/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:39:42,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:39:42,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:39:42,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:39:42,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:39:42,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:39:42,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:39:42,655 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 20:39:42,662 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:39:42,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:39:42,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:39:42,663 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:39:42,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:39:42,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:39:42,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:39:42,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:39:42,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:39:42,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:39:42,664 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:39:42,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:39:42,665 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:39:42,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:39:42,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:39:42,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:39:42,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:39:42,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:39:42,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:39:42,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:39:42,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:39:42,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:39:42,666 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:39:42,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:39:42,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:39:42,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:39:42,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:39:42,924 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:39:42,925 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:39:42,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2022-01-31 20:39:42,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812af14ce/0ccd261329454a9e823928d9ce94e2a8/FLAG91af4f5ba [2022-01-31 20:39:43,346 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:39:43,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2022-01-31 20:39:43,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812af14ce/0ccd261329454a9e823928d9ce94e2a8/FLAG91af4f5ba [2022-01-31 20:39:43,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812af14ce/0ccd261329454a9e823928d9ce94e2a8 [2022-01-31 20:39:43,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:39:43,363 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:39:43,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:39:43,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:39:43,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:39:43,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:39:43" (1/1) ... [2022-01-31 20:39:43,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dacdcf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:39:43, skipping insertion in model container [2022-01-31 20:39:43,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:39:43" (1/1) ... [2022-01-31 20:39:43,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:39:43,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:39:43,513 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i[808,821] [2022-01-31 20:39:43,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:39:43,527 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:39:43,538 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i[808,821] [2022-01-31 20:39:43,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:39:43,551 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:39:43,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:39:43 WrapperNode [2022-01-31 20:39:43,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:39:43,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:39:43,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:39:43,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:39:43,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:39:43" (1/1) ... [2022-01-31 20:39:43,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:39:43" (1/1) ... [2022-01-31 20:39:43,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:39:43" (1/1) ... [2022-01-31 20:39:43,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:39:43" (1/1) ... [2022-01-31 20:39:43,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:39:43" (1/1) ... [2022-01-31 20:39:43,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:39:43" (1/1) ... [2022-01-31 20:39:43,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:39:43" (1/1) ... [2022-01-31 20:39:43,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:39:43,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:39:43,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:39:43,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:39:43,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:39:43" (1/1) ... [2022-01-31 20:39:43,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:39:43,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:39:43,624 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) [2022-01-31 20:39:43,628 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 [2022-01-31 20:39:43,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:39:43,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:39:43,652 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:39:43,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:39:43,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:39:43,653 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:39:43,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:39:43,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 20:39:43,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 20:39:43,653 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:39:43,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:39:43,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:39:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 20:39:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:39:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:39:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:39:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:39:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:39:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:39:43,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:39:43,708 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:39:43,709 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:39:43,817 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:39:43,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:39:43,821 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 20:39:43,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:39:43 BoogieIcfgContainer [2022-01-31 20:39:43,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:39:43,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:39:43,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:39:43,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:39:43,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:39:43" (1/3) ... [2022-01-31 20:39:43,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bae3f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:39:43, skipping insertion in model container [2022-01-31 20:39:43,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:39:43" (2/3) ... [2022-01-31 20:39:43,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bae3f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:39:43, skipping insertion in model container [2022-01-31 20:39:43,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:39:43" (3/3) ... [2022-01-31 20:39:43,835 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2022-01-31 20:39:43,839 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:39:43,839 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:39:43,891 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:39:43,903 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=JORDAN [2022-01-31 20:39:43,903 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:39:43,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:39:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 20:39:43,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:43,925 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:43,926 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1466806487, now seen corresponding path program 1 times [2022-01-31 20:39:43,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:43,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570372080] [2022-01-31 20:39:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:43,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:43,979 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:44,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:44,075 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:44,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570372080] [2022-01-31 20:39:44,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570372080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:44,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:44,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:39:44,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991396519] [2022-01-31 20:39:44,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:44,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:39:44,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:44,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:39:44,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:39:44,112 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:44,152 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-31 20:39:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:39:44,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 20:39:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:44,159 INFO L225 Difference]: With dead ends: 31 [2022-01-31 20:39:44,159 INFO L226 Difference]: Without dead ends: 14 [2022-01-31 20:39:44,161 INFO L932 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 [2022-01-31 20:39:44,164 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 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 [2022-01-31 20:39:44,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:39:44,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-31 20:39:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-31 20:39:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-01-31 20:39:44,189 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-01-31 20:39:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:44,189 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-01-31 20:39:44,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:44,190 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-01-31 20:39:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 20:39:44,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:44,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:44,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:39:44,191 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:44,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1456647756, now seen corresponding path program 1 times [2022-01-31 20:39:44,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:44,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389352346] [2022-01-31 20:39:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:44,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:44,196 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:39:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:44,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:44,326 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:44,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389352346] [2022-01-31 20:39:44,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1389352346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:44,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:44,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:39:44,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357941822] [2022-01-31 20:39:44,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:44,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:39:44,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:44,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:39:44,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:39:44,331 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:44,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:44,434 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-01-31 20:39:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:39:44,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 20:39:44,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:44,435 INFO L225 Difference]: With dead ends: 22 [2022-01-31 20:39:44,435 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 20:39:44,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:39:44,442 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:44,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:39:44,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 20:39:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 20:39:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-31 20:39:44,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-01-31 20:39:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:44,450 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-31 20:39:44,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-31 20:39:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 20:39:44,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:44,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:44,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:39:44,452 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash 193151625, now seen corresponding path program 1 times [2022-01-31 20:39:44,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:44,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2802344] [2022-01-31 20:39:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:44,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:44,646 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:39:44,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:44,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:44,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2802344] [2022-01-31 20:39:44,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2802344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:44,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:44,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:39:44,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356585774] [2022-01-31 20:39:44,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:44,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:39:44,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:39:44,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:39:44,946 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:45,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:45,291 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-01-31 20:39:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:39:45,291 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 20:39:45,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:45,292 INFO L225 Difference]: With dead ends: 34 [2022-01-31 20:39:45,292 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 20:39:45,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:39:45,294 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:45,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:39:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 20:39:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-01-31 20:39:45,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-31 20:39:45,299 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2022-01-31 20:39:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:45,299 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-31 20:39:45,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-31 20:39:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 20:39:45,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:45,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:45,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:39:45,300 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2046664786, now seen corresponding path program 1 times [2022-01-31 20:39:45,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:45,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813010334] [2022-01-31 20:39:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:45,391 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:45,392 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:39:45,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:45,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:45,545 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:45,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:45,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:45,734 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:45,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813010334] [2022-01-31 20:39:45,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [813010334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:45,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:45,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:39:45,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577961910] [2022-01-31 20:39:45,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:45,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:39:45,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:45,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:39:45,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:39:45,737 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:45,847 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-31 20:39:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:39:45,848 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 20:39:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:45,848 INFO L225 Difference]: With dead ends: 30 [2022-01-31 20:39:45,848 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 20:39:45,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:39:45,850 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:45,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 44 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:39:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 20:39:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 20:39:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 20:39:45,856 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-01-31 20:39:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:45,857 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 20:39:45,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 20:39:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 20:39:45,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:45,858 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:45,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:39:45,858 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:45,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1412427221, now seen corresponding path program 2 times [2022-01-31 20:39:45,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:45,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975875566] [2022-01-31 20:39:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:45,984 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:45,985 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:39:46,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:46,106 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:46,106 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:46,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:46,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:46,365 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975875566] [2022-01-31 20:39:46,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [975875566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:46,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:46,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:39:46,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678265129] [2022-01-31 20:39:46,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:46,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:39:46,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:46,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:39:46,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:39:46,368 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:46,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:46,541 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-01-31 20:39:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:39:46,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 20:39:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:46,542 INFO L225 Difference]: With dead ends: 33 [2022-01-31 20:39:46,542 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 20:39:46,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:39:46,544 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:46,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 59 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:39:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 20:39:46,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 20:39:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:46,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-31 20:39:46,550 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2022-01-31 20:39:46,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:46,550 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-31 20:39:46,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:46,550 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-31 20:39:46,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 20:39:46,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:46,551 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:46,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:39:46,551 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash -402263410, now seen corresponding path program 3 times [2022-01-31 20:39:46,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:46,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927401827] [2022-01-31 20:39:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:46,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:46,628 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:39:46,673 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:46,753 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:46,753 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:46,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:46,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:47,000 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:47,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927401827] [2022-01-31 20:39:47,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [927401827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:47,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:47,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:39:47,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896193880] [2022-01-31 20:39:47,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:47,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:39:47,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:39:47,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:39:47,002 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:47,246 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-01-31 20:39:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:39:47,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 20:39:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:47,247 INFO L225 Difference]: With dead ends: 36 [2022-01-31 20:39:47,248 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 20:39:47,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:39:47,249 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:47,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 84 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:39:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 20:39:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-31 20:39:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-01-31 20:39:47,256 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2022-01-31 20:39:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:47,256 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-01-31 20:39:47,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-01-31 20:39:47,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 20:39:47,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:47,257 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:47,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:39:47,257 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:47,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:47,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1448012981, now seen corresponding path program 4 times [2022-01-31 20:39:47,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:47,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471815734] [2022-01-31 20:39:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:47,334 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:47,334 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:39:47,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:47,459 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:47,460 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:47,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:47,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:47,814 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:47,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471815734] [2022-01-31 20:39:47,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1471815734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:47,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:47,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:39:47,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903209429] [2022-01-31 20:39:47,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:47,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:39:47,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:39:47,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:39:47,816 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:48,126 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-01-31 20:39:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:39:48,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 20:39:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:48,128 INFO L225 Difference]: With dead ends: 39 [2022-01-31 20:39:48,128 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 20:39:48,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:39:48,129 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:48,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 79 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:39:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 20:39:48,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-31 20:39:48,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-01-31 20:39:48,136 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2022-01-31 20:39:48,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:48,136 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-01-31 20:39:48,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-01-31 20:39:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 20:39:48,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:48,137 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:48,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:39:48,138 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash 319282542, now seen corresponding path program 5 times [2022-01-31 20:39:48,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:48,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137452464] [2022-01-31 20:39:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:48,210 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:48,210 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:39:48,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:48,339 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:48,340 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:48,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:48,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:48,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:48,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137452464] [2022-01-31 20:39:48,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [137452464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:48,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:48,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:39:48,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230980013] [2022-01-31 20:39:48,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:48,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:39:48,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:48,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:39:48,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:39:48,708 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:49,116 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-01-31 20:39:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:39:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 20:39:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:49,118 INFO L225 Difference]: With dead ends: 42 [2022-01-31 20:39:49,118 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 20:39:49,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:39:49,119 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:49,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 104 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:39:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 20:39:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 20:39:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-01-31 20:39:49,126 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2022-01-31 20:39:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:49,126 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-01-31 20:39:49,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:49,126 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-01-31 20:39:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 20:39:49,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:49,127 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:49,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:39:49,127 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:49,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2111093867, now seen corresponding path program 6 times [2022-01-31 20:39:49,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:49,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937480127] [2022-01-31 20:39:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:49,213 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:49,213 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:39:49,250 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:49,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:49,316 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:49,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:49,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:49,740 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:49,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937480127] [2022-01-31 20:39:49,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [937480127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:49,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:49,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:39:49,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145852036] [2022-01-31 20:39:49,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:49,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:39:49,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:49,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:39:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:39:49,742 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:50,234 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-01-31 20:39:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:39:50,235 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 20:39:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:50,235 INFO L225 Difference]: With dead ends: 45 [2022-01-31 20:39:50,235 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 20:39:50,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:39:50,237 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:50,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 104 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:39:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 20:39:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-31 20:39:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-01-31 20:39:50,242 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2022-01-31 20:39:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:50,242 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-01-31 20:39:50,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-01-31 20:39:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 20:39:50,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:50,243 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:50,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:39:50,244 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash -186245042, now seen corresponding path program 7 times [2022-01-31 20:39:50,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929930092] [2022-01-31 20:39:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:50,318 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:50,318 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:39:50,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:50,428 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:50,429 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:50,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:50,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:50,904 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:50,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929930092] [2022-01-31 20:39:50,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [929930092] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:50,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:50,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:39:50,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687588975] [2022-01-31 20:39:50,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:50,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:39:50,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:50,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:39:50,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:39:50,906 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:51,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:51,456 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-01-31 20:39:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 20:39:51,457 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 20:39:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:51,457 INFO L225 Difference]: With dead ends: 48 [2022-01-31 20:39:51,457 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 20:39:51,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=224, Invalid=2532, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 20:39:51,463 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:51,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 124 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:39:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 20:39:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 20:39:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-01-31 20:39:51,477 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2022-01-31 20:39:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:51,478 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-01-31 20:39:51,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-01-31 20:39:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 20:39:51,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:51,478 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:51,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 20:39:51,479 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:51,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:51,479 INFO L85 PathProgramCache]: Analyzing trace with hash 94178699, now seen corresponding path program 8 times [2022-01-31 20:39:51,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:51,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504788974] [2022-01-31 20:39:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:51,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:51,544 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:39:51,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:51,667 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:51,667 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:51,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:51,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:52,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:52,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504788974] [2022-01-31 20:39:52,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [504788974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:52,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:52,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:39:52,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682179299] [2022-01-31 20:39:52,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:52,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:39:52,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:52,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:39:52,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:39:52,196 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:52,875 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-01-31 20:39:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 20:39:52,875 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 20:39:52,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:52,875 INFO L225 Difference]: With dead ends: 51 [2022-01-31 20:39:52,875 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 20:39:52,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=251, Invalid=3171, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:39:52,877 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:52,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 134 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:39:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 20:39:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-31 20:39:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-01-31 20:39:52,883 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2022-01-31 20:39:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:52,883 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-01-31 20:39:52,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-01-31 20:39:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 20:39:52,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:52,884 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:52,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 20:39:52,885 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash 486456110, now seen corresponding path program 9 times [2022-01-31 20:39:52,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:52,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649862585] [2022-01-31 20:39:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:52,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:52,941 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:39:52,988 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:53,040 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:53,040 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:53,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:53,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:53,670 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:53,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649862585] [2022-01-31 20:39:53,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [649862585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:53,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:53,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 20:39:53,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944539801] [2022-01-31 20:39:53,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:53,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 20:39:53,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:53,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 20:39:53,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:39:53,671 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 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) [2022-01-31 20:39:54,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:54,559 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-01-31 20:39:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:39:54,560 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 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 [2022-01-31 20:39:54,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:54,561 INFO L225 Difference]: With dead ends: 58 [2022-01-31 20:39:54,561 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 20:39:54,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=284, Invalid=4138, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 20:39:54,562 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:54,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 142 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:39:54,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 20:39:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-01-31 20:39:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-01-31 20:39:54,571 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2022-01-31 20:39:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:54,571 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-01-31 20:39:54,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 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) [2022-01-31 20:39:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-01-31 20:39:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 20:39:54,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:54,572 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:54,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 20:39:54,572 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:54,573 INFO L85 PathProgramCache]: Analyzing trace with hash -176232215, now seen corresponding path program 10 times [2022-01-31 20:39:54,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:54,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766673198] [2022-01-31 20:39:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:54,635 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:54,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:54,695 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:54,736 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:54,817 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:54,817 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:54,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:54,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:55,460 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:55,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766673198] [2022-01-31 20:39:55,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1766673198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:55,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:55,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 20:39:55,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170758992] [2022-01-31 20:39:55,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:55,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 20:39:55,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:55,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 20:39:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:39:55,462 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:56,299 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-01-31 20:39:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 20:39:56,299 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 20:39:56,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:56,300 INFO L225 Difference]: With dead ends: 58 [2022-01-31 20:39:56,300 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 20:39:56,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=299, Invalid=4671, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:39:56,301 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:56,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 132 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:39:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 20:39:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 20:39:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-01-31 20:39:56,313 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-01-31 20:39:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:56,314 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-01-31 20:39:56,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-01-31 20:39:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 20:39:56,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:56,316 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:56,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 20:39:56,319 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:56,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1640537422, now seen corresponding path program 11 times [2022-01-31 20:39:56,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:56,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550261424] [2022-01-31 20:39:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:56,369 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:56,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:56,402 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:56,450 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:56,493 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:56,493 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:56,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:56,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:57,193 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:57,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550261424] [2022-01-31 20:39:57,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1550261424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:57,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:57,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:39:57,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007105983] [2022-01-31 20:39:57,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:57,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:39:57,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:57,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:39:57,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1517, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:39:57,195 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 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) [2022-01-31 20:39:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:39:58,159 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-01-31 20:39:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 20:39:58,160 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 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 [2022-01-31 20:39:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:39:58,160 INFO L225 Difference]: With dead ends: 61 [2022-01-31 20:39:58,160 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 20:39:58,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=5236, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 20:39:58,162 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:39:58,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 152 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:39:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 20:39:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-01-31 20:39:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:39:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-01-31 20:39:58,169 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2022-01-31 20:39:58,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:39:58,169 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-01-31 20:39:58,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 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) [2022-01-31 20:39:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-01-31 20:39:58,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 20:39:58,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:39:58,170 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:39:58,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 20:39:58,170 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:39:58,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:39:58,171 INFO L85 PathProgramCache]: Analyzing trace with hash -153070903, now seen corresponding path program 12 times [2022-01-31 20:39:58,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:39:58,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39531667] [2022-01-31 20:39:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:39:58,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:58,275 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:58,275 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:58,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:58,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:39:58,368 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:39:58,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:39:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:58,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:39:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:39:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:39:59,087 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:39:59,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39531667] [2022-01-31 20:39:59,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [39531667] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:39:59,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:39:59,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:39:59,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488195770] [2022-01-31 20:39:59,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:39:59,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:39:59,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:39:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:39:59,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1678, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:39:59,089 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 42 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) [2022-01-31 20:40:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:00,079 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-01-31 20:40:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 20:40:00,079 INFO L78 Accepts]: Start accepts. Automaton has has 42 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 [2022-01-31 20:40:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:00,080 INFO L225 Difference]: With dead ends: 64 [2022-01-31 20:40:00,080 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 20:40:00,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=329, Invalid=5833, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 20:40:00,082 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:00,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 172 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:40:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 20:40:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-01-31 20:40:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-01-31 20:40:00,094 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2022-01-31 20:40:00,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:00,094 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-01-31 20:40:00,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 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) [2022-01-31 20:40:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-01-31 20:40:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 20:40:00,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:00,095 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:00,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 20:40:00,095 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:00,096 INFO L85 PathProgramCache]: Analyzing trace with hash 149448558, now seen corresponding path program 13 times [2022-01-31 20:40:00,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:00,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226875780] [2022-01-31 20:40:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:00,158 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:00,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:00,189 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:00,240 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:00,294 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:00,294 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:00,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:00,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:01,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:01,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226875780] [2022-01-31 20:40:01,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [226875780] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:01,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:01,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 20:40:01,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323385004] [2022-01-31 20:40:01,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:01,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 20:40:01,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 20:40:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:40:01,066 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 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) [2022-01-31 20:40:02,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:02,071 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-01-31 20:40:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 20:40:02,071 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 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 [2022-01-31 20:40:02,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:02,072 INFO L225 Difference]: With dead ends: 67 [2022-01-31 20:40:02,072 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 20:40:02,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=344, Invalid=6462, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 20:40:02,074 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:02,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 167 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:40:02,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 20:40:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-01-31 20:40:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-01-31 20:40:02,082 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2022-01-31 20:40:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:02,082 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-01-31 20:40:02,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 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) [2022-01-31 20:40:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-01-31 20:40:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 20:40:02,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:02,084 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:02,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 20:40:02,084 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1665324201, now seen corresponding path program 14 times [2022-01-31 20:40:02,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:02,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734835127] [2022-01-31 20:40:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:02,142 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:02,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:02,183 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:02,212 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:02,273 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:02,274 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:02,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:02,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:03,135 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:03,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734835127] [2022-01-31 20:40:03,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734835127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:03,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:03,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:40:03,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579113706] [2022-01-31 20:40:03,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:03,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:40:03,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:40:03,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2024, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:40:03,137 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 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) [2022-01-31 20:40:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:04,280 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-01-31 20:40:04,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 20:40:04,281 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 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 [2022-01-31 20:40:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:04,281 INFO L225 Difference]: With dead ends: 70 [2022-01-31 20:40:04,281 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 20:40:04,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=359, Invalid=7123, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 20:40:04,283 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:04,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 182 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:40:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 20:40:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-01-31 20:40:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-01-31 20:40:04,294 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-01-31 20:40:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:04,295 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-01-31 20:40:04,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 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) [2022-01-31 20:40:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-01-31 20:40:04,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 20:40:04,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:04,295 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:04,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 20:40:04,296 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:04,296 INFO L85 PathProgramCache]: Analyzing trace with hash -464512626, now seen corresponding path program 15 times [2022-01-31 20:40:04,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:04,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769801211] [2022-01-31 20:40:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:04,362 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:04,394 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:04,394 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:04,431 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:04,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:04,497 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:04,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:04,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:05,359 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:05,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769801211] [2022-01-31 20:40:05,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1769801211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:05,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:05,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 20:40:05,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077278277] [2022-01-31 20:40:05,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:05,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 20:40:05,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:05,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 20:40:05,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2209, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:40:05,361 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 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) [2022-01-31 20:40:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:06,630 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-01-31 20:40:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 20:40:06,630 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 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 [2022-01-31 20:40:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:06,630 INFO L225 Difference]: With dead ends: 73 [2022-01-31 20:40:06,631 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 20:40:06,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=374, Invalid=7816, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 20:40:06,632 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:06,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 197 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2106 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:40:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 20:40:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-01-31 20:40:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-01-31 20:40:06,641 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2022-01-31 20:40:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:06,641 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-01-31 20:40:06,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 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) [2022-01-31 20:40:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-01-31 20:40:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 20:40:06,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:06,642 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:06,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 20:40:06,642 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:06,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:06,642 INFO L85 PathProgramCache]: Analyzing trace with hash -881561975, now seen corresponding path program 16 times [2022-01-31 20:40:06,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:06,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653747208] [2022-01-31 20:40:06,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:06,696 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:06,744 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:06,745 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:06,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:06,843 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:06,844 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:06,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:06,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:07,732 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:07,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653747208] [2022-01-31 20:40:07,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [653747208] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:07,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:07,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 20:40:07,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835476996] [2022-01-31 20:40:07,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:07,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 20:40:07,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:07,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 20:40:07,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:40:07,733 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 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) [2022-01-31 20:40:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:09,038 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-01-31 20:40:09,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 20:40:09,039 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 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 [2022-01-31 20:40:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:09,039 INFO L225 Difference]: With dead ends: 76 [2022-01-31 20:40:09,039 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 20:40:09,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2644 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=389, Invalid=8541, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 20:40:09,041 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:09,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 202 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2278 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:40:09,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 20:40:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-01-31 20:40:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-01-31 20:40:09,048 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2022-01-31 20:40:09,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:09,048 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-01-31 20:40:09,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 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) [2022-01-31 20:40:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-01-31 20:40:09,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 20:40:09,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:09,049 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:09,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 20:40:09,049 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:09,050 INFO L85 PathProgramCache]: Analyzing trace with hash 141669294, now seen corresponding path program 17 times [2022-01-31 20:40:09,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:09,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584953258] [2022-01-31 20:40:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:09,108 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:09,138 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:09,139 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:09,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:09,229 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:09,229 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:09,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:09,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:10,242 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:10,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584953258] [2022-01-31 20:40:10,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1584953258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:10,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:10,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 20:40:10,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163478404] [2022-01-31 20:40:10,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:10,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 20:40:10,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:10,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 20:40:10,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 20:40:10,244 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 52 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 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) [2022-01-31 20:40:11,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:11,778 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-01-31 20:40:11,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 20:40:11,778 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 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 [2022-01-31 20:40:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:11,779 INFO L225 Difference]: With dead ends: 79 [2022-01-31 20:40:11,779 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 20:40:11,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=404, Invalid=9298, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:40:11,781 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:11,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 222 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2638 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:40:11,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 20:40:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-01-31 20:40:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-01-31 20:40:11,789 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2022-01-31 20:40:11,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:11,789 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-01-31 20:40:11,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 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) [2022-01-31 20:40:11,789 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-01-31 20:40:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 20:40:11,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:11,790 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:11,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 20:40:11,790 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:11,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:11,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1841504361, now seen corresponding path program 18 times [2022-01-31 20:40:11,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:11,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961935756] [2022-01-31 20:40:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:11,842 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:11,878 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:11,878 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:11,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:11,977 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:11,977 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:11,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:12,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:13,010 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:13,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961935756] [2022-01-31 20:40:13,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1961935756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:13,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:13,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 20:40:13,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157749735] [2022-01-31 20:40:13,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:13,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 20:40:13,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:13,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 20:40:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 20:40:13,013 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 52 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) [2022-01-31 20:40:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:14,427 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-01-31 20:40:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 20:40:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 52 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 [2022-01-31 20:40:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:14,428 INFO L225 Difference]: With dead ends: 82 [2022-01-31 20:40:14,428 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 20:40:14,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3216 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=419, Invalid=10087, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 20:40:14,434 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:14,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 192 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:40:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 20:40:14,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-01-31 20:40:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-01-31 20:40:14,444 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2022-01-31 20:40:14,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:14,445 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-01-31 20:40:14,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 52 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) [2022-01-31 20:40:14,445 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-01-31 20:40:14,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 20:40:14,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:14,446 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:14,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 20:40:14,446 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:14,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:14,446 INFO L85 PathProgramCache]: Analyzing trace with hash -331401778, now seen corresponding path program 19 times [2022-01-31 20:40:14,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:14,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346017236] [2022-01-31 20:40:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:14,501 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:14,545 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:14,545 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:14,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:14,663 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:14,663 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:14,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:14,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:15,739 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:15,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346017236] [2022-01-31 20:40:15,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [346017236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:15,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:15,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 20:40:15,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614645765] [2022-01-31 20:40:15,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:15,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 20:40:15,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:15,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 20:40:15,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3029, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 20:40:15,741 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 54 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) [2022-01-31 20:40:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:17,411 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-01-31 20:40:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 20:40:17,413 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 54 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 [2022-01-31 20:40:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:17,414 INFO L225 Difference]: With dead ends: 85 [2022-01-31 20:40:17,414 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 20:40:17,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=434, Invalid=10908, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 20:40:17,415 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 78 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2896 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:17,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 222 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2896 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:40:17,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 20:40:17,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-01-31 20:40:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-01-31 20:40:17,424 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2022-01-31 20:40:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:17,425 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-01-31 20:40:17,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 54 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) [2022-01-31 20:40:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-01-31 20:40:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 20:40:17,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:17,425 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:17,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 20:40:17,426 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:17,426 INFO L85 PathProgramCache]: Analyzing trace with hash 368896585, now seen corresponding path program 20 times [2022-01-31 20:40:17,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:17,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294303623] [2022-01-31 20:40:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:17,483 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:17,517 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:17,518 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:17,549 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:17,604 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:17,604 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:17,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:17,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:18,731 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:18,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294303623] [2022-01-31 20:40:18,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1294303623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:18,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:18,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 20:40:18,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456703545] [2022-01-31 20:40:18,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:18,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 20:40:18,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 20:40:18,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3254, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:40:18,733 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 56 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) [2022-01-31 20:40:20,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:20,446 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-01-31 20:40:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 20:40:20,446 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 56 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 [2022-01-31 20:40:20,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:20,446 INFO L225 Difference]: With dead ends: 88 [2022-01-31 20:40:20,446 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 20:40:20,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=449, Invalid=11761, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:40:20,448 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 82 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 3093 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 3128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:20,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 227 Invalid, 3128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3093 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:40:20,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 20:40:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-01-31 20:40:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-01-31 20:40:20,457 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-01-31 20:40:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:20,457 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-01-31 20:40:20,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 56 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) [2022-01-31 20:40:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-01-31 20:40:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 20:40:20,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:20,458 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:20,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 20:40:20,458 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:20,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:20,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1993695250, now seen corresponding path program 21 times [2022-01-31 20:40:20,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:20,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722851672] [2022-01-31 20:40:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:20,513 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:20,553 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:20,553 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:20,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:20,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:20,650 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:20,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:20,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:21,881 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:21,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722851672] [2022-01-31 20:40:21,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1722851672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:21,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:21,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 20:40:21,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829787947] [2022-01-31 20:40:21,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:21,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 20:40:21,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:21,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 20:40:21,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3487, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 20:40:21,883 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 58 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) [2022-01-31 20:40:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:23,634 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2022-01-31 20:40:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 20:40:23,635 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 58 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 [2022-01-31 20:40:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:23,635 INFO L225 Difference]: With dead ends: 91 [2022-01-31 20:40:23,635 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 20:40:23,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4151 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=464, Invalid=12646, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 20:40:23,637 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 86 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 3155 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 3191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:23,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 222 Invalid, 3191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3155 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:40:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 20:40:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-01-31 20:40:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-01-31 20:40:23,643 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2022-01-31 20:40:23,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:23,643 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-01-31 20:40:23,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 58 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) [2022-01-31 20:40:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-01-31 20:40:23,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 20:40:23,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:23,644 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:23,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 20:40:23,644 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:23,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:23,645 INFO L85 PathProgramCache]: Analyzing trace with hash -43004887, now seen corresponding path program 22 times [2022-01-31 20:40:23,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:23,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979262744] [2022-01-31 20:40:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:23,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:23,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:23,739 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:23,767 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:23,817 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:23,817 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:23,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:23,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:25,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:25,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979262744] [2022-01-31 20:40:25,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [979262744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:25,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:25,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 20:40:25,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191801865] [2022-01-31 20:40:25,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:25,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 20:40:25,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:25,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 20:40:25,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3728, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 20:40:25,082 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 60 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) [2022-01-31 20:40:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:26,961 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-01-31 20:40:26,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 20:40:26,962 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 60 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 [2022-01-31 20:40:26,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:26,962 INFO L225 Difference]: With dead ends: 94 [2022-01-31 20:40:26,962 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 20:40:26,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4480 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=479, Invalid=13563, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:40:26,964 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 3584 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:26,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 242 Invalid, 3621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:40:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 20:40:26,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-01-31 20:40:26,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-01-31 20:40:26,971 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2022-01-31 20:40:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:26,971 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-01-31 20:40:26,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 60 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) [2022-01-31 20:40:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-01-31 20:40:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 20:40:26,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:26,972 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:26,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 20:40:26,972 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:26,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2066084366, now seen corresponding path program 23 times [2022-01-31 20:40:26,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:26,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109593889] [2022-01-31 20:40:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:27,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:27,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:27,063 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:27,094 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:27,147 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:27,147 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:27,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:27,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:28,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:28,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109593889] [2022-01-31 20:40:28,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109593889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:28,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:28,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 20:40:28,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583124363] [2022-01-31 20:40:28,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:28,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 20:40:28,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:28,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 20:40:28,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3977, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 20:40:28,472 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 64 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 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) [2022-01-31 20:40:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:30,583 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2022-01-31 20:40:30,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 20:40:30,584 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 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 [2022-01-31 20:40:30,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:30,585 INFO L225 Difference]: With dead ends: 97 [2022-01-31 20:40:30,585 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 20:40:30,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4821 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=494, Invalid=14512, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 20:40:30,587 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 4118 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 4156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:30,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 267 Invalid, 4156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4118 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:40:30,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 20:40:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-01-31 20:40:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-01-31 20:40:30,597 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2022-01-31 20:40:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:30,597 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-01-31 20:40:30,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 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) [2022-01-31 20:40:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-01-31 20:40:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 20:40:30,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:30,598 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:30,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 20:40:30,598 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:30,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1427519991, now seen corresponding path program 24 times [2022-01-31 20:40:30,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:30,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421756068] [2022-01-31 20:40:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:30,647 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:30,681 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:30,681 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:30,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:30,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:30,781 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:30,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:30,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:32,139 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:32,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421756068] [2022-01-31 20:40:32,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421756068] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:32,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:32,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 20:40:32,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888431099] [2022-01-31 20:40:32,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:32,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 20:40:32,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:32,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 20:40:32,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=4234, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 20:40:32,141 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 64 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) [2022-01-31 20:40:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:34,229 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-01-31 20:40:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 20:40:34,230 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 64 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 [2022-01-31 20:40:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:34,230 INFO L225 Difference]: With dead ends: 100 [2022-01-31 20:40:34,230 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 20:40:34,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5172 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=509, Invalid=15493, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 20:40:34,233 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 4032 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 4071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:34,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 252 Invalid, 4071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4032 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:40:34,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 20:40:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-01-31 20:40:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-01-31 20:40:34,246 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2022-01-31 20:40:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:34,246 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-01-31 20:40:34,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 64 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) [2022-01-31 20:40:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-01-31 20:40:34,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 20:40:34,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:34,247 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:34,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 20:40:34,247 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:34,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:34,247 INFO L85 PathProgramCache]: Analyzing trace with hash 547564590, now seen corresponding path program 25 times [2022-01-31 20:40:34,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:34,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172349275] [2022-01-31 20:40:34,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:34,304 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:34,334 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:34,334 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:34,372 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:34,433 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:34,433 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:34,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:34,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:35,849 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:35,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172349275] [2022-01-31 20:40:35,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172349275] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:35,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:35,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 20:40:35,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946605934] [2022-01-31 20:40:35,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:35,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 20:40:35,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 20:40:35,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4499, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:40:35,851 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 66 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) [2022-01-31 20:40:37,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:37,960 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-01-31 20:40:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 20:40:37,960 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 66 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 [2022-01-31 20:40:37,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:37,961 INFO L225 Difference]: With dead ends: 103 [2022-01-31 20:40:37,961 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 20:40:37,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5533 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=524, Invalid=16506, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 20:40:37,962 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 101 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 3926 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 3966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:37,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 237 Invalid, 3966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3926 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:40:37,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 20:40:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-01-31 20:40:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-01-31 20:40:37,974 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2022-01-31 20:40:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:37,974 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-01-31 20:40:37,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 66 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) [2022-01-31 20:40:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-01-31 20:40:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 20:40:37,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:37,974 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:37,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 20:40:37,974 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:37,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash -759638039, now seen corresponding path program 26 times [2022-01-31 20:40:37,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:37,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484226951] [2022-01-31 20:40:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:38,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:38,083 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:38,083 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:38,124 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:38,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:38,189 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:38,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:38,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:39,678 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:39,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484226951] [2022-01-31 20:40:39,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [484226951] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:39,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:39,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 20:40:39,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892082188] [2022-01-31 20:40:39,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:39,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 20:40:39,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:39,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 20:40:39,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=4772, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:40:39,680 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 70 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 68 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) [2022-01-31 20:40:41,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:41,971 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-01-31 20:40:41,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 20:40:41,971 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 68 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 [2022-01-31 20:40:41,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:41,972 INFO L225 Difference]: With dead ends: 106 [2022-01-31 20:40:41,972 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 20:40:41,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5906 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=539, Invalid=17551, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 20:40:41,973 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 106 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 4412 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 4453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 4412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:41,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 257 Invalid, 4453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 4412 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:40:41,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 20:40:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-31 20:40:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-01-31 20:40:41,983 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2022-01-31 20:40:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:41,984 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-01-31 20:40:41,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 68 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) [2022-01-31 20:40:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-01-31 20:40:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 20:40:41,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:41,984 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 19, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:41,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 20:40:41,984 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:41,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1164685746, now seen corresponding path program 27 times [2022-01-31 20:40:41,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:41,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226633904] [2022-01-31 20:40:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:42,025 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:42,065 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:42,065 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:42,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:42,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:42,151 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:42,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:42,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:43,734 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:43,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226633904] [2022-01-31 20:40:43,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [226633904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:43,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:43,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 20:40:43,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893129350] [2022-01-31 20:40:43,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:43,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 20:40:43,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:43,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 20:40:43,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=5053, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 20:40:43,736 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 72 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 70 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) [2022-01-31 20:40:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:46,267 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2022-01-31 20:40:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 20:40:46,268 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 70 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 [2022-01-31 20:40:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:46,268 INFO L225 Difference]: With dead ends: 109 [2022-01-31 20:40:46,268 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 20:40:46,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6285 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=554, Invalid=18628, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 20:40:46,270 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 110 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 5016 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 5058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:46,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 282 Invalid, 5058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5016 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:40:46,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 20:40:46,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-01-31 20:40:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-01-31 20:40:46,284 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2022-01-31 20:40:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:46,284 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-01-31 20:40:46,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 70 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) [2022-01-31 20:40:46,285 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-01-31 20:40:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 20:40:46,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:46,285 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 20, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:46,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 20:40:46,285 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 917176777, now seen corresponding path program 28 times [2022-01-31 20:40:46,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:46,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801703083] [2022-01-31 20:40:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:46,337 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:46,378 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:46,379 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:46,419 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:46,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:46,480 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:46,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:46,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:48,130 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:48,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801703083] [2022-01-31 20:40:48,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [801703083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:48,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:48,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 20:40:48,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110123360] [2022-01-31 20:40:48,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:48,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 20:40:48,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:48,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 20:40:48,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=5342, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 20:40:48,131 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 74 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 72 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:50,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:50,849 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-01-31 20:40:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 20:40:50,850 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 72 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 20:40:50,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:50,850 INFO L225 Difference]: With dead ends: 112 [2022-01-31 20:40:50,850 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 20:40:50,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6678 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=569, Invalid=19737, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 20:40:50,853 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 114 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 5460 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 5503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 5460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:50,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 297 Invalid, 5503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 5460 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:40:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 20:40:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-01-31 20:40:50,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:50,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-01-31 20:40:50,862 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-01-31 20:40:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:50,862 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-01-31 20:40:50,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 72 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-01-31 20:40:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 20:40:50,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:50,863 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 21, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:50,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 20:40:50,863 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:50,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1939122066, now seen corresponding path program 29 times [2022-01-31 20:40:50,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:50,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823967419] [2022-01-31 20:40:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:50,923 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:50,965 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:50,965 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:51,004 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:51,065 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:51,065 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:51,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:51,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:52,808 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:52,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823967419] [2022-01-31 20:40:52,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823967419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:52,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:52,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 20:40:52,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279121914] [2022-01-31 20:40:52,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:52,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 20:40:52,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:52,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 20:40:52,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=5639, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 20:40:52,810 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 76 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 74 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:55,495 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-01-31 20:40:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 20:40:55,495 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 74 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 20:40:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:55,496 INFO L225 Difference]: With dead ends: 115 [2022-01-31 20:40:55,496 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 20:40:55,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7077 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=584, Invalid=20878, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 20:40:55,498 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 5251 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 5295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:55,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 277 Invalid, 5295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5251 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:40:55,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 20:40:55,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-01-31 20:40:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:55,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-01-31 20:40:55,512 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2022-01-31 20:40:55,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:55,512 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-01-31 20:40:55,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 74 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:55,513 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-01-31 20:40:55,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 20:40:55,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:55,513 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 22, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:55,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 20:40:55,513 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:55,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2045885527, now seen corresponding path program 30 times [2022-01-31 20:40:55,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:55,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957803668] [2022-01-31 20:40:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:55,566 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:55,605 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:55,605 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:55,644 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:55,689 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:55,689 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:55,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:55,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:57,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957803668] [2022-01-31 20:40:57,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [957803668] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:57,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:57,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 20:40:57,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084964835] [2022-01-31 20:40:57,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:57,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 20:40:57,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:57,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 20:40:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5944, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 20:40:57,520 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 78 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 76 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:00,525 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-01-31 20:41:00,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 20:41:00,526 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 76 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-01-31 20:41:00,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:00,526 INFO L225 Difference]: With dead ends: 118 [2022-01-31 20:41:00,526 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 20:41:00,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7488 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=599, Invalid=22051, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 20:41:00,528 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 122 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 6209 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 6254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 6209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:00,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 317 Invalid, 6254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 6209 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 20:41:00,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 20:41:00,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-01-31 20:41:00,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-01-31 20:41:00,541 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-01-31 20:41:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:00,541 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-01-31 20:41:00,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 76 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-01-31 20:41:00,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 20:41:00,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:00,542 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 23, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:00,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 20:41:00,542 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:00,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:00,542 INFO L85 PathProgramCache]: Analyzing trace with hash -65385842, now seen corresponding path program 31 times [2022-01-31 20:41:00,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:00,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680982879] [2022-01-31 20:41:00,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:00,595 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:00,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:00,634 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:00,663 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:00,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:00,701 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:00,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:00,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:02,641 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:02,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680982879] [2022-01-31 20:41:02,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1680982879] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:02,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:02,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 20:41:02,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821582503] [2022-01-31 20:41:02,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:02,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 20:41:02,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:02,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 20:41:02,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=6257, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 20:41:02,643 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 80 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 78 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:05,787 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-01-31 20:41:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 20:41:05,787 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 78 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 20:41:05,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:05,788 INFO L225 Difference]: With dead ends: 121 [2022-01-31 20:41:05,788 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 20:41:05,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7911 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=614, Invalid=23256, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 20:41:05,790 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 6392 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 6438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:05,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 317 Invalid, 6438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6392 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 20:41:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 20:41:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-01-31 20:41:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-01-31 20:41:05,800 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2022-01-31 20:41:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:05,800 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-01-31 20:41:05,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 78 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-01-31 20:41:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 20:41:05,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:05,801 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 24, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:05,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 20:41:05,801 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:05,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:05,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1034984841, now seen corresponding path program 32 times [2022-01-31 20:41:05,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:05,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970297466] [2022-01-31 20:41:05,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:05,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:05,896 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:05,897 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:05,936 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:05,978 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:05,978 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:05,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:06,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:08,027 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:08,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970297466] [2022-01-31 20:41:08,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1970297466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:08,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:08,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 20:41:08,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129916900] [2022-01-31 20:41:08,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:08,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 20:41:08,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:08,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 20:41:08,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=6578, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 20:41:08,029 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 82 states, 81 states have (on average 1.308641975308642) internal successors, (106), 80 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:11,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:11,309 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-01-31 20:41:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 20:41:11,310 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.308641975308642) internal successors, (106), 80 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 20:41:11,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:11,310 INFO L225 Difference]: With dead ends: 124 [2022-01-31 20:41:11,310 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 20:41:11,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8342 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=629, Invalid=24493, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 20:41:11,312 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 130 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 6790 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 6837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 6790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:11,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 327 Invalid, 6837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 6790 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 20:41:11,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 20:41:11,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-01-31 20:41:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-01-31 20:41:11,325 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2022-01-31 20:41:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:11,325 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-01-31 20:41:11,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 1.308641975308642) internal successors, (106), 80 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-01-31 20:41:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 20:41:11,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:11,326 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 25, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:11,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 20:41:11,326 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:11,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:11,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1307368274, now seen corresponding path program 33 times [2022-01-31 20:41:11,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:11,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113774886] [2022-01-31 20:41:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:11,387 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:11,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:11,438 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:11,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:11,562 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:11,562 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:11,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:11,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:13,673 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:13,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113774886] [2022-01-31 20:41:13,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113774886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:13,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:13,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 20:41:13,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672509304] [2022-01-31 20:41:13,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:13,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 20:41:13,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:13,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 20:41:13,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6907, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 20:41:13,675 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 84 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:17,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:17,052 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-01-31 20:41:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 20:41:17,052 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 20:41:17,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:17,052 INFO L225 Difference]: With dead ends: 127 [2022-01-31 20:41:17,053 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 20:41:17,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8781 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=644, Invalid=25762, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 20:41:17,054 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 133 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 6982 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 7030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 6982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:17,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 327 Invalid, 7030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 6982 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 20:41:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 20:41:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-01-31 20:41:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-01-31 20:41:17,069 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2022-01-31 20:41:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:17,069 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-01-31 20:41:17,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-01-31 20:41:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 20:41:17,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:17,070 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 26, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:17,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 20:41:17,070 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2015359127, now seen corresponding path program 34 times [2022-01-31 20:41:17,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:17,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29805925] [2022-01-31 20:41:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:17,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:17,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:17,151 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:17,190 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:17,249 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:17,249 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:17,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:17,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:19,381 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:19,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29805925] [2022-01-31 20:41:19,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [29805925] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:19,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:19,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 20:41:19,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588758693] [2022-01-31 20:41:19,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:19,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 20:41:19,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:19,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 20:41:19,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=7244, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 20:41:19,383 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 86 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 84 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:23,012 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-01-31 20:41:23,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 20:41:23,012 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 84 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-01-31 20:41:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:23,013 INFO L225 Difference]: With dead ends: 130 [2022-01-31 20:41:23,013 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 20:41:23,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9232 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=659, Invalid=27063, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 20:41:23,014 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 137 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 7397 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 7446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 7397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:23,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 337 Invalid, 7446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 7397 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 20:41:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 20:41:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-01-31 20:41:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-01-31 20:41:23,036 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2022-01-31 20:41:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:23,036 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-01-31 20:41:23,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 84 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-01-31 20:41:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 20:41:23,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:23,037 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 27, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:23,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 20:41:23,037 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:23,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:23,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1186470194, now seen corresponding path program 35 times [2022-01-31 20:41:23,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:23,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900061792] [2022-01-31 20:41:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:23,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:23,116 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:23,116 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:23,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:23,217 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:23,217 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:23,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:23,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:25,613 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:25,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900061792] [2022-01-31 20:41:25,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [900061792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:25,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:25,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 20:41:25,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220219589] [2022-01-31 20:41:25,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:25,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 20:41:25,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:25,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 20:41:25,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=7589, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 20:41:25,615 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 88 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 86 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:29,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:29,607 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2022-01-31 20:41:29,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 20:41:29,608 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 86 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 20:41:29,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:29,609 INFO L225 Difference]: With dead ends: 133 [2022-01-31 20:41:29,609 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 20:41:29,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9693 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=674, Invalid=28396, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 20:41:29,611 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 141 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7936 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 7986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 7936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:29,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 352 Invalid, 7986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 7936 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 20:41:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 20:41:29,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-01-31 20:41:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-01-31 20:41:29,629 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2022-01-31 20:41:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:29,629 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-01-31 20:41:29,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 86 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-01-31 20:41:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 20:41:29,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:29,630 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 28, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:29,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 20:41:29,630 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:29,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:29,630 INFO L85 PathProgramCache]: Analyzing trace with hash 476748105, now seen corresponding path program 36 times [2022-01-31 20:41:29,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:29,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400548915] [2022-01-31 20:41:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:29,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:29,742 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:29,742 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:29,778 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:29,825 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:29,825 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:29,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:29,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:32,313 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:32,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400548915] [2022-01-31 20:41:32,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1400548915] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:32,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:32,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 20:41:32,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246188587] [2022-01-31 20:41:32,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:32,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 20:41:32,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:32,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 20:41:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=7942, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 20:41:32,317 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 90 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 88 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:36,334 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2022-01-31 20:41:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 20:41:36,334 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 88 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 20:41:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:36,335 INFO L225 Difference]: With dead ends: 136 [2022-01-31 20:41:36,335 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 20:41:36,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10166 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=689, Invalid=29761, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 20:41:36,336 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 8265 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 8316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 8265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:36,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 357 Invalid, 8316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 8265 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 20:41:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 20:41:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-01-31 20:41:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-01-31 20:41:36,356 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2022-01-31 20:41:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:36,356 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-01-31 20:41:36,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 88 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-01-31 20:41:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 20:41:36,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:36,357 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 29, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:36,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 20:41:36,357 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:36,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1624600338, now seen corresponding path program 37 times [2022-01-31 20:41:36,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:36,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360313995] [2022-01-31 20:41:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:36,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:36,430 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:36,431 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:36,470 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:36,520 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:36,520 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:36,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:36,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:38,951 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:38,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360313995] [2022-01-31 20:41:38,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1360313995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:38,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:38,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 20:41:38,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668267715] [2022-01-31 20:41:38,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:38,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 20:41:38,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:38,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 20:41:38,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=8303, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:41:38,953 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 92 states, 91 states have (on average 1.3296703296703296) internal successors, (121), 90 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:43,204 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2022-01-31 20:41:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 20:41:43,204 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.3296703296703296) internal successors, (121), 90 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 20:41:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:43,205 INFO L225 Difference]: With dead ends: 139 [2022-01-31 20:41:43,205 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 20:41:43,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10647 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=704, Invalid=31158, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 20:41:43,207 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 149 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 8715 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 8767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 8715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:43,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 367 Invalid, 8767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 8715 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 20:41:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 20:41:43,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-01-31 20:41:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-01-31 20:41:43,228 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 125 [2022-01-31 20:41:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:43,228 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-01-31 20:41:43,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 1.3296703296703296) internal successors, (121), 90 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-01-31 20:41:43,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 20:41:43,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:43,229 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 30, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:43,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 20:41:43,229 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:43,230 INFO L85 PathProgramCache]: Analyzing trace with hash 547240745, now seen corresponding path program 38 times [2022-01-31 20:41:43,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:43,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160681107] [2022-01-31 20:41:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:43,282 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:43,313 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:43,313 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:43,341 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:43,382 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:43,382 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:43,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:43,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:45,919 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:45,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160681107] [2022-01-31 20:41:45,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1160681107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:45,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:45,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 20:41:45,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952613843] [2022-01-31 20:41:45,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:45,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 20:41:45,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:45,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 20:41:45,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=8672, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 20:41:45,921 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 94 states, 93 states have (on average 1.3333333333333333) internal successors, (124), 92 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:50,223 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-01-31 20:41:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 20:41:50,223 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 1.3333333333333333) internal successors, (124), 92 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-01-31 20:41:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:50,224 INFO L225 Difference]: With dead ends: 142 [2022-01-31 20:41:50,224 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 20:41:50,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11136 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=719, Invalid=32587, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 20:41:50,225 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 153 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 9055 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 9108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 9055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:50,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 372 Invalid, 9108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 9055 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 20:41:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 20:41:50,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-01-31 20:41:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-01-31 20:41:50,246 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2022-01-31 20:41:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:50,247 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-01-31 20:41:50,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 1.3333333333333333) internal successors, (124), 92 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-01-31 20:41:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 20:41:50,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:50,248 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 31, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:50,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 20:41:50,248 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:50,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:50,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1817369842, now seen corresponding path program 39 times [2022-01-31 20:41:50,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:50,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390924523] [2022-01-31 20:41:50,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:50,305 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:50,344 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:50,345 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:50,395 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:50,442 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:50,442 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:50,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:50,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:53,146 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:53,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390924523] [2022-01-31 20:41:53,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1390924523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:53,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:53,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 20:41:53,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290235534] [2022-01-31 20:41:53,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:53,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 20:41:53,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:53,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 20:41:53,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=9049, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 20:41:53,148 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 96 states, 95 states have (on average 1.3368421052631578) internal successors, (127), 94 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:57,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:57,734 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2022-01-31 20:41:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 20:41:57,734 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.3368421052631578) internal successors, (127), 94 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 20:41:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:57,739 INFO L225 Difference]: With dead ends: 145 [2022-01-31 20:41:57,739 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 20:41:57,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11639 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=734, Invalid=34048, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 20:41:57,743 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 157 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 9779 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 9833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 9779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:57,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 392 Invalid, 9833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 9779 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 20:41:57,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 20:41:57,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-01-31 20:41:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:57,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-01-31 20:41:57,767 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2022-01-31 20:41:57,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:57,767 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-01-31 20:41:57,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.3368421052631578) internal successors, (127), 94 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-01-31 20:41:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 20:41:57,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:57,768 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 32, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:57,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 20:41:57,768 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:57,768 INFO L85 PathProgramCache]: Analyzing trace with hash 122221833, now seen corresponding path program 40 times [2022-01-31 20:41:57,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:57,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867589858] [2022-01-31 20:41:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:57,812 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:57,841 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:57,841 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:57,880 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:57,932 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:41:57,932 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:41:57,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:57,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:00,780 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:00,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867589858] [2022-01-31 20:42:00,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [867589858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:00,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:00,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 20:42:00,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844285082] [2022-01-31 20:42:00,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:00,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 20:42:00,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:00,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 20:42:00,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=9434, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:42:00,782 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 98 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:05,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:05,395 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-01-31 20:42:05,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 20:42:05,395 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-01-31 20:42:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:05,396 INFO L225 Difference]: With dead ends: 148 [2022-01-31 20:42:05,396 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 20:42:05,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12148 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=749, Invalid=35541, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 20:42:05,398 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 161 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 9752 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 9807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 9752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:05,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 382 Invalid, 9807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 9752 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 20:42:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 20:42:05,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-01-31 20:42:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-01-31 20:42:05,420 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2022-01-31 20:42:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:05,421 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-01-31 20:42:05,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-01-31 20:42:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 20:42:05,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:05,422 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 33, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:05,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 20:42:05,422 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:05,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1992188626, now seen corresponding path program 41 times [2022-01-31 20:42:05,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:05,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545631378] [2022-01-31 20:42:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:05,471 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:05,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:05,517 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:05,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:05,603 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:05,603 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:05,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:05,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:08,465 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:08,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545631378] [2022-01-31 20:42:08,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1545631378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:08,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:08,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 20:42:08,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277988844] [2022-01-31 20:42:08,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:08,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 20:42:08,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:08,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 20:42:08,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=9827, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 20:42:08,467 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 100 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 98 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:13,539 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2022-01-31 20:42:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 20:42:13,540 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 98 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-01-31 20:42:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:13,541 INFO L225 Difference]: With dead ends: 151 [2022-01-31 20:42:13,541 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 20:42:13,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12669 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=764, Invalid=37066, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 20:42:13,544 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 166 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 10509 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 10565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 10509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:13,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 402 Invalid, 10565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 10509 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 20:42:13,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 20:42:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-01-31 20:42:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-01-31 20:42:13,563 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2022-01-31 20:42:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:13,563 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-01-31 20:42:13,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 98 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-01-31 20:42:13,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 20:42:13,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:13,564 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 34, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:13,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 20:42:13,565 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:13,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1891157737, now seen corresponding path program 42 times [2022-01-31 20:42:13,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:13,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490597418] [2022-01-31 20:42:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:13,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:13,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:13,676 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:13,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:13,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:13,771 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:13,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:13,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:16,720 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:16,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490597418] [2022-01-31 20:42:16,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [490597418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:16,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:16,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 20:42:16,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797637172] [2022-01-31 20:42:16,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:16,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 20:42:16,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:16,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 20:42:16,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=10228, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 20:42:16,723 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 102 states, 101 states have (on average 1.3465346534653466) internal successors, (136), 100 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:21,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:21,575 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2022-01-31 20:42:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 20:42:21,576 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 1.3465346534653466) internal successors, (136), 100 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-01-31 20:42:21,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:21,576 INFO L225 Difference]: With dead ends: 154 [2022-01-31 20:42:21,577 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 20:42:21,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13200 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=779, Invalid=38623, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 20:42:21,580 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 170 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 9935 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 9992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 9935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:21,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 372 Invalid, 9992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 9935 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 20:42:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 20:42:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-01-31 20:42:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-01-31 20:42:21,603 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2022-01-31 20:42:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:21,603 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-01-31 20:42:21,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 1.3465346534653466) internal successors, (136), 100 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-01-31 20:42:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 20:42:21,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:21,604 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 35, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:21,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 20:42:21,604 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:21,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1423572814, now seen corresponding path program 43 times [2022-01-31 20:42:21,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:21,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604238397] [2022-01-31 20:42:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:21,668 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:21,700 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:21,700 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:21,729 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:21,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:21,771 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:21,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:21,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:24,827 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:24,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604238397] [2022-01-31 20:42:24,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [604238397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:24,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:24,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 20:42:24,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956739187] [2022-01-31 20:42:24,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:24,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 20:42:24,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:24,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 20:42:24,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=10637, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 20:42:24,830 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 104 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 102 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:29,957 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2022-01-31 20:42:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 20:42:29,958 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 102 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 20:42:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:29,958 INFO L225 Difference]: With dead ends: 157 [2022-01-31 20:42:29,958 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 20:42:29,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13741 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=794, Invalid=40212, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 20:42:29,961 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 173 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 10568 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 10626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 10568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:29,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 387 Invalid, 10626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 10568 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 20:42:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 20:42:29,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-01-31 20:42:29,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:29,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-01-31 20:42:29,986 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2022-01-31 20:42:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:29,987 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-01-31 20:42:29,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 102 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:29,987 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-01-31 20:42:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 20:42:29,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:29,988 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 36, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:29,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 20:42:29,988 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:29,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:29,988 INFO L85 PathProgramCache]: Analyzing trace with hash 180072649, now seen corresponding path program 44 times [2022-01-31 20:42:29,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:29,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775333223] [2022-01-31 20:42:29,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:30,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:30,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:30,073 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:30,114 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:30,156 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:30,156 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:30,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:30,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:33,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:33,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775333223] [2022-01-31 20:42:33,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1775333223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:33,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:33,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 20:42:33,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318333957] [2022-01-31 20:42:33,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:33,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 20:42:33,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:33,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 20:42:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=11054, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 20:42:33,304 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 106 states, 105 states have (on average 1.3523809523809525) internal successors, (142), 104 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:38,823 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-01-31 20:42:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 20:42:38,824 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.3523809523809525) internal successors, (142), 104 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-01-31 20:42:38,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:38,824 INFO L225 Difference]: With dead ends: 160 [2022-01-31 20:42:38,824 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 20:42:38,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14292 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=809, Invalid=41833, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 20:42:38,827 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 178 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 12068 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 12127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 12068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:38,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 432 Invalid, 12127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 12068 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 20:42:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 20:42:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-01-31 20:42:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2022-01-31 20:42:38,846 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2022-01-31 20:42:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:38,846 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2022-01-31 20:42:38,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.3523809523809525) internal successors, (142), 104 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2022-01-31 20:42:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 20:42:38,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:38,847 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 37, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:38,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 20:42:38,847 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:38,847 INFO L85 PathProgramCache]: Analyzing trace with hash -840414866, now seen corresponding path program 45 times [2022-01-31 20:42:38,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:38,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402977776] [2022-01-31 20:42:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:38,889 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:38,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:38,927 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:38,965 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:39,016 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:39,016 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:39,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:39,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:42,288 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:42,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402977776] [2022-01-31 20:42:42,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1402977776] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:42,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:42,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 20:42:42,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955284119] [2022-01-31 20:42:42,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:42,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 20:42:42,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 20:42:42,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=11479, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 20:42:42,291 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 108 states, 107 states have (on average 1.355140186915888) internal successors, (145), 106 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:47,911 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2022-01-31 20:42:47,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 20:42:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 1.355140186915888) internal successors, (145), 106 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-01-31 20:42:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:47,912 INFO L225 Difference]: With dead ends: 163 [2022-01-31 20:42:47,912 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 20:42:47,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14853 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=824, Invalid=43486, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 20:42:47,914 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 181 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 11746 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 11806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 11746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:47,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 412 Invalid, 11806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 11746 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 20:42:47,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 20:42:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-01-31 20:42:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-01-31 20:42:47,932 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 149 [2022-01-31 20:42:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:47,932 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-01-31 20:42:47,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 1.355140186915888) internal successors, (145), 106 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-01-31 20:42:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 20:42:47,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:47,933 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 38, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:47,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 20:42:47,933 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1889514153, now seen corresponding path program 46 times [2022-01-31 20:42:47,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:47,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992859372] [2022-01-31 20:42:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:47,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:48,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:48,002 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:48,033 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:48,084 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:48,085 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:48,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:48,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:51,493 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:51,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992859372] [2022-01-31 20:42:51,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [992859372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:51,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:51,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 20:42:51,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858793301] [2022-01-31 20:42:51,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:51,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 20:42:51,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:51,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 20:42:51,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=11912, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:42:51,494 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 110 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 108 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:57,327 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-01-31 20:42:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 20:42:57,328 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 108 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-01-31 20:42:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:57,328 INFO L225 Difference]: With dead ends: 166 [2022-01-31 20:42:57,329 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 20:42:57,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15424 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=839, Invalid=45171, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 20:42:57,332 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 186 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 12726 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 12787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 12726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:57,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 437 Invalid, 12787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 12726 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-31 20:42:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 20:42:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-01-31 20:42:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-01-31 20:42:57,360 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2022-01-31 20:42:57,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:57,361 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-01-31 20:42:57,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 108 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:57,361 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-01-31 20:42:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 20:42:57,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:57,362 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 39, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:57,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 20:42:57,362 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:57,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:57,362 INFO L85 PathProgramCache]: Analyzing trace with hash -295797874, now seen corresponding path program 47 times [2022-01-31 20:42:57,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:57,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842328023] [2022-01-31 20:42:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:57,413 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:57,441 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:57,441 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:57,479 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:57,529 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:42:57,529 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:42:57,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:57,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:00,984 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:00,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842328023] [2022-01-31 20:43:00,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1842328023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:00,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:00,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 20:43:00,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384697200] [2022-01-31 20:43:00,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:00,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 20:43:00,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 20:43:00,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=12353, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:43:00,986 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 112 states, 111 states have (on average 1.3603603603603605) internal successors, (151), 110 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:06,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:06,949 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2022-01-31 20:43:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 20:43:06,949 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 111 states have (on average 1.3603603603603605) internal successors, (151), 110 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 20:43:06,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:06,950 INFO L225 Difference]: With dead ends: 169 [2022-01-31 20:43:06,950 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 20:43:06,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16005 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=854, Invalid=46888, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 20:43:06,952 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 189 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 12384 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 12446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 12384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:06,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 417 Invalid, 12446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 12384 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 20:43:06,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 20:43:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-01-31 20:43:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2022-01-31 20:43:06,981 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 155 [2022-01-31 20:43:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:06,981 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2022-01-31 20:43:06,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 111 states have (on average 1.3603603603603605) internal successors, (151), 110 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:06,981 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2022-01-31 20:43:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 20:43:06,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:06,982 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 40, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:06,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 20:43:06,982 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:06,982 INFO L85 PathProgramCache]: Analyzing trace with hash 187878537, now seen corresponding path program 48 times [2022-01-31 20:43:06,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:06,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558274500] [2022-01-31 20:43:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:07,036 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:07,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:07,079 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:43:07,119 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:07,171 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:07,171 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:43:07,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:07,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:10,853 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:10,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558274500] [2022-01-31 20:43:10,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558274500] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:10,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:10,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 20:43:10,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698396929] [2022-01-31 20:43:10,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:10,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 20:43:10,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 20:43:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=12802, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 20:43:10,855 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 114 states, 113 states have (on average 1.3628318584070795) internal successors, (154), 112 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:17,089 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-01-31 20:43:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 20:43:17,089 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 1.3628318584070795) internal successors, (154), 112 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-01-31 20:43:17,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:17,090 INFO L225 Difference]: With dead ends: 172 [2022-01-31 20:43:17,090 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 20:43:17,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16596 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=869, Invalid=48637, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 20:43:17,092 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 193 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 12936 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 12999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 12936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:17,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 427 Invalid, 12999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 12936 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-31 20:43:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 20:43:17,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-01-31 20:43:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2022-01-31 20:43:17,112 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2022-01-31 20:43:17,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:17,113 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2022-01-31 20:43:17,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 1.3628318584070795) internal successors, (154), 112 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2022-01-31 20:43:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 20:43:17,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:17,114 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 41, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:17,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 20:43:17,114 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:17,114 INFO L85 PathProgramCache]: Analyzing trace with hash -223439442, now seen corresponding path program 49 times [2022-01-31 20:43:17,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:17,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418975854] [2022-01-31 20:43:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:17,156 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:17,195 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:17,195 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:43:17,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:17,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:17,287 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:43:17,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:17,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:21,177 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:21,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418975854] [2022-01-31 20:43:21,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [418975854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:21,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:21,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 20:43:21,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163343356] [2022-01-31 20:43:21,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:21,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 20:43:21,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:21,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 20:43:21,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=13259, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 20:43:21,180 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 116 states, 115 states have (on average 1.3652173913043477) internal successors, (157), 114 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:27,668 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2022-01-31 20:43:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 20:43:27,668 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.3652173913043477) internal successors, (157), 114 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-01-31 20:43:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:27,669 INFO L225 Difference]: With dead ends: 175 [2022-01-31 20:43:27,669 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 20:43:27,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17197 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=884, Invalid=50418, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 20:43:27,672 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 198 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 13817 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 13881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 13817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:27,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 447 Invalid, 13881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 13817 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-31 20:43:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 20:43:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-01-31 20:43:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-01-31 20:43:27,693 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 161 [2022-01-31 20:43:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:27,693 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-01-31 20:43:27,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.3652173913043477) internal successors, (157), 114 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-01-31 20:43:27,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 20:43:27,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:27,694 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 42, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:27,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 20:43:27,694 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:27,694 INFO L85 PathProgramCache]: Analyzing trace with hash -255656343, now seen corresponding path program 50 times [2022-01-31 20:43:27,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:27,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040219526] [2022-01-31 20:43:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:27,748 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:27,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:27,796 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:43:27,830 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:27,885 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:27,885 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:43:27,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:27,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:31,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:31,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040219526] [2022-01-31 20:43:31,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1040219526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:31,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:31,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 20:43:31,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481307300] [2022-01-31 20:43:31,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:31,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 20:43:31,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:31,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 20:43:31,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=13724, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:43:31,860 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 118 states, 117 states have (on average 1.3675213675213675) internal successors, (160), 116 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:38,379 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2022-01-31 20:43:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 20:43:38,379 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 117 states have (on average 1.3675213675213675) internal successors, (160), 116 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-01-31 20:43:38,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:38,380 INFO L225 Difference]: With dead ends: 178 [2022-01-31 20:43:38,380 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 20:43:38,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17808 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=899, Invalid=52231, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 20:43:38,382 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 202 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 13601 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 13666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 13601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:38,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 432 Invalid, 13666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 13601 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-31 20:43:38,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 20:43:38,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-01-31 20:43:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-01-31 20:43:38,415 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2022-01-31 20:43:38,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:38,415 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-01-31 20:43:38,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 117 states have (on average 1.3675213675213675) internal successors, (160), 116 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-01-31 20:43:38,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 20:43:38,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:38,416 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 43, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:38,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 20:43:38,416 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:38,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:38,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2043320270, now seen corresponding path program 51 times [2022-01-31 20:43:38,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:38,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470825405] [2022-01-31 20:43:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:38,476 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:38,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:38,513 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:43:38,548 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:38,609 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:38,609 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:43:38,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:38,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:42,654 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:42,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470825405] [2022-01-31 20:43:42,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [470825405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:42,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:42,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 20:43:42,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568578460] [2022-01-31 20:43:42,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:42,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 20:43:42,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:42,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 20:43:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=14197, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 20:43:42,658 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 120 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 118 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:49,434 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2022-01-31 20:43:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 20:43:49,434 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 118 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 20:43:49,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:49,435 INFO L225 Difference]: With dead ends: 181 [2022-01-31 20:43:49,435 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 20:43:49,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18431 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=914, Invalid=54076, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 20:43:49,437 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 206 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 14507 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 14573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 14507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:49,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 452 Invalid, 14573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 14507 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-31 20:43:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 20:43:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-01-31 20:43:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2022-01-31 20:43:49,459 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2022-01-31 20:43:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:49,460 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2022-01-31 20:43:49,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 118 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2022-01-31 20:43:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 20:43:49,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:49,460 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 44, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:49,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 20:43:49,460 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:49,461 INFO L85 PathProgramCache]: Analyzing trace with hash -987871159, now seen corresponding path program 52 times [2022-01-31 20:43:49,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:49,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112658597] [2022-01-31 20:43:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:49,517 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:49,547 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:49,547 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:43:49,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:49,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:43:49,628 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:43:49,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:49,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:53,913 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:53,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112658597] [2022-01-31 20:43:53,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [112658597] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:53,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:53,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 20:43:53,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092726464] [2022-01-31 20:43:53,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:53,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 20:43:53,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:53,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 20:43:53,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=14678, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 20:43:53,916 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 122 states, 121 states have (on average 1.371900826446281) internal successors, (166), 120 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:01,211 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2022-01-31 20:44:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 20:44:01,212 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 1.371900826446281) internal successors, (166), 120 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-01-31 20:44:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:01,212 INFO L225 Difference]: With dead ends: 184 [2022-01-31 20:44:01,212 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 20:44:01,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19060 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=929, Invalid=55953, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 20:44:01,215 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 210 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 15601 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 15668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 15601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:01,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 477 Invalid, 15668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 15601 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-31 20:44:01,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 20:44:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-01-31 20:44:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-01-31 20:44:01,239 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170 [2022-01-31 20:44:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:01,239 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-01-31 20:44:01,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 1.371900826446281) internal successors, (166), 120 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-01-31 20:44:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 20:44:01,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:01,240 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 45, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:01,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 20:44:01,241 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:01,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1524334098, now seen corresponding path program 53 times [2022-01-31 20:44:01,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:01,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449132009] [2022-01-31 20:44:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:01,305 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:01,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:01,354 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:44:01,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:01,464 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:01,464 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:44:01,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:01,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:05,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:05,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449132009] [2022-01-31 20:44:05,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [449132009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:05,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:05,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 20:44:05,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750047473] [2022-01-31 20:44:05,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:05,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 20:44:05,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:05,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 20:44:05,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=15167, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 20:44:05,753 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 124 states, 123 states have (on average 1.3739837398373984) internal successors, (169), 122 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:13,291 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2022-01-31 20:44:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 20:44:13,291 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 1.3739837398373984) internal successors, (169), 122 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-01-31 20:44:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:13,292 INFO L225 Difference]: With dead ends: 187 [2022-01-31 20:44:13,292 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 20:44:13,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19701 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=944, Invalid=57862, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 20:44:13,295 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 214 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 16220 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 16288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 16220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:13,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 487 Invalid, 16288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 16220 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-31 20:44:13,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 20:44:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-01-31 20:44:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2022-01-31 20:44:13,321 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 173 [2022-01-31 20:44:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:13,321 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2022-01-31 20:44:13,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 1.3739837398373984) internal successors, (169), 122 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2022-01-31 20:44:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 20:44:13,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:13,322 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 46, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:13,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 20:44:13,322 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:13,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1718441431, now seen corresponding path program 54 times [2022-01-31 20:44:13,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:13,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154625981] [2022-01-31 20:44:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:13,379 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:13,409 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:13,409 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:44:13,442 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:13,502 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:13,502 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:44:13,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:13,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:17,938 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:17,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154625981] [2022-01-31 20:44:17,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [154625981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:17,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:17,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 20:44:17,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381489411] [2022-01-31 20:44:17,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:17,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 20:44:17,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:17,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 20:44:17,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=15664, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 20:44:17,940 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 126 states, 125 states have (on average 1.376) internal successors, (172), 124 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:25,306 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2022-01-31 20:44:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 20:44:25,307 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.376) internal successors, (172), 124 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-01-31 20:44:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:25,307 INFO L225 Difference]: With dead ends: 190 [2022-01-31 20:44:25,307 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 20:44:25,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20352 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=959, Invalid=59803, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 20:44:25,310 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 218 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 15139 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 15208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 15139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:25,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 447 Invalid, 15208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 15139 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-01-31 20:44:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 20:44:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-01-31 20:44:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-01-31 20:44:25,333 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 176 [2022-01-31 20:44:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:25,333 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-01-31 20:44:25,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.376) internal successors, (172), 124 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-01-31 20:44:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 20:44:25,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:25,335 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 47, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:25,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 20:44:25,335 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:25,335 INFO L85 PathProgramCache]: Analyzing trace with hash 950948878, now seen corresponding path program 55 times [2022-01-31 20:44:25,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:25,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232321468] [2022-01-31 20:44:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:25,413 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:25,460 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:25,460 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:44:25,499 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:25,549 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:25,549 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:44:25,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:25,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:30,064 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:30,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232321468] [2022-01-31 20:44:30,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [232321468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:30,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:30,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 20:44:30,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124035942] [2022-01-31 20:44:30,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:30,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 20:44:30,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:30,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 20:44:30,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=16169, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 20:44:30,067 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 128 states, 127 states have (on average 1.3779527559055118) internal successors, (175), 126 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:38,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:38,115 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2022-01-31 20:44:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 20:44:38,116 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 1.3779527559055118) internal successors, (175), 126 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 20:44:38,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:38,116 INFO L225 Difference]: With dead ends: 193 [2022-01-31 20:44:38,117 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 20:44:38,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21013 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=974, Invalid=61776, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 20:44:38,120 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 221 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 17496 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 17566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 17496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:38,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 507 Invalid, 17566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 17496 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-01-31 20:44:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 20:44:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-01-31 20:44:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-01-31 20:44:38,158 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2022-01-31 20:44:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:38,158 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-01-31 20:44:38,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 1.3779527559055118) internal successors, (175), 126 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-01-31 20:44:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 20:44:38,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:38,159 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 48, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:38,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 20:44:38,159 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:38,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:38,160 INFO L85 PathProgramCache]: Analyzing trace with hash -856808439, now seen corresponding path program 56 times [2022-01-31 20:44:38,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:38,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986275549] [2022-01-31 20:44:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:38,227 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:38,276 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:38,276 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:44:38,309 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:38,349 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:38,349 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:44:38,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:38,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:43,044 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:43,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986275549] [2022-01-31 20:44:43,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [986275549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:43,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:43,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 20:44:43,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856392374] [2022-01-31 20:44:43,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:43,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 20:44:43,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:43,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 20:44:43,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=16682, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 20:44:43,046 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 130 states, 129 states have (on average 1.37984496124031) internal successors, (178), 128 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:51,135 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2022-01-31 20:44:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 20:44:51,139 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 129 states have (on average 1.37984496124031) internal successors, (178), 128 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-01-31 20:44:51,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:51,140 INFO L225 Difference]: With dead ends: 196 [2022-01-31 20:44:51,140 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 20:44:51,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21686 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=989, Invalid=63781, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 20:44:51,143 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 226 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 17438 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 17509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 17438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:51,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 497 Invalid, 17509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 17438 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-01-31 20:44:51,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 20:44:51,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-01-31 20:44:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-01-31 20:44:51,183 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 182 [2022-01-31 20:44:51,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:51,183 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-01-31 20:44:51,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 129 states have (on average 1.37984496124031) internal successors, (178), 128 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-01-31 20:44:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 20:44:51,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:51,185 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 49, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:51,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 20:44:51,185 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:51,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1160114642, now seen corresponding path program 57 times [2022-01-31 20:44:51,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:51,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979481247] [2022-01-31 20:44:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:51,226 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:51,273 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:51,273 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:44:51,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:51,352 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:44:51,353 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:44:51,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:51,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:56,218 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:56,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979481247] [2022-01-31 20:44:56,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [979481247] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:56,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:56,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 20:44:56,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275270923] [2022-01-31 20:44:56,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:56,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 20:44:56,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:56,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 20:44:56,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=17203, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 20:44:56,220 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 132 states, 131 states have (on average 1.381679389312977) internal successors, (181), 130 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:04,186 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2022-01-31 20:45:04,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 20:45:04,186 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 131 states have (on average 1.381679389312977) internal successors, (181), 130 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-01-31 20:45:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:04,187 INFO L225 Difference]: With dead ends: 199 [2022-01-31 20:45:04,187 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 20:45:04,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22365 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1004, Invalid=65818, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 20:45:04,189 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 229 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 16476 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 16548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 16476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:04,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 462 Invalid, 16548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 16476 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-31 20:45:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 20:45:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-01-31 20:45:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 185 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2022-01-31 20:45:04,219 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2022-01-31 20:45:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:04,220 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2022-01-31 20:45:04,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 131 states have (on average 1.381679389312977) internal successors, (181), 130 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2022-01-31 20:45:04,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 20:45:04,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:04,221 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 50, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:04,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 20:45:04,221 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:04,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash -344017431, now seen corresponding path program 58 times [2022-01-31 20:45:04,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:04,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923382196] [2022-01-31 20:45:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:04,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:04,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:04,301 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:45:04,339 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:04,398 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:04,398 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:45:04,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:04,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:09,330 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:09,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923382196] [2022-01-31 20:45:09,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [923382196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:09,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:09,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 20:45:09,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425389947] [2022-01-31 20:45:09,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:09,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 20:45:09,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:09,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 20:45:09,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=17732, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 20:45:09,332 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 134 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 132 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:17,818 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2022-01-31 20:45:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 20:45:17,819 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 132 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-01-31 20:45:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:17,819 INFO L225 Difference]: With dead ends: 202 [2022-01-31 20:45:17,820 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 20:45:17,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23056 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1019, Invalid=67887, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 20:45:17,822 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 234 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 18214 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 18287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 18214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:17,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 502 Invalid, 18287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 18214 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-01-31 20:45:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 20:45:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-01-31 20:45:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-01-31 20:45:17,863 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 188 [2022-01-31 20:45:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:17,863 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-01-31 20:45:17,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 132 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-01-31 20:45:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 20:45:17,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:17,865 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 51, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:17,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 20:45:17,865 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:17,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1801867186, now seen corresponding path program 59 times [2022-01-31 20:45:17,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:17,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736228521] [2022-01-31 20:45:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:17,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:17,949 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:17,949 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:45:17,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:18,017 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:18,017 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:45:18,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:18,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:23,140 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:23,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736228521] [2022-01-31 20:45:23,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736228521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:23,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:23,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 20:45:23,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407140744] [2022-01-31 20:45:23,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:23,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 20:45:23,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:23,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 20:45:23,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=18269, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 20:45:23,144 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 136 states, 135 states have (on average 1.385185185185185) internal successors, (187), 134 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:31,927 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2022-01-31 20:45:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 20:45:31,927 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 135 states have (on average 1.385185185185185) internal successors, (187), 134 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 20:45:31,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:31,928 INFO L225 Difference]: With dead ends: 205 [2022-01-31 20:45:31,928 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 20:45:31,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23757 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1034, Invalid=69988, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 20:45:31,932 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 237 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 18324 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 18398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 18324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:31,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 497 Invalid, 18398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 18324 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-01-31 20:45:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 20:45:31,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-01-31 20:45:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2022-01-31 20:45:31,967 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 191 [2022-01-31 20:45:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:31,967 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2022-01-31 20:45:31,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 135 states have (on average 1.385185185185185) internal successors, (187), 134 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2022-01-31 20:45:31,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 20:45:31,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:31,968 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 52, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:31,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 20:45:31,968 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:31,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:31,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1894621239, now seen corresponding path program 60 times [2022-01-31 20:45:31,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:31,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774565783] [2022-01-31 20:45:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:32,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:32,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:32,064 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:45:32,093 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:32,154 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:32,154 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:45:32,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:32,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:37,584 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:37,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774565783] [2022-01-31 20:45:37,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1774565783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:37,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:37,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 20:45:37,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715058065] [2022-01-31 20:45:37,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:37,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 20:45:37,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:37,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 20:45:37,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=18814, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 20:45:37,586 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 138 states, 137 states have (on average 1.3868613138686132) internal successors, (190), 136 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:46,974 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2022-01-31 20:45:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 20:45:46,975 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 137 states have (on average 1.3868613138686132) internal successors, (190), 136 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-01-31 20:45:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:46,976 INFO L225 Difference]: With dead ends: 208 [2022-01-31 20:45:46,976 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 20:45:46,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24470 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1049, Invalid=72121, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 20:45:46,978 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 241 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 20319 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 20394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 20319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:46,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 542 Invalid, 20394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 20319 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-01-31 20:45:46,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 20:45:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2022-01-31 20:45:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2022-01-31 20:45:47,023 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 194 [2022-01-31 20:45:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:47,024 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2022-01-31 20:45:47,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 137 states have (on average 1.3868613138686132) internal successors, (190), 136 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2022-01-31 20:45:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 20:45:47,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:47,025 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 53, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:47,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 20:45:47,025 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:47,026 INFO L85 PathProgramCache]: Analyzing trace with hash 828324462, now seen corresponding path program 61 times [2022-01-31 20:45:47,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:47,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247466252] [2022-01-31 20:45:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:47,069 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:47,108 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:47,108 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:45:47,164 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:47,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:45:47,204 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:45:47,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:47,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:52,747 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:52,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247466252] [2022-01-31 20:45:52,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [247466252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:52,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:52,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 20:45:52,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929800490] [2022-01-31 20:45:52,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:52,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 20:45:52,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:52,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 20:45:52,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=19367, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 20:45:52,751 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 140 states, 139 states have (on average 1.3884892086330936) internal successors, (193), 138 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:02,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:02,472 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2022-01-31 20:46:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 20:46:02,472 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 139 states have (on average 1.3884892086330936) internal successors, (193), 138 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-01-31 20:46:02,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:02,473 INFO L225 Difference]: With dead ends: 211 [2022-01-31 20:46:02,473 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 20:46:02,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25191 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1064, Invalid=74286, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 20:46:02,476 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 246 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 21029 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 21105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 21029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:02,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 552 Invalid, 21105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 21029 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-01-31 20:46:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 20:46:02,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-01-31 20:46:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2022-01-31 20:46:02,511 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 197 [2022-01-31 20:46:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:46:02,512 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2022-01-31 20:46:02,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 139 states have (on average 1.3884892086330936) internal successors, (193), 138 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2022-01-31 20:46:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 20:46:02,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:46:02,513 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 54, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:46:02,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 20:46:02,513 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:46:02,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:46:02,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1056383401, now seen corresponding path program 62 times [2022-01-31 20:46:02,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:46:02,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136092320] [2022-01-31 20:46:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:46:02,572 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:02,611 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:02,611 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:46:02,661 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:02,712 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:02,712 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:46:02,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:46:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:02,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:46:08,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:08,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136092320] [2022-01-31 20:46:08,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136092320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:08,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:08,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 20:46:08,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816399082] [2022-01-31 20:46:08,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:08,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 20:46:08,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:08,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 20:46:08,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=19928, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 20:46:08,284 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 142 states, 141 states have (on average 1.3900709219858156) internal successors, (196), 140 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:18,182 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2022-01-31 20:46:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 20:46:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 141 states have (on average 1.3900709219858156) internal successors, (196), 140 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-01-31 20:46:18,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:18,183 INFO L225 Difference]: With dead ends: 214 [2022-01-31 20:46:18,183 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 20:46:18,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25920 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1079, Invalid=76483, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 20:46:18,186 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 250 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 21159 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 21236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 21159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:18,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 547 Invalid, 21236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 21159 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-01-31 20:46:18,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 20:46:18,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-01-31 20:46:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-01-31 20:46:18,218 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 200 [2022-01-31 20:46:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:46:18,219 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-01-31 20:46:18,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 141 states have (on average 1.3900709219858156) internal successors, (196), 140 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-01-31 20:46:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 20:46:18,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:46:18,220 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 55, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:46:18,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 20:46:18,220 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:46:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:46:18,220 INFO L85 PathProgramCache]: Analyzing trace with hash 521972878, now seen corresponding path program 63 times [2022-01-31 20:46:18,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:46:18,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103911085] [2022-01-31 20:46:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:46:18,283 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:18,330 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:18,331 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:46:18,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:18,430 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:18,430 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:46:18,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:46:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:18,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:46:24,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:24,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103911085] [2022-01-31 20:46:24,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [103911085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:24,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:24,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 20:46:24,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241721830] [2022-01-31 20:46:24,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:24,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 20:46:24,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 20:46:24,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=20497, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 20:46:24,258 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 144 states, 143 states have (on average 1.3916083916083917) internal successors, (199), 142 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:34,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:34,692 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2022-01-31 20:46:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 20:46:34,692 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 143 states have (on average 1.3916083916083917) internal successors, (199), 142 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 20:46:34,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:34,693 INFO L225 Difference]: With dead ends: 217 [2022-01-31 20:46:34,693 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 20:46:34,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26661 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1094, Invalid=78712, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 20:46:34,712 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 254 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 22674 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 22752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 22674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:34,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 577 Invalid, 22752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 22674 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-01-31 20:46:34,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 20:46:34,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-01-31 20:46:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2022-01-31 20:46:34,760 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 203 [2022-01-31 20:46:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:46:34,760 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2022-01-31 20:46:34,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 143 states have (on average 1.3916083916083917) internal successors, (199), 142 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2022-01-31 20:46:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 20:46:34,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:46:34,761 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 56, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:46:34,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 20:46:34,762 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:46:34,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:46:34,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1341848457, now seen corresponding path program 64 times [2022-01-31 20:46:34,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:46:34,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995886756] [2022-01-31 20:46:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:46:34,802 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:34,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:34,838 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:46:34,876 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:34,928 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:34,928 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:46:34,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:46:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:34,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:46:40,736 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:40,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995886756] [2022-01-31 20:46:40,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995886756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:40,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:40,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 20:46:40,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564978819] [2022-01-31 20:46:40,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:40,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 20:46:40,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:40,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 20:46:40,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=21074, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 20:46:40,738 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 146 states, 145 states have (on average 1.393103448275862) internal successors, (202), 144 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:50,963 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2022-01-31 20:46:50,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 20:46:50,964 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 1.393103448275862) internal successors, (202), 144 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-01-31 20:46:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:50,964 INFO L225 Difference]: With dead ends: 220 [2022-01-31 20:46:50,964 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 20:46:50,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27414 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1109, Invalid=80973, Unknown=0, NotChecked=0, Total=82082 [2022-01-31 20:46:50,968 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 257 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 21808 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 21887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 21808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:50,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 547 Invalid, 21887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 21808 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-01-31 20:46:50,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 20:46:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-01-31 20:46:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2022-01-31 20:46:51,035 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 206 [2022-01-31 20:46:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:46:51,036 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2022-01-31 20:46:51,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 145 states have (on average 1.393103448275862) internal successors, (202), 144 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:51,036 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2022-01-31 20:46:51,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 20:46:51,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:46:51,037 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 57, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:46:51,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 20:46:51,037 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:46:51,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:46:51,037 INFO L85 PathProgramCache]: Analyzing trace with hash 776210094, now seen corresponding path program 65 times [2022-01-31 20:46:51,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:46:51,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816522407] [2022-01-31 20:46:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:46:51,094 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:51,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:51,133 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:46:51,172 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:51,209 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:46:51,209 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:46:51,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:46:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:51,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:46:57,156 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:57,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816522407] [2022-01-31 20:46:57,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1816522407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:57,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:57,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 20:46:57,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311110236] [2022-01-31 20:46:57,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:57,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 20:46:57,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:57,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 20:46:57,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=21659, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 20:46:57,158 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand has 148 states, 147 states have (on average 1.3945578231292517) internal successors, (205), 146 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:47:07,773 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2022-01-31 20:47:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 20:47:07,774 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 147 states have (on average 1.3945578231292517) internal successors, (205), 146 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-01-31 20:47:07,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:47:07,774 INFO L225 Difference]: With dead ends: 223 [2022-01-31 20:47:07,774 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 20:47:07,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28173 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1124, Invalid=83266, Unknown=0, NotChecked=0, Total=84390 [2022-01-31 20:47:07,777 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 262 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 22748 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 22828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 22748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:47:07,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 562 Invalid, 22828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 22748 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-01-31 20:47:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 20:47:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-01-31 20:47:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0095693779904307) internal successors, (211), 209 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2022-01-31 20:47:07,816 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 209 [2022-01-31 20:47:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:47:07,817 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2022-01-31 20:47:07,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 147 states have (on average 1.3945578231292517) internal successors, (205), 146 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2022-01-31 20:47:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 20:47:07,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:47:07,818 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 58, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:47:07,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 20:47:07,818 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:47:07,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:47:07,818 INFO L85 PathProgramCache]: Analyzing trace with hash -999559831, now seen corresponding path program 66 times [2022-01-31 20:47:07,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:47:07,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116254153] [2022-01-31 20:47:07,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:47:07,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:47:07,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:47:07,926 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:47:07,974 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:47:08,047 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:47:08,047 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:47:08,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:47:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:08,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:47:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:47:14,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:47:14,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116254153] [2022-01-31 20:47:14,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1116254153] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:47:14,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:47:14,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-01-31 20:47:14,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239765005] [2022-01-31 20:47:14,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:47:14,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-01-31 20:47:14,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:47:14,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-01-31 20:47:14,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=22252, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 20:47:14,230 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand has 150 states, 149 states have (on average 1.395973154362416) internal successors, (208), 148 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:25,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:47:25,583 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2022-01-31 20:47:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 20:47:25,583 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 149 states have (on average 1.395973154362416) internal successors, (208), 148 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2022-01-31 20:47:25,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:47:25,584 INFO L225 Difference]: With dead ends: 226 [2022-01-31 20:47:25,584 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 20:47:25,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28946 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1139, Invalid=85591, Unknown=0, NotChecked=0, Total=86730 [2022-01-31 20:47:25,586 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 265 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 24943 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 25024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 24943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:47:25,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 607 Invalid, 25024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 24943 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-01-31 20:47:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 20:47:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2022-01-31 20:47:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2022-01-31 20:47:25,638 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 212 [2022-01-31 20:47:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:47:25,638 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2022-01-31 20:47:25,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 149 states have (on average 1.395973154362416) internal successors, (208), 148 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2022-01-31 20:47:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 20:47:25,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:47:25,640 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 59, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:47:25,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 20:47:25,640 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:47:25,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:47:25,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1849210674, now seen corresponding path program 67 times [2022-01-31 20:47:25,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:47:25,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142663365] [2022-01-31 20:47:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:47:25,702 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:47:25,751 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:47:25,751 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:47:25,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:47:25,840 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:47:25,840 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:47:25,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:47:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:25,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:47:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:47:32,222 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:47:32,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142663365] [2022-01-31 20:47:32,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1142663365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:47:32,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:47:32,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-01-31 20:47:32,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141347074] [2022-01-31 20:47:32,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:47:32,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 20:47:32,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:47:32,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 20:47:32,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=22853, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 20:47:32,224 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 152 states, 151 states have (on average 1.3973509933774835) internal successors, (211), 150 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:47:43,756 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2022-01-31 20:47:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 20:47:43,756 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 151 states have (on average 1.3973509933774835) internal successors, (211), 150 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 20:47:43,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:47:43,757 INFO L225 Difference]: With dead ends: 229 [2022-01-31 20:47:43,757 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 20:47:43,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29725 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1154, Invalid=87948, Unknown=0, NotChecked=0, Total=89102 [2022-01-31 20:47:43,760 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 269 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 25094 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 25176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 25094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:47:43,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 602 Invalid, 25176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 25094 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-01-31 20:47:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 20:47:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-01-31 20:47:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2022-01-31 20:47:43,794 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 215 [2022-01-31 20:47:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:47:43,794 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2022-01-31 20:47:43,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 151 states have (on average 1.3973509933774835) internal successors, (211), 150 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:43,794 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2022-01-31 20:47:43,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 20:47:43,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:47:43,795 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 60, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:47:43,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 20:47:43,795 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:47:43,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:47:43,796 INFO L85 PathProgramCache]: Analyzing trace with hash 739768137, now seen corresponding path program 68 times [2022-01-31 20:47:43,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:47:43,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313836040] [2022-01-31 20:47:43,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:47:43,858 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:47:43,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:47:43,907 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:47:43,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:47:44,018 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:47:44,018 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:47:44,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:47:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:44,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:47:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:47:50,631 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:47:50,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313836040] [2022-01-31 20:47:50,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1313836040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:47:50,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:47:50,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-01-31 20:47:50,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603266977] [2022-01-31 20:47:50,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:47:50,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-01-31 20:47:50,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:47:50,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-01-31 20:47:50,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=23462, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 20:47:50,633 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 154 states, 153 states have (on average 1.3986928104575163) internal successors, (214), 152 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:01,877 INFO L93 Difference]: Finished difference Result 232 states and 236 transitions. [2022-01-31 20:48:01,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 20:48:01,877 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 153 states have (on average 1.3986928104575163) internal successors, (214), 152 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2022-01-31 20:48:01,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:01,878 INFO L225 Difference]: With dead ends: 232 [2022-01-31 20:48:01,878 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 20:48:01,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30516 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1169, Invalid=90337, Unknown=0, NotChecked=0, Total=91506 [2022-01-31 20:48:01,881 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 273 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 23534 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 23617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 23534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:01,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 557 Invalid, 23617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 23534 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-01-31 20:48:01,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 20:48:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2022-01-31 20:48:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2022-01-31 20:48:01,936 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 218 [2022-01-31 20:48:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:01,936 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2022-01-31 20:48:01,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 153 states have (on average 1.3986928104575163) internal successors, (214), 152 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2022-01-31 20:48:01,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 20:48:01,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:01,937 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 61, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:01,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 20:48:01,937 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:01,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:01,938 INFO L85 PathProgramCache]: Analyzing trace with hash -15174930, now seen corresponding path program 69 times [2022-01-31 20:48:01,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:01,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139427427] [2022-01-31 20:48:01,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:01,990 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:48:02,030 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:48:02,030 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:48:02,069 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:48:02,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:48:02,136 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:48:02,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:02,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:08,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:08,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139427427] [2022-01-31 20:48:08,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2139427427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:08,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:08,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-01-31 20:48:08,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836607041] [2022-01-31 20:48:08,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:08,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-01-31 20:48:08,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:08,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-01-31 20:48:08,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=24079, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 20:48:08,885 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand has 156 states, 155 states have (on average 1.4) internal successors, (217), 154 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:20,810 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2022-01-31 20:48:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-31 20:48:20,810 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 155 states have (on average 1.4) internal successors, (217), 154 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-01-31 20:48:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:20,811 INFO L225 Difference]: With dead ends: 235 [2022-01-31 20:48:20,811 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 20:48:20,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31317 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1184, Invalid=92758, Unknown=0, NotChecked=0, Total=93942 [2022-01-31 20:48:20,815 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 277 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 25160 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 25244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 25160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:20,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 587 Invalid, 25244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 25160 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-01-31 20:48:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 20:48:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-01-31 20:48:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2022-01-31 20:48:20,854 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 221 [2022-01-31 20:48:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:20,854 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2022-01-31 20:48:20,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 155 states have (on average 1.4) internal successors, (217), 154 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2022-01-31 20:48:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-31 20:48:20,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:20,873 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 62, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:20,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 20:48:20,873 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2075322071, now seen corresponding path program 70 times [2022-01-31 20:48:20,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:20,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498245891] [2022-01-31 20:48:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:20,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:48:20,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:48:20,972 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:48:21,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:48:21,053 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:48:21,054 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:48:21,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:21,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:28,031 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:28,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498245891] [2022-01-31 20:48:28,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1498245891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:28,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:28,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2022-01-31 20:48:28,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276422135] [2022-01-31 20:48:28,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:28,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-01-31 20:48:28,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:28,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-01-31 20:48:28,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=24704, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 20:48:28,033 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 158 states, 157 states have (on average 1.4012738853503184) internal successors, (220), 156 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:40,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:40,525 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2022-01-31 20:48:40,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-31 20:48:40,525 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 157 states have (on average 1.4012738853503184) internal successors, (220), 156 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2022-01-31 20:48:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:40,526 INFO L225 Difference]: With dead ends: 238 [2022-01-31 20:48:40,526 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 20:48:40,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32128 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1199, Invalid=95211, Unknown=0, NotChecked=0, Total=96410 [2022-01-31 20:48:40,529 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 282 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 26826 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 26911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 26826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:40,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 617 Invalid, 26911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 26826 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-01-31 20:48:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 20:48:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2022-01-31 20:48:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2022-01-31 20:48:40,568 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 224 [2022-01-31 20:48:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:40,569 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2022-01-31 20:48:40,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 157 states have (on average 1.4012738853503184) internal successors, (220), 156 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2022-01-31 20:48:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 20:48:40,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:40,570 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 63, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:40,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 20:48:40,570 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:40,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:40,570 INFO L85 PathProgramCache]: Analyzing trace with hash -836139762, now seen corresponding path program 71 times [2022-01-31 20:48:40,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:40,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857894729] [2022-01-31 20:48:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:40,626 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:48:40,655 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:48:40,656 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:48:40,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:48:40,734 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:48:40,735 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:48:40,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:40,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:47,828 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:47,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857894729] [2022-01-31 20:48:47,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857894729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:47,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:47,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2022-01-31 20:48:47,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083557693] [2022-01-31 20:48:47,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:47,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2022-01-31 20:48:47,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:47,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2022-01-31 20:48:47,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=25337, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 20:48:47,830 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 160 states, 159 states have (on average 1.4025157232704402) internal successors, (223), 158 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:00,693 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2022-01-31 20:49:00,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-31 20:49:00,694 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 159 states have (on average 1.4025157232704402) internal successors, (223), 158 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 20:49:00,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:00,694 INFO L225 Difference]: With dead ends: 241 [2022-01-31 20:49:00,694 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 20:49:00,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32949 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1214, Invalid=97696, Unknown=0, NotChecked=0, Total=98910 [2022-01-31 20:49:00,698 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 286 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 27860 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 27946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 27860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:00,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 632 Invalid, 27946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 27860 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-01-31 20:49:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 20:49:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2022-01-31 20:49:00,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.0088105726872247) internal successors, (229), 227 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2022-01-31 20:49:00,735 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 227 [2022-01-31 20:49:00,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:00,735 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2022-01-31 20:49:00,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 159 states have (on average 1.4025157232704402) internal successors, (223), 158 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2022-01-31 20:49:00,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 20:49:00,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:00,736 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 64, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:00,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 20:49:00,736 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:00,736 INFO L85 PathProgramCache]: Analyzing trace with hash 400118537, now seen corresponding path program 72 times [2022-01-31 20:49:00,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:00,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508115475] [2022-01-31 20:49:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:00,777 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:49:00,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:49:00,817 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:49:00,845 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:49:00,884 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:49:00,884 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:49:00,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:00,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:49:08,079 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:08,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508115475] [2022-01-31 20:49:08,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508115475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:08,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:08,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-01-31 20:49:08,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160092386] [2022-01-31 20:49:08,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:08,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-01-31 20:49:08,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-01-31 20:49:08,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=25978, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 20:49:08,081 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand has 162 states, 161 states have (on average 1.4037267080745341) internal successors, (226), 160 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:21,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:21,409 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2022-01-31 20:49:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-31 20:49:21,410 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 161 states have (on average 1.4037267080745341) internal successors, (226), 160 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2022-01-31 20:49:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:21,410 INFO L225 Difference]: With dead ends: 244 [2022-01-31 20:49:21,410 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 20:49:21,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33780 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1229, Invalid=100213, Unknown=0, NotChecked=0, Total=101442 [2022-01-31 20:49:21,414 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 289 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 29362 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 29449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 29362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:21,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 657 Invalid, 29449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 29362 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-01-31 20:49:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 20:49:21,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2022-01-31 20:49:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2022-01-31 20:49:21,470 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 230 [2022-01-31 20:49:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:21,470 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2022-01-31 20:49:21,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 161 states have (on average 1.4037267080745341) internal successors, (226), 160 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:21,471 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2022-01-31 20:49:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 20:49:21,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:21,471 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 65, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:21,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 20:49:21,472 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:21,472 INFO L85 PathProgramCache]: Analyzing trace with hash 426540846, now seen corresponding path program 73 times [2022-01-31 20:49:21,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:21,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414814951] [2022-01-31 20:49:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:21,526 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:49:21,566 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:49:21,566 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:49:21,606 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:49:21,658 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:49:21,659 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:49:21,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:21,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:49:29,022 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:29,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414814951] [2022-01-31 20:49:29,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1414814951] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:29,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:29,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2022-01-31 20:49:29,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912429660] [2022-01-31 20:49:29,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:29,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-01-31 20:49:29,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:29,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-01-31 20:49:29,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=26627, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 20:49:29,024 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 164 states, 163 states have (on average 1.4049079754601228) internal successors, (229), 162 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:42,514 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2022-01-31 20:49:42,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-31 20:49:42,519 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 163 states have (on average 1.4049079754601228) internal successors, (229), 162 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-01-31 20:49:42,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:42,519 INFO L225 Difference]: With dead ends: 247 [2022-01-31 20:49:42,519 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 20:49:42,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34621 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1244, Invalid=102762, Unknown=0, NotChecked=0, Total=104006 [2022-01-31 20:49:42,523 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 293 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 29521 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 29609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 29521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:42,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 652 Invalid, 29609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 29521 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-01-31 20:49:42,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 20:49:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-01-31 20:49:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.0085836909871244) internal successors, (235), 233 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2022-01-31 20:49:42,571 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 233 [2022-01-31 20:49:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:42,571 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2022-01-31 20:49:42,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 163 states have (on average 1.4049079754601228) internal successors, (229), 162 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2022-01-31 20:49:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-31 20:49:42,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:42,572 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 66, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:42,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 20:49:42,573 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:42,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1594533097, now seen corresponding path program 74 times [2022-01-31 20:49:42,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:42,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471418062] [2022-01-31 20:49:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:42,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:49:42,653 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:49:42,653 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:49:42,682 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:49:42,731 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:49:42,732 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:49:42,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:42,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:49:50,291 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:50,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471418062] [2022-01-31 20:49:50,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [471418062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:50,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:50,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [166] imperfect sequences [] total 166 [2022-01-31 20:49:50,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984172401] [2022-01-31 20:49:50,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:50,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-01-31 20:49:50,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:50,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-01-31 20:49:50,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=27284, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 20:49:50,293 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand has 166 states, 165 states have (on average 1.406060606060606) internal successors, (232), 164 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:03,591 INFO L93 Difference]: Finished difference Result 250 states and 254 transitions. [2022-01-31 20:50:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-01-31 20:50:03,591 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 165 states have (on average 1.406060606060606) internal successors, (232), 164 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2022-01-31 20:50:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:03,592 INFO L225 Difference]: With dead ends: 250 [2022-01-31 20:50:03,592 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 20:50:03,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35474 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1259, Invalid=105343, Unknown=0, NotChecked=0, Total=106602 [2022-01-31 20:50:03,596 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 297 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 28527 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 28616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 28527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:03,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 622 Invalid, 28616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 28527 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-01-31 20:50:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 20:50:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2022-01-31 20:50:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2022-01-31 20:50:03,638 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 236 [2022-01-31 20:50:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:03,638 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2022-01-31 20:50:03,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 165 states have (on average 1.406060606060606) internal successors, (232), 164 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2022-01-31 20:50:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 20:50:03,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:03,640 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 67, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:03,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 20:50:03,640 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:03,640 INFO L85 PathProgramCache]: Analyzing trace with hash -573349554, now seen corresponding path program 75 times [2022-01-31 20:50:03,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:03,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406099164] [2022-01-31 20:50:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:03,708 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:50:03,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:50:03,738 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:50:03,767 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:50:03,818 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:50:03,819 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:50:03,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:03,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:50:11,558 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:11,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406099164] [2022-01-31 20:50:11,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406099164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:11,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:11,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-01-31 20:50:11,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609314639] [2022-01-31 20:50:11,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:11,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-01-31 20:50:11,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:11,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-01-31 20:50:11,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=27949, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 20:50:11,561 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 168 states, 167 states have (on average 1.407185628742515) internal successors, (235), 166 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:25,460 INFO L93 Difference]: Finished difference Result 253 states and 257 transitions. [2022-01-31 20:50:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-01-31 20:50:25,460 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 167 states have (on average 1.407185628742515) internal successors, (235), 166 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-01-31 20:50:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:25,461 INFO L225 Difference]: With dead ends: 253 [2022-01-31 20:50:25,461 INFO L226 Difference]: Without dead ends: 245 [2022-01-31 20:50:25,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36335 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1274, Invalid=107956, Unknown=0, NotChecked=0, Total=109230 [2022-01-31 20:50:25,464 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 301 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 30301 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 30391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 30301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:25,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 652 Invalid, 30391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 30301 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-01-31 20:50:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-31 20:50:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-01-31 20:50:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.00836820083682) internal successors, (241), 239 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2022-01-31 20:50:25,520 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 239 [2022-01-31 20:50:25,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:25,520 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2022-01-31 20:50:25,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 167 states have (on average 1.407185628742515) internal successors, (235), 166 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2022-01-31 20:50:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 20:50:25,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:25,521 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 68, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:25,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 20:50:25,521 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:25,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:25,522 INFO L85 PathProgramCache]: Analyzing trace with hash -542175543, now seen corresponding path program 76 times [2022-01-31 20:50:25,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:25,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820470164] [2022-01-31 20:50:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:25,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:50:25,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:50:25,617 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:50:25,645 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:50:25,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:50:25,696 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:50:25,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:25,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:50:33,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:33,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820470164] [2022-01-31 20:50:33,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820470164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:33,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:33,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-01-31 20:50:33,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328244481] [2022-01-31 20:50:33,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:33,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-01-31 20:50:33,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:33,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-01-31 20:50:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=28622, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 20:50:33,604 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand has 170 states, 169 states have (on average 1.4082840236686391) internal successors, (238), 168 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:48,461 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2022-01-31 20:50:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-01-31 20:50:48,461 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 169 states have (on average 1.4082840236686391) internal successors, (238), 168 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2022-01-31 20:50:48,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:48,462 INFO L225 Difference]: With dead ends: 256 [2022-01-31 20:50:48,462 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 20:50:48,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37206 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=1289, Invalid=110601, Unknown=0, NotChecked=0, Total=111890 [2022-01-31 20:50:48,465 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 305 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 33058 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 33149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 33058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:48,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 702 Invalid, 33149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 33058 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-01-31 20:50:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 20:50:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-01-31 20:50:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0082644628099173) internal successors, (244), 242 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2022-01-31 20:50:48,508 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 242 [2022-01-31 20:50:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:48,508 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2022-01-31 20:50:48,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 169 states have (on average 1.4082840236686391) internal successors, (238), 168 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2022-01-31 20:50:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 20:50:48,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:48,509 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 69, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:48,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 20:50:48,509 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:48,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:48,509 INFO L85 PathProgramCache]: Analyzing trace with hash 449850222, now seen corresponding path program 77 times [2022-01-31 20:50:48,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:48,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387350953] [2022-01-31 20:50:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:48,560 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:50:48,589 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:50:48,589 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:50:48,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:50:48,680 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:50:48,680 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:50:48,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:48,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.