734] [2022-03-20 18:16:45,994 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:45,995 INFO L85 PathProgramCache]: Analyzing trace with hash -381492219, now seen corresponding path program 1 times [2022-03-20 18:16:45,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:45,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115026156] [2022-03-20 18:16:45,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:45,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:46,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:46,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:46,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115026156] [2022-03-20 18:16:46,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115026156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:46,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:46,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:46,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:46,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1859716734] [2022-03-20 18:16:46,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1859716734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:46,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:46,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 18:16:46,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904905425] [2022-03-20 18:16:46,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:46,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 18:16:46,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:46,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 18:16:46,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1556, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 18:16:46,734 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 40 states, 40 states have (on average 1.125) internal successors, (45), 39 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:48,140 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2022-03-20 18:16:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 18:16:48,141 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.125) internal successors, (45), 39 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-20 18:16:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:48,142 INFO L225 Difference]: With dead ends: 104 [2022-03-20 18:16:48,142 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 18:16:48,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=233, Invalid=5467, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:16:48,143 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:48,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 200 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:16:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 18:16:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-03-20 18:16:48,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-03-20 18:16:48,161 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 49 [2022-03-20 18:16:48,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:48,161 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-03-20 18:16:48,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.125) internal successors, (45), 39 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:48,161 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-03-20 18:16:48,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 18:16:48,161 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:48,162 INFO L499 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:48,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-20 18:16:48,162 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:48,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:48,162 INFO L85 PathProgramCache]: Analyzing trace with hash -384405114, now seen corresponding path program 32 times [2022-03-20 18:16:48,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:48,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [518420402] [2022-03-20 18:16:48,304 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:48,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1035543172, now seen corresponding path program 1 times [2022-03-20 18:16:48,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:48,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151162177] [2022-03-20 18:16:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:48,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:48,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:48,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:48,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151162177] [2022-03-20 18:16:48,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151162177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:48,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:48,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:49,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:49,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [518420402] [2022-03-20 18:16:49,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [518420402] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:49,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:49,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 18:16:49,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505737992] [2022-03-20 18:16:49,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:49,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 18:16:49,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 18:16:49,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:16:49,133 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 40 states, 40 states have (on average 1.125) internal successors, (45), 39 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:50,641 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2022-03-20 18:16:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 18:16:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.125) internal successors, (45), 39 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-20 18:16:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:50,642 INFO L225 Difference]: With dead ends: 104 [2022-03-20 18:16:50,642 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 18:16:50,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=407, Invalid=5445, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 18:16:50,644 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:50,644 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 37 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:16:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 18:16:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2022-03-20 18:16:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-03-20 18:16:50,660 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 49 [2022-03-20 18:16:50,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:50,661 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-03-20 18:16:50,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.125) internal successors, (45), 39 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-03-20 18:16:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 18:16:50,661 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:50,661 INFO L499 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:50,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-20 18:16:50,661 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:50,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1165041020, now seen corresponding path program 33 times [2022-03-20 18:16:50,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:50,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1885943171] [2022-03-20 18:16:50,768 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:50,768 INFO L85 PathProgramCache]: Analyzing trace with hash 192570501, now seen corresponding path program 1 times [2022-03-20 18:16:50,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:50,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169124661] [2022-03-20 18:16:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:50,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:50,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:50,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:50,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169124661] [2022-03-20 18:16:50,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169124661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:50,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:50,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:51,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:51,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1885943171] [2022-03-20 18:16:51,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1885943171] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:51,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:51,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 18:16:51,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441240646] [2022-03-20 18:16:51,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:51,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 18:16:51,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:51,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 18:16:51,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:16:51,544 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 41 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:53,118 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-03-20 18:16:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 18:16:53,119 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-20 18:16:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:53,120 INFO L225 Difference]: With dead ends: 106 [2022-03-20 18:16:53,120 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 18:16:53,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=239, Invalid=5767, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 18:16:53,121 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:53,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 201 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:16:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 18:16:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-03-20 18:16:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-03-20 18:16:53,140 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 50 [2022-03-20 18:16:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:53,140 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-03-20 18:16:53,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-03-20 18:16:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 18:16:53,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:53,141 INFO L499 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:53,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-03-20 18:16:53,141 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:53,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1149636573, now seen corresponding path program 33 times [2022-03-20 18:16:53,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:53,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2059044505] [2022-03-20 18:16:53,249 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1328102652, now seen corresponding path program 1 times [2022-03-20 18:16:53,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:53,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021680661] [2022-03-20 18:16:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:53,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:53,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:53,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:53,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021680661] [2022-03-20 18:16:53,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021680661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:53,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:53,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:54,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:54,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2059044505] [2022-03-20 18:16:54,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2059044505] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:54,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:54,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 18:16:54,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801603340] [2022-03-20 18:16:54,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:54,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 18:16:54,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:54,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 18:16:54,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 18:16:54,286 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 41 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:56,037 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2022-03-20 18:16:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 18:16:56,038 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-20 18:16:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:56,039 INFO L225 Difference]: With dead ends: 106 [2022-03-20 18:16:56,039 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 18:16:56,040 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=418, Invalid=5744, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 18:16:56,040 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:56,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 72 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:16:56,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 18:16:56,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2022-03-20 18:16:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-03-20 18:16:56,060 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 50 [2022-03-20 18:16:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:56,060 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-03-20 18:16:56,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-03-20 18:16:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 18:16:56,060 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:56,061 INFO L499 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:56,061 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-03-20 18:16:56,061 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:56,061 INFO L85 PathProgramCache]: Analyzing trace with hash -518171834, now seen corresponding path program 34 times [2022-03-20 18:16:56,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:56,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [487954762] [2022-03-20 18:16:56,213 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:56,213 INFO L85 PathProgramCache]: Analyzing trace with hash 766633221, now seen corresponding path program 1 times [2022-03-20 18:16:56,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:56,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800568929] [2022-03-20 18:16:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:56,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:56,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:56,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:56,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800568929] [2022-03-20 18:16:56,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800568929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:56,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:56,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:16:57,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:57,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [487954762] [2022-03-20 18:16:57,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [487954762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:57,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:57,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 18:16:57,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287977584] [2022-03-20 18:16:57,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:57,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 18:16:57,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:57,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 18:16:57,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1718, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 18:16:57,058 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 41 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:58,814 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2022-03-20 18:16:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 18:16:58,815 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 41 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-20 18:16:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:58,816 INFO L225 Difference]: With dead ends: 108 [2022-03-20 18:16:58,816 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 18:16:58,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=245, Invalid=6075, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 18:16:58,817 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:58,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 210 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:16:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 18:16:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-03-20 18:16:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-03-20 18:16:58,837 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 51 [2022-03-20 18:16:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:58,837 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-03-20 18:16:58,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 41 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-03-20 18:16:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 18:16:58,838 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:58,838 INFO L499 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:58,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-03-20 18:16:58,838 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:58,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:58,838 INFO L85 PathProgramCache]: Analyzing trace with hash 897991974, now seen corresponding path program 34 times [2022-03-20 18:16:58,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:58,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1560299201] [2022-03-20 18:16:58,947 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:16:58,948 INFO L85 PathProgramCache]: Analyzing trace with hash 603218820, now seen corresponding path program 1 times [2022-03-20 18:16:58,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:58,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976370496] [2022-03-20 18:16:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:58,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:58,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:58,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:58,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976370496] [2022-03-20 18:16:58,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976370496] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:58,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:58,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:59,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:59,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1560299201] [2022-03-20 18:16:59,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1560299201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:59,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:59,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 18:16:59,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118261708] [2022-03-20 18:16:59,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:59,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 18:16:59,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:59,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 18:16:59,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:16:59,873 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 41 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:01,711 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2022-03-20 18:17:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 18:17:01,713 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 41 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-20 18:17:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:01,713 INFO L225 Difference]: With dead ends: 108 [2022-03-20 18:17:01,713 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 18:17:01,714 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=429, Invalid=6051, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 18:17:01,714 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:01,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 107 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1809 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:17:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 18:17:01,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2022-03-20 18:17:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2022-03-20 18:17:01,733 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 51 [2022-03-20 18:17:01,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:01,734 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2022-03-20 18:17:01,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.119047619047619) internal successors, (47), 41 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:01,734 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2022-03-20 18:17:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 18:17:01,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:01,734 INFO L499 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:01,734 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-03-20 18:17:01,734 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:01,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1940063548, now seen corresponding path program 35 times [2022-03-20 18:17:01,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:01,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1623800127] [2022-03-20 18:17:01,846 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:01,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1340695941, now seen corresponding path program 1 times [2022-03-20 18:17:01,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:01,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318284630] [2022-03-20 18:17:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:01,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:01,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:01,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:01,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318284630] [2022-03-20 18:17:01,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318284630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:01,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:01,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:17:02,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:02,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1623800127] [2022-03-20 18:17:02,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1623800127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:02,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:02,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 18:17:02,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072743444] [2022-03-20 18:17:02,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:02,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 18:17:02,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:02,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 18:17:02,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1802, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:17:02,714 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 43 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:04,454 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-03-20 18:17:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 18:17:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-03-20 18:17:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:04,456 INFO L225 Difference]: With dead ends: 110 [2022-03-20 18:17:04,456 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 18:17:04,457 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=251, Invalid=6391, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:17:04,458 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 2200 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:04,458 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 220 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2200 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:17:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 18:17:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-03-20 18:17:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-03-20 18:17:04,476 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 52 [2022-03-20 18:17:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:04,477 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-03-20 18:17:04,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-03-20 18:17:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 18:17:04,477 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:04,477 INFO L499 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:04,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-03-20 18:17:04,477 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash -50032509, now seen corresponding path program 35 times [2022-03-20 18:17:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:04,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1951079847] [2022-03-20 18:17:04,631 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:04,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1760427004, now seen corresponding path program 1 times [2022-03-20 18:17:04,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:04,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489909241] [2022-03-20 18:17:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:04,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:04,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:04,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:04,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489909241] [2022-03-20 18:17:04,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489909241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:04,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:04,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:17:05,615 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:05,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1951079847] [2022-03-20 18:17:05,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1951079847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:05,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:05,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 18:17:05,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110827584] [2022-03-20 18:17:05,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:05,616 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 18:17:05,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:05,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 18:17:05,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1686, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 18:17:05,617 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 43 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:07,689 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2022-03-20 18:17:07,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 18:17:07,690 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-03-20 18:17:07,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:07,691 INFO L225 Difference]: With dead ends: 110 [2022-03-20 18:17:07,691 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 18:17:07,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=440, Invalid=6366, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 18:17:07,692 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:07,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 216 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2120 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:17:07,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 18:17:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2022-03-20 18:17:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-03-20 18:17:07,712 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 52 [2022-03-20 18:17:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:07,712 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-03-20 18:17:07,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-03-20 18:17:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 18:17:07,713 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:07,713 INFO L499 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:07,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-03-20 18:17:07,713 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:07,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1225933574, now seen corresponding path program 36 times [2022-03-20 18:17:07,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:07,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [663530597] [2022-03-20 18:17:07,870 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1914758661, now seen corresponding path program 1 times [2022-03-20 18:17:07,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:07,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171816314] [2022-03-20 18:17:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:07,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:07,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:07,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:07,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171816314] [2022-03-20 18:17:07,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171816314] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:07,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:07,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:17:08,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:08,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [663530597] [2022-03-20 18:17:08,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [663530597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:08,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:08,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 18:17:08,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281686191] [2022-03-20 18:17:08,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:08,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 18:17:08,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:08,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 18:17:08,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1888, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 18:17:08,792 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:10,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:10,637 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-03-20 18:17:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 18:17:10,639 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-20 18:17:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:10,640 INFO L225 Difference]: With dead ends: 112 [2022-03-20 18:17:10,640 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 18:17:10,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=257, Invalid=6715, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 18:17:10,641 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 2286 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:10,641 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 221 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2286 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:17:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 18:17:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-03-20 18:17:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-03-20 18:17:10,672 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 53 [2022-03-20 18:17:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:10,672 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-03-20 18:17:10,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-03-20 18:17:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 18:17:10,673 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:10,673 INFO L499 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:10,673 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-03-20 18:17:10,673 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:10,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:10,674 INFO L85 PathProgramCache]: Analyzing trace with hash 625979590, now seen corresponding path program 36 times [2022-03-20 18:17:10,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:10,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [731215392] [2022-03-20 18:17:10,835 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:10,835 INFO L85 PathProgramCache]: Analyzing trace with hash 170894468, now seen corresponding path program 1 times [2022-03-20 18:17:10,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:10,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713490018] [2022-03-20 18:17:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:10,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:10,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:10,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:10,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713490018] [2022-03-20 18:17:10,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713490018] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:10,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:10,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:17:11,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:11,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [731215392] [2022-03-20 18:17:11,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [731215392] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:11,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:11,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 18:17:11,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422284572] [2022-03-20 18:17:11,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:11,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 18:17:11,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:11,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 18:17:11,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:17:11,728 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:13,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:13,888 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2022-03-20 18:17:13,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 18:17:13,890 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-20 18:17:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:13,890 INFO L225 Difference]: With dead ends: 112 [2022-03-20 18:17:13,890 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 18:17:13,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=451, Invalid=6689, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 18:17:13,891 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:13,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 127 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1984 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:17:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 18:17:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2022-03-20 18:17:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2022-03-20 18:17:13,913 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 53 [2022-03-20 18:17:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:13,914 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2022-03-20 18:17:13,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:13,914 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2022-03-20 18:17:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 18:17:13,914 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:13,914 INFO L499 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:13,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-03-20 18:17:13,914 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:13,915 INFO L85 PathProgramCache]: Analyzing trace with hash 587596548, now seen corresponding path program 37 times [2022-03-20 18:17:13,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:13,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2025534387] [2022-03-20 18:17:14,072 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:14,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1806145915, now seen corresponding path program 1 times [2022-03-20 18:17:14,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:14,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937653376] [2022-03-20 18:17:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:14,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:14,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:14,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:14,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937653376] [2022-03-20 18:17:14,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937653376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:14,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:14,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:17:15,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:15,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2025534387] [2022-03-20 18:17:15,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2025534387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:15,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:15,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 18:17:15,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262996921] [2022-03-20 18:17:15,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:15,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 18:17:15,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:15,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 18:17:15,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1976, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:17:15,019 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 45 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:16,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:16,982 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2022-03-20 18:17:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 18:17:16,983 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-03-20 18:17:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:16,984 INFO L225 Difference]: With dead ends: 114 [2022-03-20 18:17:16,984 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 18:17:16,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=263, Invalid=7047, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 18:17:16,985 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:16,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 220 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2288 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:17:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 18:17:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2022-03-20 18:17:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-03-20 18:17:17,006 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 54 [2022-03-20 18:17:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:17,006 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-03-20 18:17:17,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-03-20 18:17:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 18:17:17,006 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:17,006 INFO L499 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:17,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-03-20 18:17:17,007 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:17,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:17,007 INFO L85 PathProgramCache]: Analyzing trace with hash 107518179, now seen corresponding path program 37 times [2022-03-20 18:17:17,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:17,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1191112699] [2022-03-20 18:17:17,123 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:17,123 INFO L85 PathProgramCache]: Analyzing trace with hash 2102215940, now seen corresponding path program 1 times [2022-03-20 18:17:17,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:17,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224519954] [2022-03-20 18:17:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:17,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:17,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:17,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:17,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224519954] [2022-03-20 18:17:17,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224519954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:17,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:17,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:17:18,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:18,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1191112699] [2022-03-20 18:17:18,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1191112699] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:18,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:18,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 18:17:18,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385744790] [2022-03-20 18:17:18,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:18,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 18:17:18,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:18,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 18:17:18,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1854, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 18:17:18,164 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 45 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:20,127 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2022-03-20 18:17:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 18:17:20,129 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-03-20 18:17:20,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:20,129 INFO L225 Difference]: With dead ends: 114 [2022-03-20 18:17:20,129 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 18:17:20,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=462, Invalid=7020, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 18:17:20,130 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1839 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:20,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 46 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1839 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:17:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 18:17:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2022-03-20 18:17:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-03-20 18:17:20,151 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 54 [2022-03-20 18:17:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:20,152 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-03-20 18:17:20,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-03-20 18:17:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 18:17:20,152 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:20,152 INFO L499 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:20,152 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-03-20 18:17:20,152 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:20,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2020982074, now seen corresponding path program 38 times [2022-03-20 18:17:20,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:20,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1089064144] [2022-03-20 18:17:20,252 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:20,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1232083195, now seen corresponding path program 1 times [2022-03-20 18:17:20,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:20,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500583137] [2022-03-20 18:17:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:20,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:20,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:20,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:20,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500583137] [2022-03-20 18:17:20,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500583137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:20,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:20,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:17:21,418 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:21,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1089064144] [2022-03-20 18:17:21,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1089064144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:21,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:21,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 18:17:21,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303782651] [2022-03-20 18:17:21,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:21,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 18:17:21,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 18:17:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2066, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 18:17:21,420 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 46 states, 46 states have (on average 1.108695652173913) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:23,607 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2022-03-20 18:17:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 18:17:23,608 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.108695652173913) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-20 18:17:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:23,608 INFO L225 Difference]: With dead ends: 116 [2022-03-20 18:17:23,608 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 18:17:23,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=269, Invalid=7387, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:17:23,610 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:23,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 231 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2484 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 18:17:23,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 18:17:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-03-20 18:17:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-03-20 18:17:23,648 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 55 [2022-03-20 18:17:23,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:23,648 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-03-20 18:17:23,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.108695652173913) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:23,648 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-03-20 18:17:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 18:17:23,648 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:23,648 INFO L499 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:23,648 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-03-20 18:17:23,648 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:23,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1215083622, now seen corresponding path program 38 times [2022-03-20 18:17:23,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:23,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843929188] [2022-03-20 18:17:23,755 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:23,755 INFO L85 PathProgramCache]: Analyzing trace with hash -261429884, now seen corresponding path program 1 times [2022-03-20 18:17:23,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:23,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909305476] [2022-03-20 18:17:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:23,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:23,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:23,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:23,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909305476] [2022-03-20 18:17:23,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909305476] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:23,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:23,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:17:27,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:27,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843929188] [2022-03-20 18:17:27,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843929188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:27,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:27,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 18:17:27,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457201205] [2022-03-20 18:17:27,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:27,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 18:17:27,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 18:17:27,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:17:27,084 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 46 states, 46 states have (on average 1.108695652173913) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:29,233 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-03-20 18:17:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 18:17:29,234 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.108695652173913) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-20 18:17:29,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:29,235 INFO L225 Difference]: With dead ends: 116 [2022-03-20 18:17:29,235 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 18:17:29,236 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=473, Invalid=7359, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 18:17:29,236 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:29,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 226 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:17:29,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 18:17:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-03-20 18:17:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-03-20 18:17:29,261 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 55 [2022-03-20 18:17:29,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:29,261 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-03-20 18:17:29,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.108695652173913) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:29,262 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-03-20 18:17:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 18:17:29,262 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:29,262 INFO L499 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:29,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-03-20 18:17:29,262 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:29,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1282540732, now seen corresponding path program 39 times [2022-03-20 18:17:29,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:29,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [183437277] [2022-03-20 18:17:29,342 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:29,343 INFO L85 PathProgramCache]: Analyzing trace with hash -658020475, now seen corresponding path program 1 times [2022-03-20 18:17:29,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:29,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959873827] [2022-03-20 18:17:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:29,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:29,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:29,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:29,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959873827] [2022-03-20 18:17:29,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959873827] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:29,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:29,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:17:30,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:30,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [183437277] [2022-03-20 18:17:30,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [183437277] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:30,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:30,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 18:17:30,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362935995] [2022-03-20 18:17:30,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:30,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 18:17:30,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:30,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 18:17:30,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2158, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:17:30,224 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 47 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 46 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:32,254 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-03-20 18:17:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 18:17:32,256 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 46 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-20 18:17:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:32,256 INFO L225 Difference]: With dead ends: 118 [2022-03-20 18:17:32,256 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 18:17:32,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=275, Invalid=7735, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 18:17:32,258 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:32,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 236 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 18:17:32,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 18:17:32,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-03-20 18:17:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-03-20 18:17:32,306 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 56 [2022-03-20 18:17:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:32,306 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-03-20 18:17:32,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 46 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-03-20 18:17:32,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 18:17:32,307 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:32,307 INFO L499 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:32,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-03-20 18:17:32,307 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:32,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1189873987, now seen corresponding path program 39 times [2022-03-20 18:17:32,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:32,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1961329934] [2022-03-20 18:17:32,431 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:32,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1669891588, now seen corresponding path program 1 times [2022-03-20 18:17:32,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:32,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096693837] [2022-03-20 18:17:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:32,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:32,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:32,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:32,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096693837] [2022-03-20 18:17:32,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096693837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:32,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:32,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:17:33,341 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:33,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1961329934] [2022-03-20 18:17:33,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1961329934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:33,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:33,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 18:17:33,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329227941] [2022-03-20 18:17:33,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:33,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 18:17:33,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:33,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 18:17:33,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2030, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 18:17:33,343 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 47 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 46 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:35,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:35,356 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2022-03-20 18:17:35,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 18:17:35,357 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 46 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-20 18:17:35,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:35,358 INFO L225 Difference]: With dead ends: 118 [2022-03-20 18:17:35,358 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 18:17:35,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=484, Invalid=7706, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 18:17:35,359 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2103 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:35,359 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 62 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2103 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:17:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 18:17:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2022-03-20 18:17:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-03-20 18:17:35,381 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 56 [2022-03-20 18:17:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:35,381 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-03-20 18:17:35,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 46 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-03-20 18:17:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 18:17:35,382 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:35,382 INFO L499 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:35,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-03-20 18:17:35,382 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:35,382 INFO L85 PathProgramCache]: Analyzing trace with hash 134304390, now seen corresponding path program 40 times [2022-03-20 18:17:35,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:35,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [796305585] [2022-03-20 18:17:35,565 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash -83957755, now seen corresponding path program 1 times [2022-03-20 18:17:35,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:35,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743667241] [2022-03-20 18:17:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:35,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:35,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:35,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:35,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743667241] [2022-03-20 18:17:35,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743667241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:35,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:35,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:17:36,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:36,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [796305585] [2022-03-20 18:17:36,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [796305585] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:36,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:36,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 18:17:36,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719648804] [2022-03-20 18:17:36,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:36,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 18:17:36,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:36,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 18:17:36,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2252, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 18:17:36,636 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:38,820 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2022-03-20 18:17:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 18:17:38,822 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-03-20 18:17:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:38,823 INFO L225 Difference]: With dead ends: 120 [2022-03-20 18:17:38,823 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 18:17:38,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=281, Invalid=8091, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 18:17:38,824 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2682 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:38,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 241 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2682 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 18:17:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 18:17:38,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2022-03-20 18:17:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-03-20 18:17:38,868 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 57 [2022-03-20 18:17:38,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:38,868 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-03-20 18:17:38,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-03-20 18:17:38,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 18:17:38,869 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:38,869 INFO L499 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:38,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-03-20 18:17:38,870 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:38,870 INFO L85 PathProgramCache]: Analyzing trace with hash 408375302, now seen corresponding path program 40 times [2022-03-20 18:17:38,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:38,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1273534658] [2022-03-20 18:17:39,119 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:39,119 INFO L85 PathProgramCache]: Analyzing trace with hash -693754236, now seen corresponding path program 1 times [2022-03-20 18:17:39,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:39,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603359902] [2022-03-20 18:17:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:39,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:39,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:39,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:39,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603359902] [2022-03-20 18:17:39,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603359902] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:39,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:39,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:17:40,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:40,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1273534658] [2022-03-20 18:17:40,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1273534658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:40,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:40,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 18:17:40,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023983405] [2022-03-20 18:17:40,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:40,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 18:17:40,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 18:17:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2121, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:17:40,154 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:42,049 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-03-20 18:17:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 18:17:42,050 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-03-20 18:17:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:42,051 INFO L225 Difference]: With dead ends: 120 [2022-03-20 18:17:42,051 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 18:17:42,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=495, Invalid=8061, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 18:17:42,052 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:42,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 206 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2517 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:17:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 18:17:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2022-03-20 18:17:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2022-03-20 18:17:42,075 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 57 [2022-03-20 18:17:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:42,075 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2022-03-20 18:17:42,076 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2022-03-20 18:17:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 18:17:42,076 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:42,076 INFO L499 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:42,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-03-20 18:17:42,076 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:42,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1106830212, now seen corresponding path program 41 times [2022-03-20 18:17:42,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:42,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [538875521] [2022-03-20 18:17:42,214 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:42,214 INFO L85 PathProgramCache]: Analyzing trace with hash 490104965, now seen corresponding path program 1 times [2022-03-20 18:17:42,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:42,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106186092] [2022-03-20 18:17:42,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:42,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:42,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:42,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:42,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106186092] [2022-03-20 18:17:42,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106186092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:42,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:42,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:17:43,417 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:43,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [538875521] [2022-03-20 18:17:43,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [538875521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:43,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:43,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 18:17:43,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911412531] [2022-03-20 18:17:43,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:43,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 18:17:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 18:17:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2348, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 18:17:43,418 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:45,279 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-03-20 18:17:45,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 18:17:45,281 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-03-20 18:17:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:45,281 INFO L225 Difference]: With dead ends: 122 [2022-03-20 18:17:45,281 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 18:17:45,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=287, Invalid=8455, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 18:17:45,282 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 2745 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:45,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 245 Invalid, 2797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2745 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:17:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 18:17:45,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2022-03-20 18:17:45,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-03-20 18:17:45,314 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 58 [2022-03-20 18:17:45,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:45,315 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-03-20 18:17:45,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:45,315 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-03-20 18:17:45,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 18:17:45,315 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:45,315 INFO L499 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:45,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-03-20 18:17:45,315 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:45,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1951719843, now seen corresponding path program 41 times [2022-03-20 18:17:45,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:45,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1676528645] [2022-03-20 18:17:45,430 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:45,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1237567236, now seen corresponding path program 1 times [2022-03-20 18:17:45,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:45,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841757546] [2022-03-20 18:17:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:45,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:45,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:45,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:45,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841757546] [2022-03-20 18:17:45,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841757546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:45,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:45,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:17:46,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:46,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1676528645] [2022-03-20 18:17:46,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1676528645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:46,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:46,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 18:17:46,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990806318] [2022-03-20 18:17:46,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:46,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 18:17:46,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:46,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 18:17:46,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2214, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 18:17:46,638 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:48,614 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2022-03-20 18:17:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 18:17:48,616 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-03-20 18:17:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:48,616 INFO L225 Difference]: With dead ends: 122 [2022-03-20 18:17:48,616 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 18:17:48,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=506, Invalid=8424, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 18:17:48,617 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:48,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 222 Invalid, 2818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2686 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:17:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 18:17:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-03-20 18:17:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:48,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2022-03-20 18:17:48,657 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 58 [2022-03-20 18:17:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:48,657 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2022-03-20 18:17:48,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2022-03-20 18:17:48,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 18:17:48,658 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:48,658 INFO L499 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:48,658 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-03-20 18:17:48,658 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:48,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:48,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1190359622, now seen corresponding path program 42 times [2022-03-20 18:17:48,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:48,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [409318149] [2022-03-20 18:17:48,780 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:48,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1064167685, now seen corresponding path program 1 times [2022-03-20 18:17:48,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:48,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10452427] [2022-03-20 18:17:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:48,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:48,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:48,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:48,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10452427] [2022-03-20 18:17:48,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10452427] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:48,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:48,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:17:49,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:49,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [409318149] [2022-03-20 18:17:49,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [409318149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:49,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:49,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 18:17:49,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938265693] [2022-03-20 18:17:49,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:49,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 18:17:49,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:49,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 18:17:49,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2446, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:17:49,803 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 50 states, 50 states have (on average 1.1) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:51,935 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2022-03-20 18:17:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 18:17:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.1) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-20 18:17:51,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:51,936 INFO L225 Difference]: With dead ends: 124 [2022-03-20 18:17:51,936 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 18:17:51,937 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=293, Invalid=8827, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 18:17:51,937 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 2860 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:51,937 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 250 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2860 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 18:17:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 18:17:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2022-03-20 18:17:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-03-20 18:17:51,961 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 59 [2022-03-20 18:17:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:51,961 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-03-20 18:17:51,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.1) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-03-20 18:17:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 18:17:51,962 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:51,962 INFO L499 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:51,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-03-20 18:17:51,962 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:51,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:51,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1744206938, now seen corresponding path program 42 times [2022-03-20 18:17:51,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:51,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1177604451] [2022-03-20 18:17:52,093 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1126078588, now seen corresponding path program 1 times [2022-03-20 18:17:52,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:52,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816541480] [2022-03-20 18:17:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:52,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:52,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:52,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:52,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816541480] [2022-03-20 18:17:52,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816541480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:52,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:52,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:17:53,164 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:53,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1177604451] [2022-03-20 18:17:53,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1177604451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:53,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:53,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 18:17:53,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872909457] [2022-03-20 18:17:53,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:53,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 18:17:53,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:53,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 18:17:53,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2309, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 18:17:53,165 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 50 states, 50 states have (on average 1.1) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:55,815 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2022-03-20 18:17:55,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 18:17:55,817 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.1) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-20 18:17:55,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:55,818 INFO L225 Difference]: With dead ends: 124 [2022-03-20 18:17:55,818 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 18:17:55,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=517, Invalid=8795, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 18:17:55,819 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2675 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:55,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 167 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2675 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 18:17:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 18:17:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2022-03-20 18:17:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-03-20 18:17:55,844 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 59 [2022-03-20 18:17:55,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:55,844 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-03-20 18:17:55,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.1) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-03-20 18:17:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 18:17:55,845 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:55,845 INFO L499 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:55,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-03-20 18:17:55,845 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:55,845 INFO L85 PathProgramCache]: Analyzing trace with hash -515195964, now seen corresponding path program 43 times [2022-03-20 18:17:55,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:55,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1031278551] [2022-03-20 18:17:55,973 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:55,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1638230405, now seen corresponding path program 1 times [2022-03-20 18:17:55,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:55,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779350355] [2022-03-20 18:17:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:55,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:56,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:56,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:56,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779350355] [2022-03-20 18:17:56,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779350355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:56,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:56,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:17:56,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:56,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1031278551] [2022-03-20 18:17:56,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1031278551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:56,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:56,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 18:17:56,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623706516] [2022-03-20 18:17:56,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:56,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 18:17:56,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:56,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 18:17:56,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2546, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:17:56,930 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 51 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 50 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:59,195 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-03-20 18:17:59,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 18:17:59,196 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 50 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-03-20 18:17:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:59,196 INFO L225 Difference]: With dead ends: 126 [2022-03-20 18:17:59,196 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 18:17:59,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=299, Invalid=9207, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 18:17:59,198 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 3006 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:59,198 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 256 Invalid, 3060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3006 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 18:17:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 18:17:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2022-03-20 18:17:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:17:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-03-20 18:17:59,225 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 60 [2022-03-20 18:17:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:59,225 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-03-20 18:17:59,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 50 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-03-20 18:17:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 18:17:59,226 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:59,226 INFO L499 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:59,226 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-03-20 18:17:59,226 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:59,227 INFO L85 PathProgramCache]: Analyzing trace with hash -353820157, now seen corresponding path program 43 times [2022-03-20 18:17:59,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:59,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1959482132] [2022-03-20 18:17:59,397 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:17:59,397 INFO L85 PathProgramCache]: Analyzing trace with hash 805242884, now seen corresponding path program 1 times [2022-03-20 18:17:59,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:59,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260569227] [2022-03-20 18:17:59,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:59,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:59,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:59,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:59,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260569227] [2022-03-20 18:17:59,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260569227] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:59,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:59,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:18:00,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:00,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1959482132] [2022-03-20 18:18:00,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1959482132] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:00,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:00,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 18:18:00,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199177267] [2022-03-20 18:18:00,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:00,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 18:18:00,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:00,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 18:18:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:18:00,603 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 51 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 50 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:03,148 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2022-03-20 18:18:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 18:18:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 50 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-03-20 18:18:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:03,149 INFO L225 Difference]: With dead ends: 126 [2022-03-20 18:18:03,150 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 18:18:03,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=528, Invalid=9174, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 18:18:03,150 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 2915 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:03,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 251 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2915 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 18:18:03,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 18:18:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2022-03-20 18:18:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-03-20 18:18:03,176 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 60 [2022-03-20 18:18:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:03,177 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-03-20 18:18:03,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 50 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:03,177 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-03-20 18:18:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 18:18:03,195 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:03,195 INFO L499 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:03,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-03-20 18:18:03,196 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:03,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:03,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1847811578, now seen corresponding path program 44 times [2022-03-20 18:18:03,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:03,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390192523] [2022-03-20 18:18:03,281 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:03,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2082674171, now seen corresponding path program 1 times [2022-03-20 18:18:03,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:03,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940919884] [2022-03-20 18:18:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:03,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:03,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:03,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:03,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940919884] [2022-03-20 18:18:03,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940919884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:03,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:03,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:18:04,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:04,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390192523] [2022-03-20 18:18:04,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390192523] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:04,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:04,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 18:18:04,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852819395] [2022-03-20 18:18:04,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:04,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 18:18:04,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:04,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 18:18:04,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2648, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 18:18:04,212 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 52 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:06,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:06,493 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2022-03-20 18:18:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 18:18:06,494 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-20 18:18:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:06,494 INFO L225 Difference]: With dead ends: 128 [2022-03-20 18:18:06,494 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 18:18:06,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=305, Invalid=9595, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 18:18:06,496 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 3136 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 3191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:06,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 265 Invalid, 3191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 18:18:06,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 18:18:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2022-03-20 18:18:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-03-20 18:18:06,522 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 61 [2022-03-20 18:18:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:06,522 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-03-20 18:18:06,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-03-20 18:18:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 18:18:06,522 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:06,522 INFO L499 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:06,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-03-20 18:18:06,523 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:06,523 INFO L85 PathProgramCache]: Analyzing trace with hash -201502906, now seen corresponding path program 44 times [2022-03-20 18:18:06,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:06,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1384955490] [2022-03-20 18:18:06,610 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1558402940, now seen corresponding path program 1 times [2022-03-20 18:18:06,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:06,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746421948] [2022-03-20 18:18:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:06,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:06,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:06,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:06,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746421948] [2022-03-20 18:18:06,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746421948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:06,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:06,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:18:07,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:07,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1384955490] [2022-03-20 18:18:07,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1384955490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:07,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:07,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 18:18:07,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562550228] [2022-03-20 18:18:07,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:07,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 18:18:07,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:07,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 18:18:07,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2505, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:18:07,576 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 52 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:10,110 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2022-03-20 18:18:10,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 18:18:10,112 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-20 18:18:10,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:10,112 INFO L225 Difference]: With dead ends: 128 [2022-03-20 18:18:10,112 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 18:18:10,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=539, Invalid=9561, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 18:18:10,113 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 3025 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 3025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:10,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 256 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 3025 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 18:18:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 18:18:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2022-03-20 18:18:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 106 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:10,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-03-20 18:18:10,140 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 61 [2022-03-20 18:18:10,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:10,140 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-03-20 18:18:10,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:10,140 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-03-20 18:18:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 18:18:10,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:10,141 INFO L499 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:10,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-03-20 18:18:10,141 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:10,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:10,141 INFO L85 PathProgramCache]: Analyzing trace with hash -209222652, now seen corresponding path program 45 times [2022-03-20 18:18:10,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:10,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [300614171] [2022-03-20 18:18:10,268 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:10,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1508611451, now seen corresponding path program 1 times [2022-03-20 18:18:10,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:10,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544583400] [2022-03-20 18:18:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:10,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:10,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:10,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:10,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544583400] [2022-03-20 18:18:10,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544583400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:10,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:10,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:18:11,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:11,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [300614171] [2022-03-20 18:18:11,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [300614171] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:11,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:11,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 18:18:11,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704632152] [2022-03-20 18:18:11,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:11,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 18:18:11,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 18:18:11,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2752, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 18:18:11,228 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 53 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 52 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:13,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:13,331 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2022-03-20 18:18:13,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 18:18:13,333 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 52 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-20 18:18:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:13,334 INFO L225 Difference]: With dead ends: 130 [2022-03-20 18:18:13,334 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 18:18:13,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=311, Invalid=9991, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 18:18:13,335 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 3174 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 3230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:13,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 261 Invalid, 3230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3174 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 18:18:13,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 18:18:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2022-03-20 18:18:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 107 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-03-20 18:18:13,362 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 62 [2022-03-20 18:18:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:13,362 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-03-20 18:18:13,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 52 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-03-20 18:18:13,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 18:18:13,362 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:13,362 INFO L499 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:13,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-03-20 18:18:13,363 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:13,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:13,363 INFO L85 PathProgramCache]: Analyzing trace with hash 225364579, now seen corresponding path program 45 times [2022-03-20 18:18:13,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:13,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1248060784] [2022-03-20 18:18:13,532 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash 372918532, now seen corresponding path program 1 times [2022-03-20 18:18:13,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:13,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715298151] [2022-03-20 18:18:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:13,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:13,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:13,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:13,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715298151] [2022-03-20 18:18:13,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715298151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:13,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:13,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:18:14,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:14,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1248060784] [2022-03-20 18:18:14,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1248060784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:14,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:14,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 18:18:14,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678673420] [2022-03-20 18:18:14,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:14,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 18:18:14,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:14,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 18:18:14,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2606, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 18:18:14,736 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 53 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 52 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:17,154 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2022-03-20 18:18:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 18:18:17,156 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 52 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-20 18:18:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:17,156 INFO L225 Difference]: With dead ends: 130 [2022-03-20 18:18:17,156 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 18:18:17,157 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=550, Invalid=9956, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 18:18:17,157 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3006 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 3150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:17,157 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 211 Invalid, 3150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3006 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 18:18:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 18:18:17,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2022-03-20 18:18:17,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-03-20 18:18:17,184 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 62 [2022-03-20 18:18:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:17,184 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-03-20 18:18:17,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 52 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-03-20 18:18:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 18:18:17,185 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:17,185 INFO L499 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:17,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-03-20 18:18:17,185 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:17,185 INFO L85 PathProgramCache]: Analyzing trace with hash -952573498, now seen corresponding path program 46 times [2022-03-20 18:18:17,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:17,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [482488959] [2022-03-20 18:18:17,337 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:17,337 INFO L85 PathProgramCache]: Analyzing trace with hash -934548731, now seen corresponding path program 1 times [2022-03-20 18:18:17,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:17,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493428706] [2022-03-20 18:18:17,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:17,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:17,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:17,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:17,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493428706] [2022-03-20 18:18:17,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493428706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:17,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:17,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:18:18,301 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:18,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [482488959] [2022-03-20 18:18:18,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [482488959] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:18,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:18,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 18:18:18,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808328991] [2022-03-20 18:18:18,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:18,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 18:18:18,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:18,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 18:18:18,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2858, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 18:18:18,303 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 54 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 53 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:20,893 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2022-03-20 18:18:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 18:18:20,895 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 53 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-03-20 18:18:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:20,897 INFO L225 Difference]: With dead ends: 132 [2022-03-20 18:18:20,897 INFO L226 Difference]: Without dead ends: 120 [2022-03-20 18:18:20,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=317, Invalid=10395, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:18:20,898 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 3289 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:20,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 266 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3289 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 18:18:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-20 18:18:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2022-03-20 18:18:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.036697247706422) internal successors, (113), 109 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-03-20 18:18:20,932 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 63 [2022-03-20 18:18:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:20,932 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-03-20 18:18:20,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 53 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:20,933 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-03-20 18:18:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 18:18:20,933 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:20,933 INFO L499 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:20,933 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-03-20 18:18:20,933 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:20,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:20,933 INFO L85 PathProgramCache]: Analyzing trace with hash 573354726, now seen corresponding path program 46 times [2022-03-20 18:18:20,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:20,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1400418416] [2022-03-20 18:18:21,077 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:21,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1990727292, now seen corresponding path program 1 times [2022-03-20 18:18:21,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:21,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117292102] [2022-03-20 18:18:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:21,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:21,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:21,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:21,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117292102] [2022-03-20 18:18:21,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117292102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:21,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:21,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:18:22,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:22,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1400418416] [2022-03-20 18:18:22,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1400418416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:22,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:22,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 18:18:22,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095263866] [2022-03-20 18:18:22,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:22,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 18:18:22,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:22,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 18:18:22,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 18:18:22,673 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 54 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 53 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:26,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:26,439 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2022-03-20 18:18:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 18:18:26,441 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 53 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-03-20 18:18:26,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:26,442 INFO L225 Difference]: With dead ends: 132 [2022-03-20 18:18:26,442 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 18:18:26,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=561, Invalid=10359, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 18:18:26,443 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 3239 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 3239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:26,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 247 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 3239 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 18:18:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 18:18:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2022-03-20 18:18:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2022-03-20 18:18:26,473 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 63 [2022-03-20 18:18:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:26,474 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2022-03-20 18:18:26,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 53 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2022-03-20 18:18:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 18:18:26,474 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:26,474 INFO L499 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:26,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-03-20 18:18:26,474 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:26,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:26,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1773354052, now seen corresponding path program 47 times [2022-03-20 18:18:26,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:26,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1183299159] [2022-03-20 18:18:26,648 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash -360486011, now seen corresponding path program 1 times [2022-03-20 18:18:26,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:26,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512563825] [2022-03-20 18:18:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:26,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:26,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:26,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:26,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512563825] [2022-03-20 18:18:26,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512563825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:26,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:26,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:18:28,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:28,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1183299159] [2022-03-20 18:18:28,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1183299159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:28,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:28,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 18:18:28,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922840721] [2022-03-20 18:18:28,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:28,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 18:18:28,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 18:18:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2966, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 18:18:28,068 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 55 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 54 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:31,016 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-03-20 18:18:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 18:18:31,016 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 54 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-03-20 18:18:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:31,017 INFO L225 Difference]: With dead ends: 134 [2022-03-20 18:18:31,017 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 18:18:31,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=323, Invalid=10807, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 18:18:31,017 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 3474 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 3532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:31,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 276 Invalid, 3532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3474 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 18:18:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 18:18:31,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2022-03-20 18:18:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 111 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-03-20 18:18:31,049 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 64 [2022-03-20 18:18:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:31,049 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-03-20 18:18:31,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 54 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-03-20 18:18:31,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 18:18:31,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:31,049 INFO L499 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:31,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-03-20 18:18:31,050 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1523852605, now seen corresponding path program 47 times [2022-03-20 18:18:31,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:31,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1077086896] [2022-03-20 18:18:31,175 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:31,175 INFO L85 PathProgramCache]: Analyzing trace with hash -59405820, now seen corresponding path program 1 times [2022-03-20 18:18:31,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:31,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896076456] [2022-03-20 18:18:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:31,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:31,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:31,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896076456] [2022-03-20 18:18:31,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896076456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:31,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:31,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:18:32,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:32,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1077086896] [2022-03-20 18:18:32,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1077086896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:32,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:32,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 18:18:32,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132601611] [2022-03-20 18:18:32,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:32,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 18:18:32,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:32,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 18:18:32,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2814, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 18:18:32,380 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 55 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 54 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:35,471 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2022-03-20 18:18:35,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 18:18:35,473 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 54 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-03-20 18:18:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:35,473 INFO L225 Difference]: With dead ends: 134 [2022-03-20 18:18:35,473 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 18:18:35,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=572, Invalid=10770, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 18:18:35,475 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 3386 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 3386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:35,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 242 Invalid, 3536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 3386 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 18:18:35,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 18:18:35,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2022-03-20 18:18:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-03-20 18:18:35,510 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 64 [2022-03-20 18:18:35,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:35,510 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-03-20 18:18:35,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 54 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:35,510 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-03-20 18:18:35,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 18:18:35,514 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:35,514 INFO L499 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:35,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-03-20 18:18:35,514 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:35,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash 377762182, now seen corresponding path program 48 times [2022-03-20 18:18:35,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:35,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [261153030] [2022-03-20 18:18:35,604 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:35,604 INFO L85 PathProgramCache]: Analyzing trace with hash 213576709, now seen corresponding path program 1 times [2022-03-20 18:18:35,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:35,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754952341] [2022-03-20 18:18:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:35,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:35,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:35,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:35,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754952341] [2022-03-20 18:18:35,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754952341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:35,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:35,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:18:36,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:36,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [261153030] [2022-03-20 18:18:36,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [261153030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:36,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:36,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 18:18:36,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204671679] [2022-03-20 18:18:36,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:36,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 18:18:36,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:36,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 18:18:36,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3076, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 18:18:36,986 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 56 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:40,267 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2022-03-20 18:18:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 18:18:40,269 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-20 18:18:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:40,270 INFO L225 Difference]: With dead ends: 136 [2022-03-20 18:18:40,270 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 18:18:40,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=329, Invalid=11227, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 18:18:40,271 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 3536 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 3595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:40,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 280 Invalid, 3595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3536 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 18:18:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 18:18:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2022-03-20 18:18:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 113 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2022-03-20 18:18:40,309 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 65 [2022-03-20 18:18:40,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:40,309 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2022-03-20 18:18:40,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2022-03-20 18:18:40,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 18:18:40,310 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:40,310 INFO L499 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:40,310 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-03-20 18:18:40,310 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:40,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:40,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2112770426, now seen corresponding path program 48 times [2022-03-20 18:18:40,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:40,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1072938097] [2022-03-20 18:18:40,600 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:40,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1871915652, now seen corresponding path program 1 times [2022-03-20 18:18:40,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:40,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634758501] [2022-03-20 18:18:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:40,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:40,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:40,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:40,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634758501] [2022-03-20 18:18:40,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634758501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:40,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:40,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:18:42,251 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:42,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1072938097] [2022-03-20 18:18:42,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1072938097] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:42,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:42,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 18:18:42,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505442710] [2022-03-20 18:18:42,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:42,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 18:18:42,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:42,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 18:18:42,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2921, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 18:18:42,252 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 56 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:45,968 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2022-03-20 18:18:45,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 18:18:45,971 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-20 18:18:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:45,971 INFO L225 Difference]: With dead ends: 136 [2022-03-20 18:18:45,971 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 18:18:45,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=583, Invalid=11189, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 18:18:45,972 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 3474 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 3474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:45,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 251 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 3474 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 18:18:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 18:18:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2022-03-20 18:18:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-03-20 18:18:46,003 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 65 [2022-03-20 18:18:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:46,004 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-03-20 18:18:46,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:46,004 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-03-20 18:18:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 18:18:46,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:46,004 INFO L499 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:46,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-03-20 18:18:46,004 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:46,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:46,004 INFO L85 PathProgramCache]: Analyzing trace with hash 64087172, now seen corresponding path program 49 times [2022-03-20 18:18:46,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:46,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [226125980] [2022-03-20 18:18:46,140 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash 787639429, now seen corresponding path program 1 times [2022-03-20 18:18:46,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:46,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864392712] [2022-03-20 18:18:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:46,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:46,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:46,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:46,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864392712] [2022-03-20 18:18:46,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864392712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:46,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:46,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:18:47,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:47,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [226125980] [2022-03-20 18:18:47,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [226125980] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:47,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:47,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 18:18:47,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483520451] [2022-03-20 18:18:47,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:47,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 18:18:47,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:47,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 18:18:47,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:18:47,714 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 57 states, 57 states have (on average 1.087719298245614) internal successors, (62), 56 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:50,964 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2022-03-20 18:18:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 18:18:50,964 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.087719298245614) internal successors, (62), 56 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-03-20 18:18:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:50,965 INFO L225 Difference]: With dead ends: 138 [2022-03-20 18:18:50,965 INFO L226 Difference]: Without dead ends: 126 [2022-03-20 18:18:50,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=335, Invalid=11655, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 18:18:50,966 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3726 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 3786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:50,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 290 Invalid, 3786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3726 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 18:18:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-20 18:18:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2022-03-20 18:18:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 115 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:51,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-03-20 18:18:51,003 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 66 [2022-03-20 18:18:51,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:51,003 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-03-20 18:18:51,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.087719298245614) internal successors, (62), 56 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:51,004 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-03-20 18:18:51,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 18:18:51,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:51,004 INFO L499 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:51,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-03-20 18:18:51,004 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:51,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:51,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1105613603, now seen corresponding path program 49 times [2022-03-20 18:18:51,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:51,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [997277530] [2022-03-20 18:18:51,134 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:51,135 INFO L85 PathProgramCache]: Analyzing trace with hash -491730172, now seen corresponding path program 1 times [2022-03-20 18:18:51,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:51,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996499790] [2022-03-20 18:18:51,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:51,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:51,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:51,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:51,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996499790] [2022-03-20 18:18:51,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996499790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:51,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:51,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:18:52,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:52,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [997277530] [2022-03-20 18:18:52,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [997277530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:52,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:52,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 18:18:52,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70464743] [2022-03-20 18:18:52,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:52,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 18:18:52,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:52,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 18:18:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=3030, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 18:18:52,480 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 57 states, 57 states have (on average 1.087719298245614) internal successors, (62), 56 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:56,192 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2022-03-20 18:18:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 18:18:56,195 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.087719298245614) internal successors, (62), 56 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-03-20 18:18:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:56,196 INFO L225 Difference]: With dead ends: 138 [2022-03-20 18:18:56,196 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 18:18:56,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=594, Invalid=11616, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 18:18:56,197 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3500 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 3656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 3500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:56,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 207 Invalid, 3656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 3500 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 18:18:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 18:18:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2022-03-20 18:18:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:18:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-03-20 18:18:56,242 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 66 [2022-03-20 18:18:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:56,242 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-03-20 18:18:56,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.087719298245614) internal successors, (62), 56 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-03-20 18:18:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 18:18:56,244 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:56,244 INFO L499 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:56,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-03-20 18:18:56,244 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1069903546, now seen corresponding path program 50 times [2022-03-20 18:18:56,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:56,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2064618061] [2022-03-20 18:18:56,416 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:18:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1361702149, now seen corresponding path program 1 times [2022-03-20 18:18:56,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:56,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715711081] [2022-03-20 18:18:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:56,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:56,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:56,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:56,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715711081] [2022-03-20 18:18:56,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715711081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:56,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:56,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:18:58,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:58,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2064618061] [2022-03-20 18:18:58,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2064618061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:58,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:58,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 18:18:58,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133020281] [2022-03-20 18:18:58,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:58,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 18:18:58,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 18:18:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3302, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 18:18:58,076 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 58 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 57 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:01,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:01,897 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2022-03-20 18:19:01,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 18:19:01,900 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 57 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-03-20 18:19:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:01,900 INFO L225 Difference]: With dead ends: 140 [2022-03-20 18:19:01,900 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 18:19:01,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=341, Invalid=12091, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 18:19:01,902 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 3718 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:01,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 285 Invalid, 3779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3718 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 18:19:01,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 18:19:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-03-20 18:19:01,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 117 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:19:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-03-20 18:19:01,937 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 67 [2022-03-20 18:19:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:01,937 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-03-20 18:19:01,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 57 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-03-20 18:19:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 18:19:01,938 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:01,938 INFO L499 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:01,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-03-20 18:19:01,938 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:01,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:01,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2091270694, now seen corresponding path program 50 times [2022-03-20 18:19:01,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:01,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005070945] [2022-03-20 18:19:02,070 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:19:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1439591300, now seen corresponding path program 1 times [2022-03-20 18:19:02,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:02,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258313987] [2022-03-20 18:19:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:02,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:02,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:02,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:02,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258313987] [2022-03-20 18:19:02,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258313987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:02,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:02,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:19:03,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:03,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005070945] [2022-03-20 18:19:03,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005070945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:03,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:03,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 18:19:03,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629243998] [2022-03-20 18:19:03,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:03,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 18:19:03,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 18:19:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3141, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:19:03,640 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 58 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 57 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:06,783 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2022-03-20 18:19:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 18:19:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 57 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-03-20 18:19:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:06,787 INFO L225 Difference]: With dead ends: 140 [2022-03-20 18:19:06,787 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 18:19:06,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=605, Invalid=12051, Unknown=0, NotChecked=0, Total=12656 [2022-03-20 18:19:06,788 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3159 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 3318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 3159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:06,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 3318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 3159 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 18:19:06,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 18:19:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-03-20 18:19:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 118 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:19:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-03-20 18:19:06,869 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 67 [2022-03-20 18:19:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:06,869 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-03-20 18:19:06,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 57 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-03-20 18:19:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 18:19:06,869 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:06,869 INFO L499 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:06,870 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-03-20 18:19:06,870 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:06,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1863877436, now seen corresponding path program 51 times [2022-03-20 18:19:06,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:06,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [437512015] [2022-03-20 18:19:07,012 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:19:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1935764869, now seen corresponding path program 1 times [2022-03-20 18:19:07,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:07,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673237147] [2022-03-20 18:19:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:07,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:07,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:07,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:07,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673237147] [2022-03-20 18:19:07,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673237147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:07,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:07,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:19:08,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:08,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [437512015] [2022-03-20 18:19:08,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [437512015] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:08,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:08,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 18:19:08,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113533903] [2022-03-20 18:19:08,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:08,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 18:19:08,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:08,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 18:19:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3418, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 18:19:08,235 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 59 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 58 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:11,429 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2022-03-20 18:19:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 18:19:11,431 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 58 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 18:19:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:11,432 INFO L225 Difference]: With dead ends: 142 [2022-03-20 18:19:11,432 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 18:19:11,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=347, Invalid=12535, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 18:19:11,433 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3894 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 3956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:11,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 291 Invalid, 3956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3894 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 18:19:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 18:19:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-03-20 18:19:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 119 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:19:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-03-20 18:19:11,466 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 68 [2022-03-20 18:19:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:11,466 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-03-20 18:19:11,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 58 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-03-20 18:19:11,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 18:19:11,466 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:11,467 INFO L499 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:11,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-03-20 18:19:11,467 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:11,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:11,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1713097853, now seen corresponding path program 51 times [2022-03-20 18:19:11,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:11,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1557258986] [2022-03-20 18:19:11,618 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:19:11,618 INFO L85 PathProgramCache]: Analyzing trace with hash -924054524, now seen corresponding path program 1 times [2022-03-20 18:19:11,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:11,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292938223] [2022-03-20 18:19:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:11,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:11,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:11,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:11,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292938223] [2022-03-20 18:19:11,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292938223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:11,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:11,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:19:12,944 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:12,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1557258986] [2022-03-20 18:19:12,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1557258986] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:12,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:12,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 18:19:12,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444825098] [2022-03-20 18:19:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:12,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 18:19:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 18:19:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3254, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 18:19:12,945 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 59 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 58 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:16,590 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2022-03-20 18:19:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 18:19:16,591 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 58 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 18:19:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:16,591 INFO L225 Difference]: With dead ends: 142 [2022-03-20 18:19:16,591 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 18:19:16,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=616, Invalid=12494, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 18:19:16,593 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3910 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 4072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:16,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 291 Invalid, 4072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3910 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 18:19:16,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 18:19:16,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2022-03-20 18:19:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:19:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-03-20 18:19:16,630 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 68 [2022-03-20 18:19:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:16,630 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-03-20 18:19:16,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 58 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-03-20 18:19:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 18:19:16,634 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:16,634 INFO L499 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:16,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-03-20 18:19:16,634 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:16,634 INFO L85 PathProgramCache]: Analyzing trace with hash -707264250, now seen corresponding path program 52 times [2022-03-20 18:19:16,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:16,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [85569384] [2022-03-20 18:19:16,729 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:19:16,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1785139707, now seen corresponding path program 1 times [2022-03-20 18:19:16,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:16,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604110791] [2022-03-20 18:19:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:16,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:16,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:16,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:16,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604110791] [2022-03-20 18:19:16,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604110791] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:16,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:16,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:19:18,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:18,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [85569384] [2022-03-20 18:19:18,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [85569384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:18,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:18,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 18:19:18,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039194137] [2022-03-20 18:19:18,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:18,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 18:19:18,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:18,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 18:19:18,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3536, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 18:19:18,509 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 60 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:22,577 INFO L93 Difference]: Finished difference Result 144 states and 151 transitions. [2022-03-20 18:19:22,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 18:19:22,580 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-20 18:19:22,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:22,581 INFO L225 Difference]: With dead ends: 144 [2022-03-20 18:19:22,581 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 18:19:22,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1862 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=353, Invalid=12987, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 18:19:22,582 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 4021 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 4084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:22,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 296 Invalid, 4084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4021 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 18:19:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 18:19:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2022-03-20 18:19:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 121 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:19:22,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-03-20 18:19:22,619 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 69 [2022-03-20 18:19:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:22,619 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-03-20 18:19:22,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-03-20 18:19:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 18:19:22,619 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:22,620 INFO L499 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:22,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-03-20 18:19:22,620 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash 610561478, now seen corresponding path program 52 times [2022-03-20 18:19:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:22,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [420392564] [2022-03-20 18:19:22,805 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:19:22,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1007266948, now seen corresponding path program 1 times [2022-03-20 18:19:22,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:22,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717125256] [2022-03-20 18:19:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:22,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:22,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:22,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:22,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717125256] [2022-03-20 18:19:22,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717125256] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:22,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:22,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:19:24,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [420392564] [2022-03-20 18:19:24,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [420392564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:24,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:24,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 18:19:24,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489881706] [2022-03-20 18:19:24,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:24,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 18:19:24,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:24,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 18:19:24,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3369, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 18:19:24,550 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 60 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:28,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:28,761 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2022-03-20 18:19:28,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 18:19:28,762 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-20 18:19:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:28,763 INFO L225 Difference]: With dead ends: 144 [2022-03-20 18:19:28,763 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 18:19:28,763 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=627, Invalid=12945, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 18:19:28,764 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3842 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 4007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:28,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 221 Invalid, 4007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3842 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 18:19:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 18:19:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2022-03-20 18:19:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:19:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2022-03-20 18:19:28,843 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 69 [2022-03-20 18:19:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:28,843 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2022-03-20 18:19:28,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2022-03-20 18:19:28,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 18:19:28,844 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:28,844 INFO L499 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:28,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-03-20 18:19:28,844 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:28,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:28,844 INFO L85 PathProgramCache]: Analyzing trace with hash 788006148, now seen corresponding path program 53 times [2022-03-20 18:19:28,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:28,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1312270023] [2022-03-20 18:19:29,039 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:19:29,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1211076987, now seen corresponding path program 1 times [2022-03-20 18:19:29,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:29,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558327717] [2022-03-20 18:19:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:29,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:29,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:29,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:29,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558327717] [2022-03-20 18:19:29,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558327717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:29,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:29,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:19:30,868 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:30,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1312270023] [2022-03-20 18:19:30,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1312270023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:30,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:30,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 18:19:30,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508636121] [2022-03-20 18:19:30,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:30,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 18:19:30,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:30,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 18:19:30,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3656, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 18:19:30,870 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 61 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 60 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:34,870 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2022-03-20 18:19:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 18:19:34,873 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 60 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-03-20 18:19:34,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:34,873 INFO L225 Difference]: With dead ends: 146 [2022-03-20 18:19:34,873 INFO L226 Difference]: Without dead ends: 134 [2022-03-20 18:19:34,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=359, Invalid=13447, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 18:19:34,874 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 4161 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 4225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:34,874 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 305 Invalid, 4225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4161 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 18:19:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-20 18:19:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2022-03-20 18:19:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:19:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-03-20 18:19:34,912 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 70 [2022-03-20 18:19:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:34,912 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-03-20 18:19:34,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 60 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:34,912 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-03-20 18:19:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 18:19:34,912 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:34,912 INFO L499 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:34,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-03-20 18:19:34,912 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash -370443293, now seen corresponding path program 53 times [2022-03-20 18:19:34,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:34,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725019943] [2022-03-20 18:19:35,050 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:19:35,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1356378876, now seen corresponding path program 1 times [2022-03-20 18:19:35,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:35,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258592124] [2022-03-20 18:19:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:35,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:35,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:35,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:35,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258592124] [2022-03-20 18:19:35,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258592124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:35,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:35,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:19:36,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:36,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725019943] [2022-03-20 18:19:36,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725019943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:36,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:36,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 18:19:36,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876871528] [2022-03-20 18:19:36,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:36,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 18:19:36,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:36,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 18:19:36,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3486, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 18:19:36,898 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 61 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 60 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:41,669 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2022-03-20 18:19:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 18:19:41,672 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 60 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-03-20 18:19:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:41,672 INFO L225 Difference]: With dead ends: 146 [2022-03-20 18:19:41,672 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 18:19:41,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=638, Invalid=13404, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 18:19:41,673 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3456 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 3624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 3456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:41,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 52 Invalid, 3624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 3456 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 18:19:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 18:19:41,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-03-20 18:19:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:19:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-03-20 18:19:41,710 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 70 [2022-03-20 18:19:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:41,711 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-03-20 18:19:41,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 60 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-03-20 18:19:41,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 18:19:41,711 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:41,711 INFO L499 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:41,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-03-20 18:19:41,711 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:41,711 INFO L85 PathProgramCache]: Analyzing trace with hash -103251770, now seen corresponding path program 54 times [2022-03-20 18:19:41,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:41,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1662616280] [2022-03-20 18:19:41,902 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:19:41,902 INFO L85 PathProgramCache]: Analyzing trace with hash -637014267, now seen corresponding path program 1 times [2022-03-20 18:19:41,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:41,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883415791] [2022-03-20 18:19:41,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:41,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:41,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:41,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883415791] [2022-03-20 18:19:41,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883415791] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:41,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:41,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:19:43,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1662616280] [2022-03-20 18:19:43,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1662616280] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:43,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:43,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 18:19:43,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445575045] [2022-03-20 18:19:43,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:43,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 18:19:43,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:43,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 18:19:43,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=3778, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 18:19:43,587 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 62 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:48,088 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2022-03-20 18:19:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 18:19:48,091 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-20 18:19:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:48,091 INFO L225 Difference]: With dead ends: 148 [2022-03-20 18:19:48,092 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 18:19:48,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=365, Invalid=13915, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 18:19:48,092 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 4292 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 4357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 4292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:48,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 310 Invalid, 4357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 4292 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 18:19:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 18:19:48,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2022-03-20 18:19:48,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 125 states have (on average 1.032) internal successors, (129), 125 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:19:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2022-03-20 18:19:48,177 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 71 [2022-03-20 18:19:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:48,177 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2022-03-20 18:19:48,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2022-03-20 18:19:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 18:19:48,178 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:48,178 INFO L499 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:48,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-03-20 18:19:48,178 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:48,178 INFO L85 PathProgramCache]: Analyzing trace with hash -716820122, now seen corresponding path program 54 times [2022-03-20 18:19:48,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:48,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [524529948] [2022-03-20 18:19:48,387 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:19:48,387 INFO L85 PathProgramCache]: Analyzing trace with hash 574942596, now seen corresponding path program 1 times [2022-03-20 18:19:48,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:48,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598728923] [2022-03-20 18:19:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:48,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:48,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:48,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:48,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598728923] [2022-03-20 18:19:48,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598728923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:48,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:48,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:19:50,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:50,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [524529948] [2022-03-20 18:19:50,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [524529948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:50,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:50,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 18:19:50,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323230173] [2022-03-20 18:19:50,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:50,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 18:19:50,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:50,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 18:19:50,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3605, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 18:19:50,364 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 62 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:54,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:54,867 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2022-03-20 18:19:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 18:19:54,868 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-20 18:19:54,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:54,868 INFO L225 Difference]: With dead ends: 148 [2022-03-20 18:19:54,869 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 18:19:54,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=649, Invalid=13871, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 18:19:54,869 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 3705 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 3876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 3705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:54,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 77 Invalid, 3876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3705 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 18:19:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 18:19:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2022-03-20 18:19:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:19:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-03-20 18:19:54,908 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 71 [2022-03-20 18:19:54,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:54,908 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-03-20 18:19:54,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-03-20 18:19:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 18:19:54,909 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:54,909 INFO L499 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:54,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-03-20 18:19:54,909 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:54,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1962443452, now seen corresponding path program 55 times [2022-03-20 18:19:54,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:54,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [965634214] [2022-03-20 18:19:55,132 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:19:55,132 INFO L85 PathProgramCache]: Analyzing trace with hash -62951547, now seen corresponding path program 1 times [2022-03-20 18:19:55,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:55,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992399207] [2022-03-20 18:19:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:55,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:55,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:55,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:55,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992399207] [2022-03-20 18:19:55,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992399207] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:55,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:55,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:19:56,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:56,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [965634214] [2022-03-20 18:19:56,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [965634214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:56,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:56,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 18:19:56,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533473823] [2022-03-20 18:19:56,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:56,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 18:19:56,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 18:19:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3902, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:19:56,885 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 63 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:00,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:00,851 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2022-03-20 18:20:00,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 18:20:00,854 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-20 18:20:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:00,854 INFO L225 Difference]: With dead ends: 150 [2022-03-20 18:20:00,855 INFO L226 Difference]: Without dead ends: 138 [2022-03-20 18:20:00,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=371, Invalid=14391, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 18:20:00,856 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 4500 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 4566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 4500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:00,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 320 Invalid, 4566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 4500 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 18:20:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-20 18:20:00,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2022-03-20 18:20:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 127 states have (on average 1.031496062992126) internal successors, (131), 127 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:20:00,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-03-20 18:20:00,893 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 72 [2022-03-20 18:20:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:00,893 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-03-20 18:20:00,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-03-20 18:20:00,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 18:20:00,894 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:00,894 INFO L499 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:00,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-03-20 18:20:00,894 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:00,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:00,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1430400067, now seen corresponding path program 55 times [2022-03-20 18:20:00,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:00,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [228198786] [2022-03-20 18:20:01,271 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:20:01,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1788703228, now seen corresponding path program 1 times [2022-03-20 18:20:01,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:01,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408359634] [2022-03-20 18:20:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:01,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:01,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:01,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:01,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408359634] [2022-03-20 18:20:01,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408359634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:01,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:01,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:20:03,559 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:03,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [228198786] [2022-03-20 18:20:03,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [228198786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:03,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:03,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 18:20:03,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435569619] [2022-03-20 18:20:03,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:03,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 18:20:03,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:03,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 18:20:03,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3726, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 18:20:03,561 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 63 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:07,910 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2022-03-20 18:20:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 18:20:07,913 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-20 18:20:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:07,914 INFO L225 Difference]: With dead ends: 150 [2022-03-20 18:20:07,914 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 18:20:07,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=660, Invalid=14346, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 18:20:07,915 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3714 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 3888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 3714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:07,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 61 Invalid, 3888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 3714 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 18:20:07,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 18:20:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2022-03-20 18:20:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:20:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-03-20 18:20:07,953 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 72 [2022-03-20 18:20:07,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:07,953 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-03-20 18:20:07,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-03-20 18:20:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 18:20:07,953 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:07,953 INFO L499 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:07,953 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-03-20 18:20:07,953 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:07,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:07,954 INFO L85 PathProgramCache]: Analyzing trace with hash 532156550, now seen corresponding path program 56 times [2022-03-20 18:20:07,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:07,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [149443911] [2022-03-20 18:20:08,113 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:20:08,113 INFO L85 PathProgramCache]: Analyzing trace with hash 511111173, now seen corresponding path program 1 times [2022-03-20 18:20:08,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:08,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797112861] [2022-03-20 18:20:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:08,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:08,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:08,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:08,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797112861] [2022-03-20 18:20:08,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797112861] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:08,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:08,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:20:10,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:10,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [149443911] [2022-03-20 18:20:10,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [149443911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:10,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:10,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 18:20:10,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922980421] [2022-03-20 18:20:10,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:10,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 18:20:10,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:10,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 18:20:10,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4028, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 18:20:10,006 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 64 states, 64 states have (on average 1.078125) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:15,223 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2022-03-20 18:20:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 18:20:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.078125) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-03-20 18:20:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:15,226 INFO L225 Difference]: With dead ends: 152 [2022-03-20 18:20:15,226 INFO L226 Difference]: Without dead ends: 140 [2022-03-20 18:20:15,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=377, Invalid=14875, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 18:20:15,228 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 4618 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 4685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:15,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 321 Invalid, 4685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4618 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 18:20:15,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-20 18:20:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-03-20 18:20:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 129 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:20:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-03-20 18:20:15,278 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 73 [2022-03-20 18:20:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:15,278 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-03-20 18:20:15,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.078125) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-03-20 18:20:15,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 18:20:15,278 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:15,279 INFO L499 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:15,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-03-20 18:20:15,279 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash -725250810, now seen corresponding path program 56 times [2022-03-20 18:20:15,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:15,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1686817468] [2022-03-20 18:20:15,414 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:20:15,415 INFO L85 PathProgramCache]: Analyzing trace with hash 142618244, now seen corresponding path program 1 times [2022-03-20 18:20:15,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:15,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785634824] [2022-03-20 18:20:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:15,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:15,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:15,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:15,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785634824] [2022-03-20 18:20:15,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785634824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:15,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:15,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:20:17,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:17,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1686817468] [2022-03-20 18:20:17,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1686817468] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:17,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:17,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 18:20:17,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060038344] [2022-03-20 18:20:17,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:17,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 18:20:17,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:17,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 18:20:17,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3849, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:20:17,691 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 64 states, 64 states have (on average 1.078125) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:23,126 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2022-03-20 18:20:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 18:20:23,128 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.078125) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-03-20 18:20:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:23,129 INFO L225 Difference]: With dead ends: 152 [2022-03-20 18:20:23,129 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 18:20:23,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=671, Invalid=14829, Unknown=0, NotChecked=0, Total=15500 [2022-03-20 18:20:23,130 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4043 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 4220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 4043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:23,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 141 Invalid, 4220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 4043 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-20 18:20:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 18:20:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2022-03-20 18:20:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:20:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-03-20 18:20:23,174 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 73 [2022-03-20 18:20:23,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:23,174 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-03-20 18:20:23,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.078125) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-03-20 18:20:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 18:20:23,175 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:23,175 INFO L499 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:23,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-03-20 18:20:23,175 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:23,175 INFO L85 PathProgramCache]: Analyzing trace with hash 555345284, now seen corresponding path program 57 times [2022-03-20 18:20:23,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:23,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1428258142] [2022-03-20 18:20:23,396 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:20:23,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1085173893, now seen corresponding path program 1 times [2022-03-20 18:20:23,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:23,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145466579] [2022-03-20 18:20:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:23,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:23,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:23,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:23,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145466579] [2022-03-20 18:20:23,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145466579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:23,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:23,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:20:25,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:25,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1428258142] [2022-03-20 18:20:25,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1428258142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:25,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:25,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 18:20:25,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244990795] [2022-03-20 18:20:25,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:25,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 18:20:25,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:25,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 18:20:25,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=4156, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 18:20:25,233 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 65 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 64 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:29,632 INFO L93 Difference]: Finished difference Result 154 states and 161 transitions. [2022-03-20 18:20:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 18:20:29,635 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 64 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-03-20 18:20:29,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:29,635 INFO L225 Difference]: With dead ends: 154 [2022-03-20 18:20:29,635 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 18:20:29,649 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2182 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=383, Invalid=15367, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 18:20:29,650 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 4834 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 4902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 4834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:29,650 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 331 Invalid, 4902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 4834 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 18:20:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 18:20:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 137. [2022-03-20 18:20:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 131 states have (on average 1.0305343511450382) internal successors, (135), 131 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:20:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-03-20 18:20:29,689 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 74 [2022-03-20 18:20:29,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:29,690 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-03-20 18:20:29,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 64 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-03-20 18:20:29,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 18:20:29,690 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:29,690 INFO L499 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:29,690 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-03-20 18:20:29,690 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1169048739, now seen corresponding path program 57 times [2022-03-20 18:20:29,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:29,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668388745] [2022-03-20 18:20:29,836 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:20:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2073939716, now seen corresponding path program 1 times [2022-03-20 18:20:29,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:29,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349724659] [2022-03-20 18:20:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:29,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:29,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:29,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:29,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349724659] [2022-03-20 18:20:29,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349724659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:29,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:29,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:20:31,530 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:31,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668388745] [2022-03-20 18:20:31,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668388745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:31,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:31,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 18:20:31,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954613396] [2022-03-20 18:20:31,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:31,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 18:20:31,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:31,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 18:20:31,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3974, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 18:20:31,532 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 65 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 64 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:36,142 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2022-03-20 18:20:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 18:20:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 64 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-03-20 18:20:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:36,144 INFO L225 Difference]: With dead ends: 154 [2022-03-20 18:20:36,144 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 18:20:36,145 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=682, Invalid=15320, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 18:20:36,145 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 4400 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 4580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 4400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:36,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 217 Invalid, 4580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 4400 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 18:20:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 18:20:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2022-03-20 18:20:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:20:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-03-20 18:20:36,207 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 74 [2022-03-20 18:20:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:36,207 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-03-20 18:20:36,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 64 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-03-20 18:20:36,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 18:20:36,207 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:36,207 INFO L499 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:36,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-03-20 18:20:36,207 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1274196038, now seen corresponding path program 58 times [2022-03-20 18:20:36,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:36,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1271762136] [2022-03-20 18:20:36,332 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:20:36,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1659236613, now seen corresponding path program 1 times [2022-03-20 18:20:36,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:36,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962794549] [2022-03-20 18:20:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:36,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:36,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:36,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:36,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962794549] [2022-03-20 18:20:36,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962794549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:36,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:36,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:20:38,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:38,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1271762136] [2022-03-20 18:20:38,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1271762136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:38,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:38,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 18:20:38,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35391185] [2022-03-20 18:20:38,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:38,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 18:20:38,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:38,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 18:20:38,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4286, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 18:20:38,116 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 66 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 65 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:43,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:43,400 INFO L93 Difference]: Finished difference Result 156 states and 163 transitions. [2022-03-20 18:20:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 18:20:43,401 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 65 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-03-20 18:20:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:43,401 INFO L225 Difference]: With dead ends: 156 [2022-03-20 18:20:43,401 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 18:20:43,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=389, Invalid=15867, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 18:20:43,402 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 4914 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 4983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:43,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 335 Invalid, 4983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 4914 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 18:20:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 18:20:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2022-03-20 18:20:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 133 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:20:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2022-03-20 18:20:43,444 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 75 [2022-03-20 18:20:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:43,444 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2022-03-20 18:20:43,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 65 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2022-03-20 18:20:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 18:20:43,444 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:43,444 INFO L499 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:43,444 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-03-20 18:20:43,444 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:43,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:43,445 INFO L85 PathProgramCache]: Analyzing trace with hash -237207386, now seen corresponding path program 58 times [2022-03-20 18:20:43,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:43,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1046117891] [2022-03-20 18:20:43,545 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:20:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash -289706108, now seen corresponding path program 1 times [2022-03-20 18:20:43,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:43,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827990475] [2022-03-20 18:20:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:43,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:43,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:43,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:43,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827990475] [2022-03-20 18:20:43,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827990475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:43,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:43,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:20:45,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:45,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1046117891] [2022-03-20 18:20:45,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1046117891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:45,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:45,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 18:20:45,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442459816] [2022-03-20 18:20:45,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:45,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 18:20:45,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:45,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 18:20:45,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4101, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 18:20:45,535 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 66 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 65 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:50,731 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2022-03-20 18:20:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 18:20:50,732 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 65 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-03-20 18:20:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:50,733 INFO L225 Difference]: With dead ends: 156 [2022-03-20 18:20:50,733 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 18:20:50,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=693, Invalid=15819, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 18:20:50,734 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 4622 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 4805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 4622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:50,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 252 Invalid, 4805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 4622 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 18:20:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 18:20:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2022-03-20 18:20:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 134 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:20:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2022-03-20 18:20:50,776 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 75 [2022-03-20 18:20:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:50,776 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2022-03-20 18:20:50,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 65 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2022-03-20 18:20:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 18:20:50,777 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:50,777 INFO L499 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:50,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-03-20 18:20:50,777 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:50,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2083732932, now seen corresponding path program 59 times [2022-03-20 18:20:50,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:50,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [388410836] [2022-03-20 18:20:50,907 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:20:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2061667963, now seen corresponding path program 1 times [2022-03-20 18:20:50,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:50,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385370788] [2022-03-20 18:20:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:50,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:50,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:50,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:50,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385370788] [2022-03-20 18:20:50,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385370788] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:50,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:50,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:20:52,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:52,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [388410836] [2022-03-20 18:20:52,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [388410836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:52,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:52,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 18:20:52,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540421602] [2022-03-20 18:20:52,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:52,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 18:20:52,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:52,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 18:20:52,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4418, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 18:20:52,977 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 67 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 66 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:58,459 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2022-03-20 18:20:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 18:20:58,470 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 66 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-03-20 18:20:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:58,471 INFO L225 Difference]: With dead ends: 158 [2022-03-20 18:20:58,471 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 18:20:58,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=395, Invalid=16375, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 18:20:58,472 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 5046 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 5116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 5046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:58,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 336 Invalid, 5116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 5046 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-20 18:20:58,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 18:20:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2022-03-20 18:20:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 135 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:20:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-03-20 18:20:58,528 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 76 [2022-03-20 18:20:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:58,528 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-03-20 18:20:58,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 66 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-03-20 18:20:58,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 18:20:58,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:58,529 INFO L499 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:58,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-03-20 18:20:58,529 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:58,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:58,529 INFO L85 PathProgramCache]: Analyzing trace with hash -881474301, now seen corresponding path program 59 times [2022-03-20 18:20:58,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:58,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [676997939] [2022-03-20 18:20:58,691 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:20:58,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1641615364, now seen corresponding path program 1 times [2022-03-20 18:20:58,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:58,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044062081] [2022-03-20 18:20:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:58,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:58,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:58,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:58,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044062081] [2022-03-20 18:20:58,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044062081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:58,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:58,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:21:00,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:21:00,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [676997939] [2022-03-20 18:21:00,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [676997939] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:00,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:00,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 18:21:00,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318527800] [2022-03-20 18:21:00,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:21:00,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 18:21:00,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:00,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 18:21:00,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4230, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 18:21:00,545 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 67 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 66 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:05,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:21:05,981 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2022-03-20 18:21:05,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 18:21:05,984 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 66 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-03-20 18:21:05,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:21:05,985 INFO L225 Difference]: With dead ends: 158 [2022-03-20 18:21:05,985 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 18:21:05,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=704, Invalid=16326, Unknown=0, NotChecked=0, Total=17030 [2022-03-20 18:21:05,986 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 4826 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 5012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 4826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:21:05,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 271 Invalid, 5012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 4826 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-20 18:21:05,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 18:21:06,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2022-03-20 18:21:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:21:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2022-03-20 18:21:06,045 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 76 [2022-03-20 18:21:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:21:06,045 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2022-03-20 18:21:06,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 66 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2022-03-20 18:21:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 18:21:06,045 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:21:06,045 INFO L499 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:21:06,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-03-20 18:21:06,045 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:21:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:21:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1409572870, now seen corresponding path program 60 times [2022-03-20 18:21:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:06,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [589767992] [2022-03-20 18:21:06,276 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:21:06,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1487605243, now seen corresponding path program 1 times [2022-03-20 18:21:06,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:21:06,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253785428] [2022-03-20 18:21:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:21:06,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:21:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:06,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:21:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:21:06,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:21:06,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253785428] [2022-03-20 18:21:06,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253785428] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:06,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:06,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:21:08,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:21:08,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [589767992] [2022-03-20 18:21:08,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [589767992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:08,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:08,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 18:21:08,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5475040] [2022-03-20 18:21:08,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:21:08,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 18:21:08,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:08,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 18:21:08,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4552, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 18:21:08,022 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 67 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:21:13,941 INFO L93 Difference]: Finished difference Result 160 states and 167 transitions. [2022-03-20 18:21:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 18:21:13,944 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 67 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-20 18:21:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:21:13,944 INFO L225 Difference]: With dead ends: 160 [2022-03-20 18:21:13,944 INFO L226 Difference]: Without dead ends: 148 [2022-03-20 18:21:13,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=401, Invalid=16891, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 18:21:13,945 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 5190 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 5261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 5190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:21:13,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 341 Invalid, 5261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 5190 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-20 18:21:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-20 18:21:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2022-03-20 18:21:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 137 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:21:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-03-20 18:21:13,987 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 77 [2022-03-20 18:21:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:21:13,987 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-03-20 18:21:13,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 67 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:13,988 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-03-20 18:21:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 18:21:13,988 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:21:13,988 INFO L499 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:21:13,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-03-20 18:21:13,988 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:21:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:21:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash 621087814, now seen corresponding path program 60 times [2022-03-20 18:21:13,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:13,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [191900143] [2022-03-20 18:21:14,180 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:21:14,180 INFO L85 PathProgramCache]: Analyzing trace with hash -722030460, now seen corresponding path program 1 times [2022-03-20 18:21:14,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:21:14,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169075844] [2022-03-20 18:21:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:21:14,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:21:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:14,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:21:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:21:14,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:21:14,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169075844] [2022-03-20 18:21:14,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169075844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:14,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:14,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:21:16,388 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:21:16,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [191900143] [2022-03-20 18:21:16,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [191900143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:16,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:16,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 18:21:16,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122444440] [2022-03-20 18:21:16,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:21:16,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 18:21:16,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 18:21:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4361, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 18:21:16,389 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 67 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:22,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:21:22,580 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2022-03-20 18:21:22,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 18:21:22,581 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 67 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-20 18:21:22,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:21:22,582 INFO L225 Difference]: With dead ends: 160 [2022-03-20 18:21:22,582 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 18:21:22,583 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=715, Invalid=16841, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 18:21:22,583 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 4928 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 5117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 4928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:21:22,583 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 261 Invalid, 5117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 4928 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-20 18:21:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 18:21:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 144. [2022-03-20 18:21:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:21:22,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2022-03-20 18:21:22,638 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 77 [2022-03-20 18:21:22,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:21:22,638 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2022-03-20 18:21:22,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 67 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2022-03-20 18:21:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 18:21:22,638 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:21:22,639 INFO L499 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:21:22,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-03-20 18:21:22,639 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:21:22,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:21:22,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1985447428, now seen corresponding path program 61 times [2022-03-20 18:21:22,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:22,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [939052276] [2022-03-20 18:21:22,818 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:21:22,818 INFO L85 PathProgramCache]: Analyzing trace with hash -913542523, now seen corresponding path program 1 times [2022-03-20 18:21:22,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:21:22,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420687409] [2022-03-20 18:21:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:21:22,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:21:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:22,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:21:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:21:22,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:21:22,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420687409] [2022-03-20 18:21:22,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420687409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:22,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:22,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:21:25,029 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:21:25,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [939052276] [2022-03-20 18:21:25,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [939052276] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:25,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:25,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 18:21:25,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287428711] [2022-03-20 18:21:25,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:21:25,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 18:21:25,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:25,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 18:21:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4688, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:21:25,031 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 69 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 68 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:31,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:21:31,331 INFO L93 Difference]: Finished difference Result 162 states and 169 transitions. [2022-03-20 18:21:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 18:21:31,331 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 68 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-03-20 18:21:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:21:31,332 INFO L225 Difference]: With dead ends: 162 [2022-03-20 18:21:31,332 INFO L226 Difference]: Without dead ends: 150 [2022-03-20 18:21:31,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2456 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=407, Invalid=17415, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 18:21:31,333 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 5273 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 5345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 5273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:21:31,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 345 Invalid, 5345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 5273 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-20 18:21:31,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-20 18:21:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2022-03-20 18:21:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:21:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-03-20 18:21:31,377 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 78 [2022-03-20 18:21:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:21:31,377 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-03-20 18:21:31,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 68 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-03-20 18:21:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 18:21:31,377 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:21:31,377 INFO L499 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:21:31,377 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-03-20 18:21:31,377 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:21:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:21:31,378 INFO L85 PathProgramCache]: Analyzing trace with hash -44126877, now seen corresponding path program 61 times [2022-03-20 18:21:31,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:31,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1505104569] [2022-03-20 18:21:31,507 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:21:31,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1209291012, now seen corresponding path program 1 times [2022-03-20 18:21:31,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:21:31,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798986714] [2022-03-20 18:21:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:21:31,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:21:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:31,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:21:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:21:31,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:21:31,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798986714] [2022-03-20 18:21:31,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798986714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:31,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:31,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:21:33,926 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:21:33,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1505104569] [2022-03-20 18:21:33,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1505104569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:33,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:33,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 18:21:33,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025889687] [2022-03-20 18:21:33,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:21:33,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 18:21:33,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:33,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 18:21:33,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=4494, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 18:21:33,927 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 69 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 68 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:40,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:21:40,143 INFO L93 Difference]: Finished difference Result 162 states and 168 transitions. [2022-03-20 18:21:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 18:21:40,146 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 68 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-03-20 18:21:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:21:40,152 INFO L225 Difference]: With dead ends: 162 [2022-03-20 18:21:40,152 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 18:21:40,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=726, Invalid=17364, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 18:21:40,153 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 5127 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 5319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 5127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:21:40,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 286 Invalid, 5319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 5127 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-20 18:21:40,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 18:21:40,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2022-03-20 18:21:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:21:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2022-03-20 18:21:40,208 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 78 [2022-03-20 18:21:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:21:40,208 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2022-03-20 18:21:40,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 68 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2022-03-20 18:21:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 18:21:40,208 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:21:40,208 INFO L499 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:21:40,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-03-20 18:21:40,208 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:21:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:21:40,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1637277754, now seen corresponding path program 62 times [2022-03-20 18:21:40,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:40,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [138711403] [2022-03-20 18:21:40,370 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:21:40,370 INFO L85 PathProgramCache]: Analyzing trace with hash -339479803, now seen corresponding path program 1 times [2022-03-20 18:21:40,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:21:40,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360358791] [2022-03-20 18:21:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:21:40,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:21:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:40,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:21:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:21:40,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:21:40,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360358791] [2022-03-20 18:21:40,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360358791] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:40,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:40,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:21:42,275 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:21:42,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [138711403] [2022-03-20 18:21:42,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [138711403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:42,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:42,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 18:21:42,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18970347] [2022-03-20 18:21:42,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:21:42,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 18:21:42,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:42,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 18:21:42,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=4826, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 18:21:42,276 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:21:48,321 INFO L93 Difference]: Finished difference Result 164 states and 171 transitions. [2022-03-20 18:21:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 18:21:48,323 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-20 18:21:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:21:48,323 INFO L225 Difference]: With dead ends: 164 [2022-03-20 18:21:48,323 INFO L226 Difference]: Without dead ends: 152 [2022-03-20 18:21:48,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=413, Invalid=17947, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 18:21:48,324 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 5420 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 5493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 5420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:21:48,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 350 Invalid, 5493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 5420 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-20 18:21:48,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-20 18:21:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2022-03-20 18:21:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 141 states have (on average 1.0283687943262412) internal successors, (145), 141 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:21:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-03-20 18:21:48,369 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 79 [2022-03-20 18:21:48,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:21:48,369 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-03-20 18:21:48,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-03-20 18:21:48,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 18:21:48,369 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:21:48,370 INFO L499 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:21:48,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-03-20 18:21:48,370 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:21:48,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:21:48,370 INFO L85 PathProgramCache]: Analyzing trace with hash 809054182, now seen corresponding path program 62 times [2022-03-20 18:21:48,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:48,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [674036517] [2022-03-20 18:21:48,575 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:21:48,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1154354812, now seen corresponding path program 1 times [2022-03-20 18:21:48,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:21:48,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600232075] [2022-03-20 18:21:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:21:48,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:21:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:48,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:21:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:21:48,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:21:48,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600232075] [2022-03-20 18:21:48,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600232075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:48,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:48,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:21:50,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:21:50,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [674036517] [2022-03-20 18:21:50,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [674036517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:50,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:50,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 18:21:50,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57898863] [2022-03-20 18:21:50,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:21:50,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 18:21:50,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:50,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 18:21:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4629, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:21:50,974 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:21:57,232 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2022-03-20 18:21:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 18:21:57,235 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-20 18:21:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:21:57,236 INFO L225 Difference]: With dead ends: 164 [2022-03-20 18:21:57,236 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 18:21:57,237 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2271 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=737, Invalid=17895, Unknown=0, NotChecked=0, Total=18632 [2022-03-20 18:21:57,237 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4814 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 4814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:21:57,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 141 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 4814 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-20 18:21:57,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 18:21:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2022-03-20 18:21:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.028169014084507) internal successors, (146), 142 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:21:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2022-03-20 18:21:57,283 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 79 [2022-03-20 18:21:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:21:57,283 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2022-03-20 18:21:57,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2022-03-20 18:21:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 18:21:57,283 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:21:57,283 INFO L499 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:21:57,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-03-20 18:21:57,283 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:21:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:21:57,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2022358596, now seen corresponding path program 63 times [2022-03-20 18:21:57,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:57,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1753024514] [2022-03-20 18:21:57,515 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:21:57,515 INFO L85 PathProgramCache]: Analyzing trace with hash 234582917, now seen corresponding path program 1 times [2022-03-20 18:21:57,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:21:57,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908596011] [2022-03-20 18:21:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:21:57,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:21:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:57,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:21:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:21:57,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:21:57,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908596011] [2022-03-20 18:21:57,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908596011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:57,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:57,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:21:59,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:21:59,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1753024514] [2022-03-20 18:21:59,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1753024514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:59,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:59,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 18:21:59,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167604362] [2022-03-20 18:21:59,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:21:59,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 18:21:59,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:59,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 18:21:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=4966, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:21:59,266 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 71 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:22:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:22:05,082 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2022-03-20 18:22:05,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 18:22:05,087 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-20 18:22:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:22:05,087 INFO L225 Difference]: With dead ends: 166 [2022-03-20 18:22:05,087 INFO L226 Difference]: Without dead ends: 154 [2022-03-20 18:22:05,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=419, Invalid=18487, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 18:22:05,089 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 5550 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 5624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 5550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:22:05,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 351 Invalid, 5624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 5550 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-20 18:22:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-20 18:22:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2022-03-20 18:22:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 143 states have (on average 1.027972027972028) internal successors, (147), 143 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:22:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2022-03-20 18:22:05,135 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 80 [2022-03-20 18:22:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:22:05,135 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2022-03-20 18:22:05,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:22:05,136 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2022-03-20 18:22:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 18:22:05,136 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:22:05,136 INFO L499 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:22:05,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-03-20 18:22:05,139 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:22:05,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:22:05,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1487863235, now seen corresponding path program 63 times [2022-03-20 18:22:05,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:22:05,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1121808180] [2022-03-20 18:22:05,298 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:22:05,298 INFO L85 PathProgramCache]: Analyzing trace with hash 776966660, now seen corresponding path program 1 times [2022-03-20 18:22:05,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:22:05,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248598134] [2022-03-20 18:22:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:22:05,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:22:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:22:05,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:22:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:22:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:22:05,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:22:05,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248598134] [2022-03-20 18:22:05,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248598134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:22:05,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:22:05,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:22:07,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:22:07,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1121808180] [2022-03-20 18:22:07,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1121808180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:22:07,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:22:07,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 18:22:07,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125569748] [2022-03-20 18:22:07,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:22:07,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 18:22:07,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:22:07,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 18:22:07,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=4766, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 18:22:07,247 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 71 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:22:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:22:14,525 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2022-03-20 18:22:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 18:22:14,526 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-20 18:22:14,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:22:14,527 INFO L225 Difference]: With dead ends: 166 [2022-03-20 18:22:14,528 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 18:22:14,530 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=748, Invalid=18434, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 18:22:14,530 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 5298 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 5496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 5298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:22:14,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 276 Invalid, 5496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 5298 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-20 18:22:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 18:22:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 150. [2022-03-20 18:22:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 144 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:22:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-03-20 18:22:14,589 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 80 [2022-03-20 18:22:14,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:22:14,589 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-03-20 18:22:14,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:22:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-03-20 18:22:14,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 18:22:14,590 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:22:14,590 INFO L499 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:22:14,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-03-20 18:22:14,591 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:22:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:22:14,591 INFO L85 PathProgramCache]: Analyzing trace with hash -493031546, now seen corresponding path program 64 times [2022-03-20 18:22:14,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:22:14,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1687714840] [2022-03-20 18:22:14,703 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:22:14,703 INFO L85 PathProgramCache]: Analyzing trace with hash 808645637, now seen corresponding path program 1 times [2022-03-20 18:22:14,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:22:14,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127616184] [2022-03-20 18:22:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:22:14,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:22:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:22:14,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:22:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:22:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:22:14,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:22:14,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127616184] [2022-03-20 18:22:14,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127616184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:22:14,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:22:14,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:22:17,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:22:17,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1687714840] [2022-03-20 18:22:17,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1687714840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:22:17,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:22:17,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 18:22:17,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777953751] [2022-03-20 18:22:17,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:22:17,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 18:22:17,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:22:17,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 18:22:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5108, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 18:22:17,087 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 72 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:22:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:22:24,083 INFO L93 Difference]: Finished difference Result 168 states and 175 transitions. [2022-03-20 18:22:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 18:22:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-20 18:22:24,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:22:24,085 INFO L225 Difference]: With dead ends: 168 [2022-03-20 18:22:24,085 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 18:22:24,086 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=425, Invalid=19035, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 18:22:24,086 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 5712 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 5787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 5712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:22:24,086 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 360 Invalid, 5787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 5712 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-20 18:22:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 18:22:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2022-03-20 18:22:24,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 145 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:22:24,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2022-03-20 18:22:24,134 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 81 [2022-03-20 18:22:24,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:22:24,134 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2022-03-20 18:22:24,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:22:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2022-03-20 18:22:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 18:22:24,135 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:22:24,135 INFO L499 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:22:24,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-03-20 18:22:24,135 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:22:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:22:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1056107398, now seen corresponding path program 64 times [2022-03-20 18:22:24,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:22:24,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1537246392] [2022-03-20 18:22:24,273 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:22:24,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1586679164, now seen corresponding path program 1 times [2022-03-20 18:22:24,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:22:24,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930323571] [2022-03-20 18:22:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:22:24,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:22:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:22:24,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:22:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:22:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:22:24,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:22:24,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930323571] [2022-03-20 18:22:24,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930323571] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:22:24,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:22:24,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:22:26,831 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:22:26,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1537246392] [2022-03-20 18:22:26,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1537246392] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:22:26,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:22:26,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 18:22:26,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296880961] [2022-03-20 18:22:26,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:22:26,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 18:22:26,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:22:26,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 18:22:26,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4905, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:22:26,833 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 72 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:22:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:22:33,779 INFO L93 Difference]: Finished difference Result 168 states and 174 transitions. [2022-03-20 18:22:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 18:22:33,780 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-20 18:22:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:22:33,781 INFO L225 Difference]: With dead ends: 168 [2022-03-20 18:22:33,781 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 18:22:33,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2408 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=759, Invalid=18981, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 18:22:33,783 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 4968 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 5169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 4968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:22:33,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 5169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 4968 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-20 18:22:33,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 18:22:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 152. [2022-03-20 18:22:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:22:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2022-03-20 18:22:33,838 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 81 [2022-03-20 18:22:33,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:22:33,838 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2022-03-20 18:22:33,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:22:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2022-03-20 18:22:33,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 18:22:33,839 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:22:33,839 INFO L499 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:22:33,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-03-20 18:22:33,839 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:22:33,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:22:33,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1160714620, now seen corresponding path program 65 times [2022-03-20 18:22:33,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:22:33,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1397433777] [2022-03-20 18:22:34,038 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:22:34,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1382708357, now seen corresponding path program 1 times [2022-03-20 18:22:34,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:22:34,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165426414] [2022-03-20 18:22:34,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:22:34,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:22:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:22:34,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:22:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:22:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:22:34,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:22:34,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165426414] [2022-03-20 18:22:34,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165426414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:22:34,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:22:34,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:22:36,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:22:36,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1397433777] [2022-03-20 18:22:36,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1397433777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:22:36,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:22:36,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 18:22:36,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143670286] [2022-03-20 18:22:36,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:22:36,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 18:22:36,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:22:36,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 18:22:36,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=5252, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 18:22:36,164 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 73 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 72 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:22:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:22:43,679 INFO L93 Difference]: Finished difference Result 170 states and 177 transitions. [2022-03-20 18:22:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 18:22:43,683 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 72 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-03-20 18:22:43,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:22:43,684 INFO L225 Difference]: With dead ends: 170 [2022-03-20 18:22:43,684 INFO L226 Difference]: Without dead ends: 158 [2022-03-20 18:22:43,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=431, Invalid=19591, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 18:22:43,685 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 5873 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 5949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 5873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:22:43,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 365 Invalid, 5949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 5873 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-20 18:22:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-20 18:22:43,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 153. [2022-03-20 18:22:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 147 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:22:43,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2022-03-20 18:22:43,734 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 82 [2022-03-20 18:22:43,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:22:43,734 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2022-03-20 18:22:43,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 72 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:22:43,734 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2022-03-20 18:22:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 18:22:43,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:22:43,734 INFO L499 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:22:43,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-03-20 18:22:43,735 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:22:43,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:22:43,735 INFO L85 PathProgramCache]: Analyzing trace with hash 556578339, now seen corresponding path program 65 times [2022-03-20 18:22:43,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:22:43,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [185609242] [2022-03-20 18:22:43,923 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:22:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash 344642308, now seen corresponding path program 1 times [2022-03-20 18:22:43,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:22:43,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899207183] [2022-03-20 18:22:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:22:43,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:22:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:22:44,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:22:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:22:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:22:44,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:22:44,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899207183] [2022-03-20 18:22:44,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899207183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:22:44,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:22:44,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:22:46,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:22:46,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [185609242] [2022-03-20 18:22:46,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [185609242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:22:46,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:22:46,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 18:22:46,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986048227] [2022-03-20 18:22:46,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:22:46,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 18:22:46,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:22:46,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 18:22:46,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=5046, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 18:22:46,066 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 73 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 72 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:22:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:22:53,102 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2022-03-20 18:22:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 18:22:53,103 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 72 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-03-20 18:22:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:22:53,103 INFO L225 Difference]: With dead ends: 170 [2022-03-20 18:22:53,103 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 18:22:53,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=770, Invalid=19536, Unknown=0, NotChecked=0, Total=20306 [2022-03-20 18:22:53,105 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 5922 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 6126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 5922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:22:53,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 357 Invalid, 6126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 5922 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 18:22:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 18:22:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2022-03-20 18:22:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:22:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2022-03-20 18:22:53,160 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 82 [2022-03-20 18:22:53,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:22:53,160 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2022-03-20 18:22:53,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 72 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:22:53,160 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2022-03-20 18:22:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 18:22:53,160 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:22:53,160 INFO L499 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:22:53,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-03-20 18:22:53,160 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:22:53,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:22:53,161 INFO L85 PathProgramCache]: Analyzing trace with hash -384053434, now seen corresponding path program 66 times [2022-03-20 18:22:53,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:22:53,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2016993945] [2022-03-20 18:22:53,327 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:22:53,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1956771077, now seen corresponding path program 1 times [2022-03-20 18:22:53,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:22:53,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376163593] [2022-03-20 18:22:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:22:53,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:22:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:22:53,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:22:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:22:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:22:53,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:22:53,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376163593] [2022-03-20 18:22:53,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376163593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:22:53,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:22:53,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:22:55,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:22:55,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2016993945] [2022-03-20 18:22:55,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2016993945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:22:55,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:22:55,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 18:22:55,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515152367] [2022-03-20 18:22:55,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:22:55,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 18:22:55,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:22:55,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 18:22:55,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5398, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 18:22:55,782 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:23:03,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:23:03,046 INFO L93 Difference]: Finished difference Result 172 states and 179 transitions. [2022-03-20 18:23:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 18:23:03,047 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 18:23:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:23:03,048 INFO L225 Difference]: With dead ends: 172 [2022-03-20 18:23:03,048 INFO L226 Difference]: Without dead ends: 160 [2022-03-20 18:23:03,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=437, Invalid=20155, Unknown=0, NotChecked=0, Total=20592 [2022-03-20 18:23:03,049 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 6106 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 6183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 6106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:23:03,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 375 Invalid, 6183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 6106 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-03-20 18:23:03,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-20 18:23:03,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2022-03-20 18:23:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:23:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2022-03-20 18:23:03,100 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 83 [2022-03-20 18:23:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:23:03,100 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2022-03-20 18:23:03,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:23:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2022-03-20 18:23:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 18:23:03,100 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:23:03,100 INFO L499 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:23:03,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-03-20 18:23:03,100 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:23:03,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:23:03,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2043920602, now seen corresponding path program 66 times [2022-03-20 18:23:03,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:23:03,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1147433723] [2022-03-20 18:23:03,312 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:23:03,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2019003516, now seen corresponding path program 1 times [2022-03-20 18:23:03,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:23:03,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828002513] [2022-03-20 18:23:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:23:03,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:23:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:23:03,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:23:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:23:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:23:03,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:23:03,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828002513] [2022-03-20 18:23:03,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828002513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:23:03,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:23:03,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:23:05,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:23:05,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1147433723] [2022-03-20 18:23:05,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1147433723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:23:05,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:23:05,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 18:23:05,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106499498] [2022-03-20 18:23:05,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:23:05,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 18:23:05,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:23:05,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 18:23:05,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=5189, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 18:23:05,960 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:23:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:23:14,015 INFO L93 Difference]: Finished difference Result 172 states and 178 transitions. [2022-03-20 18:23:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 18:23:14,019 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 18:23:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:23:14,019 INFO L225 Difference]: With dead ends: 172 [2022-03-20 18:23:14,019 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 18:23:14,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2549 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=781, Invalid=20099, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 18:23:14,021 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 5864 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 6071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 5864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:23:14,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 312 Invalid, 6071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 5864 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-20 18:23:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 18:23:14,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2022-03-20 18:23:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:23:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2022-03-20 18:23:14,072 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 83 [2022-03-20 18:23:14,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:23:14,072 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2022-03-20 18:23:14,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:23:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2022-03-20 18:23:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 18:23:14,073 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:23:14,073 INFO L499 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:23:14,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-03-20 18:23:14,073 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:23:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:23:14,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2077360444, now seen corresponding path program 67 times [2022-03-20 18:23:14,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:23:14,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [577425357] [2022-03-20 18:23:14,259 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:23:14,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1764133499, now seen corresponding path program 1 times [2022-03-20 18:23:14,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:23:14,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702891020] [2022-03-20 18:23:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:23:14,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:23:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:23:14,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:23:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:23:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:23:14,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:23:14,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702891020] [2022-03-20 18:23:14,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702891020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:23:14,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:23:14,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:23:16,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:23:16,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [577425357] [2022-03-20 18:23:16,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [577425357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:23:16,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:23:16,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 18:23:16,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934612432] [2022-03-20 18:23:16,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:23:16,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 18:23:16,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:23:16,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 18:23:16,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5546, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:23:16,767 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 75 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 74 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:23:24,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:23:24,012 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2022-03-20 18:23:24,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 18:23:24,013 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 74 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-03-20 18:23:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:23:24,014 INFO L225 Difference]: With dead ends: 174 [2022-03-20 18:23:24,014 INFO L226 Difference]: Without dead ends: 162 [2022-03-20 18:23:24,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2897 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=443, Invalid=20727, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 18:23:24,015 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 6185 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 6263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 6185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:23:24,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 375 Invalid, 6263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 6185 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-20 18:23:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-20 18:23:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2022-03-20 18:23:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:23:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-03-20 18:23:24,067 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 84 [2022-03-20 18:23:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:23:24,067 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-03-20 18:23:24,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 74 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:23:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-03-20 18:23:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 18:23:24,067 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:23:24,067 INFO L499 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:23:24,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-03-20 18:23:24,067 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:23:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:23:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1055009149, now seen corresponding path program 67 times [2022-03-20 18:23:24,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:23:24,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1562090647] [2022-03-20 18:23:24,218 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:23:24,218 INFO L85 PathProgramCache]: Analyzing trace with hash -87682044, now seen corresponding path program 1 times [2022-03-20 18:23:24,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:23:24,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109244150] [2022-03-20 18:23:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:23:24,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:23:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:23:24,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:23:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:23:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:23:24,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:23:24,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109244150] [2022-03-20 18:23:24,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109244150] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:23:24,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:23:24,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:23:26,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:23:26,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1562090647] [2022-03-20 18:23:26,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1562090647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:23:26,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:23:26,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 18:23:26,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200554189] [2022-03-20 18:23:26,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:23:26,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 18:23:26,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:23:26,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 18:23:26,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=5334, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 18:23:26,995 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 75 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 74 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:23:35,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:23:35,241 INFO L93 Difference]: Finished difference Result 174 states and 180 transitions. [2022-03-20 18:23:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 18:23:35,242 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 74 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-03-20 18:23:35,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:23:35,243 INFO L225 Difference]: With dead ends: 174 [2022-03-20 18:23:35,243 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 18:23:35,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2621 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=792, Invalid=20670, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 18:23:35,244 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 6194 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 6404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 6194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:23:35,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 352 Invalid, 6404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 6194 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-03-20 18:23:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 18:23:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 158. [2022-03-20 18:23:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 152 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:23:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2022-03-20 18:23:35,304 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 84 [2022-03-20 18:23:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:23:35,305 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2022-03-20 18:23:35,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 74 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:23:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2022-03-20 18:23:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 18:23:35,305 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:23:35,305 INFO L499 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:23:35,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-03-20 18:23:35,305 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:23:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:23:35,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1264697094, now seen corresponding path program 68 times [2022-03-20 18:23:35,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:23:35,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1566327669] [2022-03-20 18:23:35,525 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:23:35,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1190070779, now seen corresponding path program 1 times [2022-03-20 18:23:35,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:23:35,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969353045] [2022-03-20 18:23:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:23:35,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:23:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:23:35,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:23:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:23:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:23:35,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:23:35,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969353045] [2022-03-20 18:23:35,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969353045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:23:35,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:23:35,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:23:38,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:23:38,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1566327669] [2022-03-20 18:23:38,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1566327669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:23:38,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:23:38,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 18:23:38,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061718589] [2022-03-20 18:23:38,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:23:38,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 18:23:38,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:23:38,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 18:23:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=5696, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 18:23:38,112 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 76 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:23:45,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:23:45,651 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2022-03-20 18:23:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 18:23:45,652 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-20 18:23:45,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:23:45,653 INFO L225 Difference]: With dead ends: 176 [2022-03-20 18:23:45,653 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 18:23:45,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2974 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=449, Invalid=21307, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 18:23:45,654 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 6344 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 6423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 6344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:23:45,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 380 Invalid, 6423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 6344 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-20 18:23:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 18:23:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 159. [2022-03-20 18:23:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 153 states have (on average 1.026143790849673) internal successors, (157), 153 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:23:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2022-03-20 18:23:45,716 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 85 [2022-03-20 18:23:45,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:23:45,717 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2022-03-20 18:23:45,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:23:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2022-03-20 18:23:45,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 18:23:45,717 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:23:45,717 INFO L499 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:23:45,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-03-20 18:23:45,717 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:23:45,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:23:45,717 INFO L85 PathProgramCache]: Analyzing trace with hash -463525178, now seen corresponding path program 68 times [2022-03-20 18:23:45,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:23:45,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725425434] [2022-03-20 18:23:45,899 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:23:45,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1843639428, now seen corresponding path program 1 times [2022-03-20 18:23:45,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:23:45,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910361526] [2022-03-20 18:23:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:23:45,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:23:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:23:45,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:23:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:23:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:23:45,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:23:45,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910361526] [2022-03-20 18:23:45,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910361526] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:23:45,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:23:45,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:23:48,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:23:48,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725425434] [2022-03-20 18:23:48,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725425434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:23:48,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:23:48,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 18:23:48,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217092422] [2022-03-20 18:23:48,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:23:48,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 18:23:48,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:23:48,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 18:23:48,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5481, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:23:48,589 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 76 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:23:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:23:56,544 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2022-03-20 18:23:56,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 18:23:56,545 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-20 18:23:56,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:23:56,545 INFO L225 Difference]: With dead ends: 176 [2022-03-20 18:23:56,545 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 18:23:56,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=803, Invalid=21249, Unknown=0, NotChecked=0, Total=22052 [2022-03-20 18:23:56,547 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 5740 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 5953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 5740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:23:56,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 146 Invalid, 5953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 5740 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-20 18:23:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 18:23:56,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2022-03-20 18:23:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.025974025974026) internal successors, (158), 154 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:23:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-03-20 18:23:56,601 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 85 [2022-03-20 18:23:56,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:23:56,601 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-03-20 18:23:56,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:23:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-03-20 18:23:56,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 18:23:56,601 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:23:56,602 INFO L499 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:23:56,602 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-03-20 18:23:56,602 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:23:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:23:56,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1789265668, now seen corresponding path program 69 times [2022-03-20 18:23:56,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:23:56,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2129204325] [2022-03-20 18:23:56,792 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:23:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash -616008059, now seen corresponding path program 1 times [2022-03-20 18:23:56,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:23:56,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367118623] [2022-03-20 18:23:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:23:56,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:23:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:23:56,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:23:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:23:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:23:56,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:23:56,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367118623] [2022-03-20 18:23:56,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367118623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:23:56,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:23:56,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:23:59,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:23:59,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2129204325] [2022-03-20 18:23:59,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2129204325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:23:59,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:23:59,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 18:23:59,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860571715] [2022-03-20 18:23:59,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:23:59,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 18:23:59,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:23:59,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 18:23:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=5848, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 18:23:59,499 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 77 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 76 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:24:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:24:07,709 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2022-03-20 18:24:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 18:24:07,711 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 76 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-03-20 18:24:07,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:24:07,712 INFO L225 Difference]: With dead ends: 178 [2022-03-20 18:24:07,712 INFO L226 Difference]: Without dead ends: 166 [2022-03-20 18:24:07,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3052 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=455, Invalid=21895, Unknown=0, NotChecked=0, Total=22350 [2022-03-20 18:24:07,713 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 6486 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 6566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 6486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:24:07,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 381 Invalid, 6566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 6486 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-03-20 18:24:07,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-20 18:24:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2022-03-20 18:24:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:24:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2022-03-20 18:24:07,767 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 86 [2022-03-20 18:24:07,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:24:07,767 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2022-03-20 18:24:07,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 76 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:24:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2022-03-20 18:24:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 18:24:07,768 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:24:07,768 INFO L499 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:24:07,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-03-20 18:24:07,768 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:24:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:24:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash 692608739, now seen corresponding path program 69 times [2022-03-20 18:24:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:24:07,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [583359805] [2022-03-20 18:24:07,908 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:24:07,908 INFO L85 PathProgramCache]: Analyzing trace with hash -520006396, now seen corresponding path program 1 times [2022-03-20 18:24:07,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:24:07,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363055164] [2022-03-20 18:24:07,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:24:07,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:24:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:24:07,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:24:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:24:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:24:07,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:24:07,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363055164] [2022-03-20 18:24:07,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363055164] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:24:07,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:24:07,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:24:10,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:24:10,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [583359805] [2022-03-20 18:24:10,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [583359805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:24:10,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:24:10,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 18:24:10,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458502259] [2022-03-20 18:24:10,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:24:10,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 18:24:10,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:24:10,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 18:24:10,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=5630, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 18:24:10,743 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 77 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 76 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:24:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:24:19,592 INFO L93 Difference]: Finished difference Result 178 states and 184 transitions. [2022-03-20 18:24:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 18:24:19,596 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 76 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-03-20 18:24:19,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:24:19,596 INFO L225 Difference]: With dead ends: 178 [2022-03-20 18:24:19,596 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 18:24:19,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=814, Invalid=21836, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 18:24:19,598 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 6276 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 6492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 6276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:24:19,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 277 Invalid, 6492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 6276 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-03-20 18:24:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 18:24:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 162. [2022-03-20 18:24:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:24:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2022-03-20 18:24:19,654 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 86 [2022-03-20 18:24:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:24:19,654 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2022-03-20 18:24:19,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 76 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:24:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2022-03-20 18:24:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 18:24:19,654 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:24:19,654 INFO L499 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:24:19,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-03-20 18:24:19,654 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:24:19,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:24:19,655 INFO L85 PathProgramCache]: Analyzing trace with hash 871022278, now seen corresponding path program 70 times [2022-03-20 18:24:19,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:24:19,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [633571147] [2022-03-20 18:24:19,858 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:24:19,858 INFO L85 PathProgramCache]: Analyzing trace with hash -41945339, now seen corresponding path program 1 times [2022-03-20 18:24:19,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:24:19,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442220664] [2022-03-20 18:24:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:24:19,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:24:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:24:19,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:24:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:24:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:24:19,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:24:19,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442220664] [2022-03-20 18:24:19,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442220664] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:24:19,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:24:19,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:24:22,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:24:22,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [633571147] [2022-03-20 18:24:22,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [633571147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:24:22,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:24:22,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 18:24:22,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512259559] [2022-03-20 18:24:22,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:24:22,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 18:24:22,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:24:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 18:24:22,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6002, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 18:24:22,403 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand has 78 states, 78 states have (on average 1.064102564102564) internal successors, (83), 77 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:24:31,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:24:31,318 INFO L93 Difference]: Finished difference Result 180 states and 187 transitions. [2022-03-20 18:24:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 18:24:31,322 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.064102564102564) internal successors, (83), 77 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-20 18:24:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:24:31,322 INFO L225 Difference]: With dead ends: 180 [2022-03-20 18:24:31,322 INFO L226 Difference]: Without dead ends: 168 [2022-03-20 18:24:31,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3131 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=461, Invalid=22491, Unknown=0, NotChecked=0, Total=22952 [2022-03-20 18:24:31,324 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 6750 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 6831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 6750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:24:31,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 395 Invalid, 6831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 6750 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-03-20 18:24:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-20 18:24:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 163. [2022-03-20 18:24:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 157 states have (on average 1.0254777070063694) internal successors, (161), 157 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:24:31,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2022-03-20 18:24:31,383 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 87 [2022-03-20 18:24:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:24:31,383 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2022-03-20 18:24:31,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.064102564102564) internal successors, (83), 77 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:24:31,384 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2022-03-20 18:24:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 18:24:31,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:24:31,384 INFO L499 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:24:31,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-03-20 18:24:31,384 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:24:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:24:31,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2121945498, now seen corresponding path program 70 times [2022-03-20 18:24:31,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:24:31,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1460123340] [2022-03-20 18:24:31,575 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:24:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1411315076, now seen corresponding path program 1 times [2022-03-20 18:24:31,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:24:31,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117584571] [2022-03-20 18:24:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:24:31,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:24:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:24:31,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:24:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:24:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:24:31,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:24:31,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117584571] [2022-03-20 18:24:31,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117584571] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:24:31,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:24:31,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:24:34,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:24:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1460123340] [2022-03-20 18:24:34,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1460123340] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:24:34,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:24:34,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 18:24:34,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226909774] [2022-03-20 18:24:34,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:24:34,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 18:24:34,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:24:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 18:24:34,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=5781, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 18:24:34,589 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 78 states, 78 states have (on average 1.064102564102564) internal successors, (83), 77 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:24:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:24:43,559 INFO L93 Difference]: Finished difference Result 180 states and 186 transitions. [2022-03-20 18:24:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 18:24:43,561 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.064102564102564) internal successors, (83), 77 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-20 18:24:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:24:43,562 INFO L225 Difference]: With dead ends: 180 [2022-03-20 18:24:43,562 INFO L226 Difference]: Without dead ends: 169 [2022-03-20 18:24:43,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2843 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=825, Invalid=22431, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 18:24:43,570 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 6644 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 6863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 6644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:24:43,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 382 Invalid, 6863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 6644 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-03-20 18:24:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-20 18:24:43,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2022-03-20 18:24:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:24:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 167 transitions. [2022-03-20 18:24:43,627 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 167 transitions. Word has length 87 [2022-03-20 18:24:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:24:43,627 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 167 transitions. [2022-03-20 18:24:43,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.064102564102564) internal successors, (83), 77 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:24:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 167 transitions. [2022-03-20 18:24:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 18:24:43,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:24:43,628 INFO L499 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:24:43,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-03-20 18:24:43,628 INFO L403 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:24:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:24:43,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1824719036, now seen corresponding path program 71 times [2022-03-20 18:24:43,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:24:43,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [375998449] [2022-03-20 18:24:43,863 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:24:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash 532117381, now seen corresponding path program 1 times [2022-03-20 18:24:43,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:24:43,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102231326] [2022-03-20 18:24:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:24:43,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:24:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:24:43,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:24:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:24:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:24:43,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:24:43,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102231326] [2022-03-20 18:24:43,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102231326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:24:43,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:24:43,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:24:46,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:24:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [375998449] [2022-03-20 18:24:46,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [375998449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:24:46,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:24:46,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 18:24:46,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575476473] [2022-03-20 18:24:46,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:24:46,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 18:24:46,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:24:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 18:24:46,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6158, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 18:24:46,747 INFO L87 Difference]: Start difference. First operand 164 states and 167 transitions. Second operand has 79 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 78 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:24:55,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:24:55,835 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2022-03-20 18:24:55,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 18:24:55,836 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 78 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-03-20 18:24:55,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:24:55,836 INFO L225 Difference]: With dead ends: 182 [2022-03-20 18:24:55,836 INFO L226 Difference]: Without dead ends: 170 [2022-03-20 18:24:55,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3211 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=467, Invalid=23095, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 18:24:55,837 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 6916 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 6998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 6916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:24:55,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 400 Invalid, 6998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 6916 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-03-20 18:24:55,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-20 18:24:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2022-03-20 18:24:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 159 states have (on average 1.0251572327044025) internal successors, (163), 159 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:24:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-03-20 18:24:55,894 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 88 [2022-03-20 18:24:55,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:24:55,895 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-03-20 18:24:55,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 78 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:24:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-03-20 18:24:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 18:24:55,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:24:55,895 INFO L499 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:24:55,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-03-20 18:24:55,895 INFO L403 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:24:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:24:55,895 INFO L85 PathProgramCache]: Analyzing trace with hash 821186371, now seen corresponding path program 71 times [2022-03-20 18:24:55,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:24:55,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1760111142] [2022-03-20 18:24:56,128 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:24:56,128 INFO L85 PathProgramCache]: Analyzing trace with hash -952330748, now seen corresponding path program 1 times [2022-03-20 18:24:56,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:24:56,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016859128] [2022-03-20 18:24:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:24:56,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:24:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:24:56,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:24:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:24:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:24:56,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:24:56,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016859128] [2022-03-20 18:24:56,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016859128] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:24:56,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:24:56,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:24:59,106 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:24:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1760111142] [2022-03-20 18:24:59,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1760111142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:24:59,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:24:59,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 18:24:59,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329424756] [2022-03-20 18:24:59,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:24:59,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 18:24:59,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:24:59,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 18:24:59,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=5934, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 18:24:59,108 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 79 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 78 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:25:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:08,076 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2022-03-20 18:25:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 18:25:08,080 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 78 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-03-20 18:25:08,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:08,081 INFO L225 Difference]: With dead ends: 182 [2022-03-20 18:25:08,081 INFO L226 Difference]: Without dead ends: 171 [2022-03-20 18:25:08,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=836, Invalid=23034, Unknown=0, NotChecked=0, Total=23870 [2022-03-20 18:25:08,082 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 6683 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 6905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 6683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:08,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 342 Invalid, 6905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 6683 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-03-20 18:25:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-20 18:25:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 166. [2022-03-20 18:25:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:25:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2022-03-20 18:25:08,141 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 88 [2022-03-20 18:25:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:08,141 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2022-03-20 18:25:08,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 78 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:25:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2022-03-20 18:25:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 18:25:08,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:08,142 INFO L499 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:08,142 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-03-20 18:25:08,142 INFO L403 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash 506646150, now seen corresponding path program 72 times [2022-03-20 18:25:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:08,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [180077196] [2022-03-20 18:25:08,322 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:25:08,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1106180101, now seen corresponding path program 1 times [2022-03-20 18:25:08,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:08,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331713543] [2022-03-20 18:25:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:08,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:08,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:08,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:08,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331713543] [2022-03-20 18:25:08,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331713543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:08,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:08,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:25:11,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:11,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [180077196] [2022-03-20 18:25:11,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [180077196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:11,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:11,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 18:25:11,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332547295] [2022-03-20 18:25:11,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:11,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 18:25:11,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:11,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 18:25:11,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=6316, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 18:25:11,329 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 80 states, 80 states have (on average 1.0625) internal successors, (85), 79 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:25:20,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:20,720 INFO L93 Difference]: Finished difference Result 184 states and 191 transitions. [2022-03-20 18:25:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 18:25:20,721 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.0625) internal successors, (85), 79 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-20 18:25:20,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:20,721 INFO L225 Difference]: With dead ends: 184 [2022-03-20 18:25:20,722 INFO L226 Difference]: Without dead ends: 172 [2022-03-20 18:25:20,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3292 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=473, Invalid=23707, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 18:25:20,723 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 7084 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 7167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 7084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:20,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 405 Invalid, 7167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 7084 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-03-20 18:25:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-20 18:25:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2022-03-20 18:25:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 161 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:25:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2022-03-20 18:25:20,784 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 89 [2022-03-20 18:25:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:20,784 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2022-03-20 18:25:20,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.0625) internal successors, (85), 79 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:25:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2022-03-20 18:25:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 18:25:20,784 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:20,785 INFO L499 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:20,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-03-20 18:25:20,791 INFO L403 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:20,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:20,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1863961094, now seen corresponding path program 72 times [2022-03-20 18:25:20,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:20,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [773589724] [2022-03-20 18:25:20,923 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:25:20,923 INFO L85 PathProgramCache]: Analyzing trace with hash 978990724, now seen corresponding path program 1 times [2022-03-20 18:25:20,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:20,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887177439] [2022-03-20 18:25:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:20,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:20,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:20,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:20,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887177439] [2022-03-20 18:25:20,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887177439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:20,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:20,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:25:23,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:23,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [773589724] [2022-03-20 18:25:23,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [773589724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:23,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:23,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 18:25:23,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869575762] [2022-03-20 18:25:23,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:23,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 18:25:23,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:23,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 18:25:23,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=6089, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 18:25:23,969 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 80 states, 80 states have (on average 1.0625) internal successors, (85), 79 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:25:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:34,745 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2022-03-20 18:25:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 18:25:34,746 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.0625) internal successors, (85), 79 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-20 18:25:34,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:34,746 INFO L225 Difference]: With dead ends: 184 [2022-03-20 18:25:34,746 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 18:25:34,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2996 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=847, Invalid=23645, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 18:25:34,748 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 6891 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 7116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 6891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:34,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 386 Invalid, 7116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 6891 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-03-20 18:25:34,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 18:25:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2022-03-20 18:25:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 162 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:25:34,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2022-03-20 18:25:34,823 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 89 [2022-03-20 18:25:34,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:34,823 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2022-03-20 18:25:34,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.0625) internal successors, (85), 79 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:25:34,823 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2022-03-20 18:25:34,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 18:25:34,824 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:34,824 INFO L499 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:34,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-03-20 18:25:34,824 INFO L403 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:34,824 INFO L85 PathProgramCache]: Analyzing trace with hash -235477116, now seen corresponding path program 73 times [2022-03-20 18:25:34,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:34,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [147380572] [2022-03-20 18:25:35,144 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:25:35,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1680242821, now seen corresponding path program 1 times [2022-03-20 18:25:35,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:35,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275799083] [2022-03-20 18:25:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:35,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:35,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:35,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:35,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275799083] [2022-03-20 18:25:35,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275799083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:35,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:35,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:25:37,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:37,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [147380572] [2022-03-20 18:25:37,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [147380572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:37,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:37,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 18:25:37,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995790858] [2022-03-20 18:25:37,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:37,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 18:25:37,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 18:25:37,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=6476, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:25:37,699 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand has 81 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 80 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:25:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:25:48,150 INFO L93 Difference]: Finished difference Result 186 states and 193 transitions. [2022-03-20 18:25:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 18:25:48,151 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 80 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-03-20 18:25:48,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:25:48,152 INFO L225 Difference]: With dead ends: 186 [2022-03-20 18:25:48,152 INFO L226 Difference]: Without dead ends: 174 [2022-03-20 18:25:48,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3374 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=479, Invalid=24327, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 18:25:48,153 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 7254 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 7338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 7254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:25:48,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 410 Invalid, 7338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 7254 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-03-20 18:25:48,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-20 18:25:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2022-03-20 18:25:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.0245398773006136) internal successors, (167), 163 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:25:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2022-03-20 18:25:48,214 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 90 [2022-03-20 18:25:48,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:25:48,214 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2022-03-20 18:25:48,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 80 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:25:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2022-03-20 18:25:48,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 18:25:48,214 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:25:48,214 INFO L499 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:25:48,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-03-20 18:25:48,214 INFO L403 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:25:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:25:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash -169760861, now seen corresponding path program 73 times [2022-03-20 18:25:48,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:48,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1749599019] [2022-03-20 18:25:48,452 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:25:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1384655100, now seen corresponding path program 1 times [2022-03-20 18:25:48,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:25:48,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272724880] [2022-03-20 18:25:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:25:48,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:25:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:48,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:25:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:25:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:25:48,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:25:48,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272724880] [2022-03-20 18:25:48,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272724880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:48,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:48,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:25:51,768 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:25:51,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1749599019] [2022-03-20 18:25:51,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1749599019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:25:51,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:25:51,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 18:25:51,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52927532] [2022-03-20 18:25:51,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:25:51,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 18:25:51,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:25:51,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 18:25:51,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=6246, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 18:25:51,770 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand has 81 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 80 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:26:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:26:02,213 INFO L93 Difference]: Finished difference Result 186 states and 192 transitions. [2022-03-20 18:26:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 18:26:02,217 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 80 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-03-20 18:26:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:26:02,217 INFO L225 Difference]: With dead ends: 186 [2022-03-20 18:26:02,217 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 18:26:02,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3074 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=858, Invalid=24264, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 18:26:02,219 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6513 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 6741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 6513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:26:02,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 151 Invalid, 6741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 6513 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-03-20 18:26:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 18:26:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2022-03-20 18:26:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:26:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2022-03-20 18:26:02,281 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 90 [2022-03-20 18:26:02,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:26:02,281 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2022-03-20 18:26:02,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 80 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:26:02,281 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2022-03-20 18:26:02,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 18:26:02,281 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:26:02,281 INFO L499 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:26:02,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-03-20 18:26:02,281 INFO L403 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:26:02,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:26:02,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1766461882, now seen corresponding path program 74 times [2022-03-20 18:26:02,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:26:02,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1827154006] [2022-03-20 18:26:02,557 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:26:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2040661755, now seen corresponding path program 1 times [2022-03-20 18:26:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:26:02,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273133861] [2022-03-20 18:26:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:26:02,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:26:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:26:02,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:26:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:26:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:26:02,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:26:02,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273133861] [2022-03-20 18:26:02,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273133861] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:26:02,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:26:02,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:26:05,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:26:05,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1827154006] [2022-03-20 18:26:05,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1827154006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:26:05,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:26:05,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 18:26:05,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948120169] [2022-03-20 18:26:05,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:26:05,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 18:26:05,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:26:05,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 18:26:05,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=6638, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 18:26:05,402 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand has 82 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 81 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:26:15,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:26:15,606 INFO L93 Difference]: Finished difference Result 188 states and 195 transitions. [2022-03-20 18:26:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 18:26:15,609 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 81 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-03-20 18:26:15,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:26:15,610 INFO L225 Difference]: With dead ends: 188 [2022-03-20 18:26:15,610 INFO L226 Difference]: Without dead ends: 176 [2022-03-20 18:26:15,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=485, Invalid=24955, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 18:26:15,611 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 7416 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 7501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 7416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:26:15,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 411 Invalid, 7501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 7416 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-03-20 18:26:15,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-20 18:26:15,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 171. [2022-03-20 18:26:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 165 states have (on average 1.0242424242424242) internal successors, (169), 165 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:26:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2022-03-20 18:26:15,674 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 91 [2022-03-20 18:26:15,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:26:15,674 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2022-03-20 18:26:15,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 81 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:26:15,674 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2022-03-20 18:26:15,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 18:26:15,674 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:26:15,675 INFO L499 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:26:15,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-03-20 18:26:15,675 INFO L403 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:26:15,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:26:15,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1209367974, now seen corresponding path program 74 times [2022-03-20 18:26:15,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:26:15,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [994462582] [2022-03-20 18:26:15,823 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:26:15,823 INFO L85 PathProgramCache]: Analyzing trace with hash 546666372, now seen corresponding path program 1 times [2022-03-20 18:26:15,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:26:15,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665295527] [2022-03-20 18:26:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:26:15,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:26:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:26:15,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:26:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:26:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:26:15,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:26:15,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665295527] [2022-03-20 18:26:15,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665295527] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:26:15,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:26:15,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:26:19,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:26:19,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [994462582] [2022-03-20 18:26:19,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [994462582] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:26:19,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:26:19,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 18:26:19,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845208720] [2022-03-20 18:26:19,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:26:19,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 18:26:19,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:26:19,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 18:26:19,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=6405, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:26:19,236 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 82 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 81 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:26:30,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:26:30,837 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2022-03-20 18:26:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 18:26:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 81 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-03-20 18:26:30,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:26:30,842 INFO L225 Difference]: With dead ends: 188 [2022-03-20 18:26:30,842 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 18:26:30,843 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3153 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=869, Invalid=24891, Unknown=0, NotChecked=0, Total=25760 [2022-03-20 18:26:30,843 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 7203 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 7434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 7203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:26:30,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 386 Invalid, 7434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 7203 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-03-20 18:26:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 18:26:30,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2022-03-20 18:26:30,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 166 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:26:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2022-03-20 18:26:30,906 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 91 [2022-03-20 18:26:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:26:30,907 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2022-03-20 18:26:30,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 81 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:26:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2022-03-20 18:26:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 18:26:30,907 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:26:30,907 INFO L499 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:26:30,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-03-20 18:26:30,907 INFO L403 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:26:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:26:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1982349372, now seen corresponding path program 75 times [2022-03-20 18:26:30,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:26:30,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1528039500] [2022-03-20 18:26:31,124 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:26:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1466599035, now seen corresponding path program 1 times [2022-03-20 18:26:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:26:31,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758259470] [2022-03-20 18:26:31,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:26:31,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:26:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:26:31,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:26:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:26:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:26:31,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:26:31,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758259470] [2022-03-20 18:26:31,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758259470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:26:31,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:26:31,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:26:34,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:26:34,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1528039500] [2022-03-20 18:26:34,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1528039500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:26:34,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:26:34,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 18:26:34,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296750903] [2022-03-20 18:26:34,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:26:34,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 18:26:34,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:26:34,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 18:26:34,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=6802, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 18:26:34,352 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 83 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 82 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:26:44,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:26:44,401 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2022-03-20 18:26:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 18:26:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 82 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-03-20 18:26:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:26:44,406 INFO L225 Difference]: With dead ends: 190 [2022-03-20 18:26:44,406 INFO L226 Difference]: Without dead ends: 178 [2022-03-20 18:26:44,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3541 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=491, Invalid=25591, Unknown=0, NotChecked=0, Total=26082 [2022-03-20 18:26:44,408 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 7678 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 7764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 7678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:26:44,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 421 Invalid, 7764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 7678 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-03-20 18:26:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-20 18:26:44,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2022-03-20 18:26:44,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 167 states have (on average 1.0239520958083832) internal successors, (171), 167 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:26:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2022-03-20 18:26:44,472 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 92 [2022-03-20 18:26:44,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:26:44,472 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2022-03-20 18:26:44,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 82 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:26:44,473 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2022-03-20 18:26:44,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 18:26:44,473 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:26:44,473 INFO L499 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:26:44,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-03-20 18:26:44,473 INFO L403 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:26:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:26:44,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1012688899, now seen corresponding path program 75 times [2022-03-20 18:26:44,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:26:44,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220097294] [2022-03-20 18:26:44,610 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:26:44,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1816979452, now seen corresponding path program 1 times [2022-03-20 18:26:44,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:26:44,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340439772] [2022-03-20 18:26:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:26:44,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:26:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:26:44,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:26:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:26:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:26:44,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:26:44,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340439772] [2022-03-20 18:26:44,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340439772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:26:44,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:26:44,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:26:48,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:26:48,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220097294] [2022-03-20 18:26:48,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220097294] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:26:48,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:26:48,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 18:26:48,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627057315] [2022-03-20 18:26:48,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:26:48,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 18:26:48,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:26:48,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 18:26:48,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=6566, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 18:26:48,043 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 83 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 82 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:26:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:26:59,259 INFO L93 Difference]: Finished difference Result 190 states and 196 transitions. [2022-03-20 18:26:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 18:26:59,261 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 82 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-03-20 18:26:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:26:59,262 INFO L225 Difference]: With dead ends: 190 [2022-03-20 18:26:59,262 INFO L226 Difference]: Without dead ends: 179 [2022-03-20 18:26:59,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=880, Invalid=25526, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 18:26:59,263 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 7431 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 7665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 7431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:26:59,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 357 Invalid, 7665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 7431 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-03-20 18:26:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-20 18:26:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2022-03-20 18:26:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 168 states have (on average 1.0238095238095237) internal successors, (172), 168 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:26:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 177 transitions. [2022-03-20 18:26:59,328 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 177 transitions. Word has length 92 [2022-03-20 18:26:59,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:26:59,328 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 177 transitions. [2022-03-20 18:26:59,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 82 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:26:59,328 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 177 transitions. [2022-03-20 18:26:59,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 18:26:59,329 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:26:59,329 INFO L499 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:26:59,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-03-20 18:26:59,329 INFO L403 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:26:59,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:26:59,329 INFO L85 PathProgramCache]: Analyzing trace with hash -84926970, now seen corresponding path program 76 times [2022-03-20 18:26:59,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:26:59,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1938794964] [2022-03-20 18:26:59,566 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:26:59,567 INFO L85 PathProgramCache]: Analyzing trace with hash -892536315, now seen corresponding path program 1 times [2022-03-20 18:26:59,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:26:59,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049927089] [2022-03-20 18:26:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:26:59,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:26:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:26:59,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:26:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:26:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:26:59,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:26:59,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049927089] [2022-03-20 18:26:59,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049927089] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:26:59,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:26:59,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:27:02,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:02,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1938794964] [2022-03-20 18:27:02,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1938794964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:02,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:02,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 18:27:02,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633419286] [2022-03-20 18:27:02,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:02,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 18:27:02,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:02,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 18:27:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=6968, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 18:27:02,781 INFO L87 Difference]: Start difference. First operand 174 states and 177 transitions. Second operand has 84 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 83 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:14,170 INFO L93 Difference]: Finished difference Result 192 states and 199 transitions. [2022-03-20 18:27:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 18:27:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 83 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-20 18:27:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:14,175 INFO L225 Difference]: With dead ends: 192 [2022-03-20 18:27:14,176 INFO L226 Difference]: Without dead ends: 180 [2022-03-20 18:27:14,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=497, Invalid=26235, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 18:27:14,177 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 7592 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 7679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 7592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:14,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 415 Invalid, 7679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 7592 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-03-20 18:27:14,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-20 18:27:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2022-03-20 18:27:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 169 states have (on average 1.0236686390532543) internal successors, (173), 169 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:27:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-03-20 18:27:14,249 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 93 [2022-03-20 18:27:14,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:14,249 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-03-20 18:27:14,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 83 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:14,249 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-03-20 18:27:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 18:27:14,249 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:14,250 INFO L499 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:14,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-03-20 18:27:14,250 INFO L403 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:14,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash -789395130, now seen corresponding path program 76 times [2022-03-20 18:27:14,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:14,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1795299069] [2022-03-20 18:27:14,467 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:14,468 INFO L85 PathProgramCache]: Analyzing trace with hash 114342020, now seen corresponding path program 1 times [2022-03-20 18:27:14,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:14,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142187309] [2022-03-20 18:27:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:14,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:14,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:14,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:14,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142187309] [2022-03-20 18:27:14,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142187309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:14,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:14,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:27:17,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:17,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1795299069] [2022-03-20 18:27:17,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1795299069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:17,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:17,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 18:27:17,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538037456] [2022-03-20 18:27:17,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:17,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 18:27:17,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 18:27:17,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=6729, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 18:27:17,674 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 84 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 83 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:30,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:30,096 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2022-03-20 18:27:30,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 18:27:30,101 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 83 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-20 18:27:30,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:30,102 INFO L225 Difference]: With dead ends: 192 [2022-03-20 18:27:30,102 INFO L226 Difference]: Without dead ends: 181 [2022-03-20 18:27:30,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3314 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=891, Invalid=26169, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 18:27:30,104 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 7720 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 7957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 7720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:30,104 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 402 Invalid, 7957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 7720 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-03-20 18:27:30,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-20 18:27:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 176. [2022-03-20 18:27:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:27:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 179 transitions. [2022-03-20 18:27:30,179 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 179 transitions. Word has length 93 [2022-03-20 18:27:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:30,179 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 179 transitions. [2022-03-20 18:27:30,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 83 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 179 transitions. [2022-03-20 18:27:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 18:27:30,180 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:30,180 INFO L499 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:30,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-03-20 18:27:30,180 INFO L403 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1394374652, now seen corresponding path program 77 times [2022-03-20 18:27:30,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:30,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [826110597] [2022-03-20 18:27:30,424 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:30,424 INFO L85 PathProgramCache]: Analyzing trace with hash -318473595, now seen corresponding path program 1 times [2022-03-20 18:27:30,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:30,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367968921] [2022-03-20 18:27:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:30,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:30,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:30,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:30,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367968921] [2022-03-20 18:27:30,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367968921] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:30,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:30,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:27:33,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:33,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [826110597] [2022-03-20 18:27:33,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [826110597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:33,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:33,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 18:27:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173221602] [2022-03-20 18:27:33,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:33,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 18:27:33,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:33,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 18:27:33,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=7136, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 18:27:33,677 INFO L87 Difference]: Start difference. First operand 176 states and 179 transitions. Second operand has 85 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 84 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:44,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:44,839 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2022-03-20 18:27:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 18:27:44,841 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 84 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-03-20 18:27:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:44,841 INFO L225 Difference]: With dead ends: 194 [2022-03-20 18:27:44,841 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 18:27:44,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3712 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=503, Invalid=26887, Unknown=0, NotChecked=0, Total=27390 [2022-03-20 18:27:44,842 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 7857 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 7945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 7857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:44,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 425 Invalid, 7945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 7857 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-03-20 18:27:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 18:27:44,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 177. [2022-03-20 18:27:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 171 states have (on average 1.023391812865497) internal successors, (175), 171 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:27:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2022-03-20 18:27:44,909 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 94 [2022-03-20 18:27:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:44,909 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2022-03-20 18:27:44,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 84 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2022-03-20 18:27:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 18:27:44,909 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:44,909 INFO L499 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:44,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-03-20 18:27:44,909 INFO L403 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:44,910 INFO L85 PathProgramCache]: Analyzing trace with hash -819425181, now seen corresponding path program 77 times [2022-03-20 18:27:44,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:44,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1907880720] [2022-03-20 18:27:45,299 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2045663492, now seen corresponding path program 1 times [2022-03-20 18:27:45,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:45,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589393179] [2022-03-20 18:27:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:45,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:45,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:45,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:45,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589393179] [2022-03-20 18:27:45,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589393179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:45,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:45,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:27:48,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:48,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1907880720] [2022-03-20 18:27:48,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1907880720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:48,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:48,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 18:27:48,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843095101] [2022-03-20 18:27:48,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:48,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 18:27:48,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:48,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 18:27:48,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=6894, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 18:27:48,990 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand has 85 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 84 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:03,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:03,574 INFO L93 Difference]: Finished difference Result 194 states and 200 transitions. [2022-03-20 18:28:03,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 18:28:03,579 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 84 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-03-20 18:28:03,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:03,579 INFO L225 Difference]: With dead ends: 194 [2022-03-20 18:28:03,579 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 18:28:03,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=902, Invalid=26820, Unknown=0, NotChecked=0, Total=27722 [2022-03-20 18:28:03,581 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 7699 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 7939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 7699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:03,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 391 Invalid, 7939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 7699 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-03-20 18:28:03,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 18:28:03,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 178. [2022-03-20 18:28:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:28:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2022-03-20 18:28:03,652 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 94 [2022-03-20 18:28:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:03,652 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2022-03-20 18:28:03,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 84 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:03,652 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2022-03-20 18:28:03,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 18:28:03,653 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:03,653 INFO L499 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:03,653 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-03-20 18:28:03,653 INFO L403 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:03,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:03,653 INFO L85 PathProgramCache]: Analyzing trace with hash 962420166, now seen corresponding path program 78 times [2022-03-20 18:28:03,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:03,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2118563722] [2022-03-20 18:28:03,920 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:03,921 INFO L85 PathProgramCache]: Analyzing trace with hash 255589125, now seen corresponding path program 1 times [2022-03-20 18:28:03,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:03,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236597972] [2022-03-20 18:28:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:03,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:03,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:04,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:04,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236597972] [2022-03-20 18:28:04,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236597972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:04,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:04,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:28:06,980 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:06,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2118563722] [2022-03-20 18:28:06,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2118563722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:06,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:06,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 18:28:06,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34615737] [2022-03-20 18:28:06,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:06,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 18:28:06,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:06,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 18:28:06,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=7306, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 18:28:06,982 INFO L87 Difference]: Start difference. First operand 178 states and 181 transitions. Second operand has 86 states, 86 states have (on average 1.058139534883721) internal successors, (91), 85 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:19,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:19,631 INFO L93 Difference]: Finished difference Result 196 states and 203 transitions. [2022-03-20 18:28:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 18:28:19,637 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.058139534883721) internal successors, (91), 85 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-20 18:28:19,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:19,637 INFO L225 Difference]: With dead ends: 196 [2022-03-20 18:28:19,637 INFO L226 Difference]: Without dead ends: 184 [2022-03-20 18:28:19,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=509, Invalid=27547, Unknown=0, NotChecked=0, Total=28056 [2022-03-20 18:28:19,638 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 7946 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 8035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 7946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:19,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 425 Invalid, 8035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 7946 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-03-20 18:28:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-20 18:28:19,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2022-03-20 18:28:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 173 states have (on average 1.023121387283237) internal successors, (177), 173 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:28:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2022-03-20 18:28:19,706 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 95 [2022-03-20 18:28:19,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:19,707 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2022-03-20 18:28:19,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.058139534883721) internal successors, (91), 85 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2022-03-20 18:28:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 18:28:19,707 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:19,707 INFO L499 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:19,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-03-20 18:28:19,707 INFO L403 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:19,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1750356762, now seen corresponding path program 78 times [2022-03-20 18:28:19,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:19,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336860856] [2022-03-20 18:28:19,882 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:19,882 INFO L85 PathProgramCache]: Analyzing trace with hash -317982332, now seen corresponding path program 1 times [2022-03-20 18:28:19,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:19,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147853464] [2022-03-20 18:28:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:19,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:19,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:19,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:19,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147853464] [2022-03-20 18:28:19,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147853464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:19,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:19,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:28:23,753 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:23,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336860856] [2022-03-20 18:28:23,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336860856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:23,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:23,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 18:28:23,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218767700] [2022-03-20 18:28:23,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:23,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 18:28:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 18:28:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=7061, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 18:28:23,754 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand has 86 states, 86 states have (on average 1.058139534883721) internal successors, (91), 85 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:37,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:37,172 INFO L93 Difference]: Finished difference Result 196 states and 202 transitions. [2022-03-20 18:28:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 18:28:37,173 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.058139534883721) internal successors, (91), 85 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-20 18:28:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:37,173 INFO L225 Difference]: With dead ends: 196 [2022-03-20 18:28:37,173 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 18:28:37,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=913, Invalid=27479, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 18:28:37,175 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 7107 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 7350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 7107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:37,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 101 Invalid, 7350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 7107 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-03-20 18:28:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 18:28:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 180. [2022-03-20 18:28:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 174 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:28:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 183 transitions. [2022-03-20 18:28:37,245 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 183 transitions. Word has length 95 [2022-03-20 18:28:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:37,246 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 183 transitions. [2022-03-20 18:28:37,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.058139534883721) internal successors, (91), 85 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 183 transitions. [2022-03-20 18:28:37,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 18:28:37,246 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:37,246 INFO L499 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:37,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-03-20 18:28:37,246 INFO L403 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:37,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:37,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1008615492, now seen corresponding path program 79 times [2022-03-20 18:28:37,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:37,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1205464242] [2022-03-20 18:28:37,521 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:37,521 INFO L85 PathProgramCache]: Analyzing trace with hash 829651845, now seen corresponding path program 1 times [2022-03-20 18:28:37,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:37,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137059339] [2022-03-20 18:28:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:37,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:37,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:37,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137059339] [2022-03-20 18:28:37,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137059339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:37,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:37,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:28:41,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1205464242] [2022-03-20 18:28:41,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1205464242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:41,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:41,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 18:28:41,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425263207] [2022-03-20 18:28:41,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:41,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 18:28:41,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 18:28:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7478, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:28:41,282 INFO L87 Difference]: Start difference. First operand 180 states and 183 transitions. Second operand has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 86 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:55,488 INFO L93 Difference]: Finished difference Result 198 states and 205 transitions. [2022-03-20 18:28:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 18:28:55,493 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 86 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-03-20 18:28:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:55,495 INFO L225 Difference]: With dead ends: 198 [2022-03-20 18:28:55,495 INFO L226 Difference]: Without dead ends: 186 [2022-03-20 18:28:55,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=515, Invalid=28215, Unknown=0, NotChecked=0, Total=28730 [2022-03-20 18:28:55,497 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 8306 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 8396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 8306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:55,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 436 Invalid, 8396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 8306 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-03-20 18:28:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-20 18:28:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 181. [2022-03-20 18:28:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.022857142857143) internal successors, (179), 175 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:28:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2022-03-20 18:28:55,580 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 96 [2022-03-20 18:28:55,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:55,580 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2022-03-20 18:28:55,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 86 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2022-03-20 18:28:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 18:28:55,581 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:55,581 INFO L499 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:55,581 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-03-20 18:28:55,581 INFO L403 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:55,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:55,581 INFO L85 PathProgramCache]: Analyzing trace with hash -544464701, now seen corresponding path program 79 times [2022-03-20 18:28:55,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:55,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [861396850] [2022-03-20 18:28:55,815 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1613339140, now seen corresponding path program 1 times [2022-03-20 18:28:55,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:55,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157209800] [2022-03-20 18:28:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:55,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:55,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:55,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:55,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157209800] [2022-03-20 18:28:55,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157209800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:55,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:55,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:28:59,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:59,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [861396850] [2022-03-20 18:28:59,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [861396850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:59,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:59,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 18:28:59,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739984187] [2022-03-20 18:28:59,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:59,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 18:28:59,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:59,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 18:28:59,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=7230, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 18:28:59,802 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 86 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:15,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:15,011 INFO L93 Difference]: Finished difference Result 198 states and 204 transitions. [2022-03-20 18:29:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 18:29:15,016 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 86 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-03-20 18:29:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:15,017 INFO L225 Difference]: With dead ends: 198 [2022-03-20 18:29:15,017 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 18:29:15,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=924, Invalid=28146, Unknown=0, NotChecked=0, Total=29070 [2022-03-20 18:29:15,019 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 7319 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 7565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 7319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:15,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 82 Invalid, 7565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 7319 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-03-20 18:29:15,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 18:29:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2022-03-20 18:29:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 176 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:29:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 185 transitions. [2022-03-20 18:29:15,107 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 185 transitions. Word has length 96 [2022-03-20 18:29:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:15,107 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 185 transitions. [2022-03-20 18:29:15,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 86 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 185 transitions. [2022-03-20 18:29:15,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 18:29:15,107 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:15,108 INFO L499 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:15,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-03-20 18:29:15,108 INFO L403 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1854296698, now seen corresponding path program 80 times [2022-03-20 18:29:15,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:15,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [823483694] [2022-03-20 18:29:15,280 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1403714565, now seen corresponding path program 1 times [2022-03-20 18:29:15,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:15,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020162596] [2022-03-20 18:29:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:15,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:15,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:15,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:15,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020162596] [2022-03-20 18:29:15,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020162596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:15,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:15,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:29:19,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:19,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [823483694] [2022-03-20 18:29:19,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [823483694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:19,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:19,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 18:29:19,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790659169] [2022-03-20 18:29:19,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:19,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 18:29:19,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:19,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 18:29:19,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=7652, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 18:29:19,057 INFO L87 Difference]: Start difference. First operand 182 states and 185 transitions. Second operand has 88 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 87 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:33,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:33,404 INFO L93 Difference]: Finished difference Result 200 states and 207 transitions. [2022-03-20 18:29:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 18:29:33,405 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 87 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-03-20 18:29:33,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:33,406 INFO L225 Difference]: With dead ends: 200 [2022-03-20 18:29:33,406 INFO L226 Difference]: Without dead ends: 188 [2022-03-20 18:29:33,407 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3976 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=521, Invalid=28891, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 18:29:33,407 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 8482 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 8573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 8482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:33,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 441 Invalid, 8573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 8482 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-03-20 18:29:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-20 18:29:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 183. [2022-03-20 18:29:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 177 states have (on average 1.0225988700564972) internal successors, (181), 177 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:29:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-03-20 18:29:33,494 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 97 [2022-03-20 18:29:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:33,494 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-03-20 18:29:33,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 87 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:33,494 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-03-20 18:29:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 18:29:33,495 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:33,495 INFO L499 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:33,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-03-20 18:29:33,495 INFO L403 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:33,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:33,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1816516474, now seen corresponding path program 80 times [2022-03-20 18:29:33,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:33,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [774390797] [2022-03-20 18:29:33,630 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash -750306684, now seen corresponding path program 1 times [2022-03-20 18:29:33,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:33,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424175315] [2022-03-20 18:29:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:33,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:33,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:33,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:33,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424175315] [2022-03-20 18:29:33,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424175315] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:33,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:33,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:29:37,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:37,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [774390797] [2022-03-20 18:29:37,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [774390797] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:37,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:37,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 18:29:37,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858641842] [2022-03-20 18:29:37,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:37,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 18:29:37,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:37,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 18:29:37,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=7401, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:29:37,620 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 88 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 87 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:54,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:54,728 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2022-03-20 18:29:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 18:29:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 87 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-03-20 18:29:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:54,732 INFO L225 Difference]: With dead ends: 200 [2022-03-20 18:29:54,732 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 18:29:54,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3648 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=935, Invalid=28821, Unknown=0, NotChecked=0, Total=29756 [2022-03-20 18:29:54,734 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 7432 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 7681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 7432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:54,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 7681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 7432 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2022-03-20 18:29:54,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 18:29:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 184. [2022-03-20 18:29:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 178 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:29:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2022-03-20 18:29:54,820 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 97 [2022-03-20 18:29:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:54,820 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2022-03-20 18:29:54,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 87 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2022-03-20 18:29:54,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 18:29:54,821 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:54,821 INFO L499 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:54,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-03-20 18:29:54,821 INFO L403 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:54,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash -410261372, now seen corresponding path program 81 times [2022-03-20 18:29:54,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:54,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350041428] [2022-03-20 18:29:55,065 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:55,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1977777285, now seen corresponding path program 1 times [2022-03-20 18:29:55,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:55,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072596461] [2022-03-20 18:29:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:55,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:55,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:55,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:55,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072596461] [2022-03-20 18:29:55,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072596461] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:55,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:55,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:29:59,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350041428] [2022-03-20 18:29:59,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350041428] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:59,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:59,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 18:29:59,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721714249] [2022-03-20 18:29:59,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:59,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 18:29:59,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:59,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 18:29:59,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=7828, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 18:29:59,156 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand has 89 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 88 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)