/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/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:12:21,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:12:21,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:12:21,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:12:21,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:12:21,942 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:12:21,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:12:21,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:12:21,944 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:12:21,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:12:21,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:12:21,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:12:21,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:12:21,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:12:21,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:12:21,945 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:12:21,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:12:21,945 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:12:21,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:12:21,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:12:21,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:12:21,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:12:21,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:12:21,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:12:21,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:12:21,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:12:21,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:12:21,947 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:12:21,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:12:22,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:12:22,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:12:22,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:12:22,205 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:12:22,205 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:12:22,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2022-02-24 01:12:22,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c932f08b4/77d1af0eb8fd42b89ff049b6d5498c1e/FLAG6ccd682bd [2022-02-24 01:12:22,638 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:12:22,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2022-02-24 01:12:22,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c932f08b4/77d1af0eb8fd42b89ff049b6d5498c1e/FLAG6ccd682bd [2022-02-24 01:12:22,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c932f08b4/77d1af0eb8fd42b89ff049b6d5498c1e [2022-02-24 01:12:22,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:12:22,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:12:22,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:12:22,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:12:22,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:12:22,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52978461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22, skipping insertion in model container [2022-02-24 01:12:22,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:12:22,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:12:22,882 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/insertion_sort-2.c[328,341] [2022-02-24 01:12:22,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:12:22,908 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:12:22,917 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/insertion_sort-2.c[328,341] [2022-02-24 01:12:22,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:12:22,935 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:12:22,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22 WrapperNode [2022-02-24 01:12:22,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:12:22,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:12:22,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:12:22,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:12:22,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:12:22,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:12:22,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:12:22,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:12:22,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:12:23,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:12:23,012 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) [2022-02-24 01:12:23,014 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 [2022-02-24 01:12:23,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:12:23,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:12:23,042 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:12:23,042 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 01:12:23,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:12:23,043 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:12:23,043 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:12:23,043 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:12:23,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:12:23,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 01:12:23,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-24 01:12:23,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 01:12:23,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:12:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 01:12:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:12:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:12:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:12:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:12:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:12:23,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:12:23,099 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:12:23,100 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:12:23,207 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:12:23,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:12:23,213 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-24 01:12:23,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:12:23 BoogieIcfgContainer [2022-02-24 01:12:23,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:12:23,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:12:23,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:12:23,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:12:23,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:12:22" (1/3) ... [2022-02-24 01:12:23,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee15233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:12:23, skipping insertion in model container [2022-02-24 01:12:23,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (2/3) ... [2022-02-24 01:12:23,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee15233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:12:23, skipping insertion in model container [2022-02-24 01:12:23,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:12:23" (3/3) ... [2022-02-24 01:12:23,237 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2022-02-24 01:12:23,241 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:12:23,241 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:12:23,307 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:12:23,313 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 [2022-02-24 01:12:23,313 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:12:23,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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) [2022-02-24 01:12:23,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 01:12:23,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:23,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:23,354 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:23,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:23,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1914549692, now seen corresponding path program 1 times [2022-02-24 01:12:23,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:23,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622053117] [2022-02-24 01:12:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:23,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:23,435 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:12:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:23,625 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:23,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622053117] [2022-02-24 01:12:23,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [622053117] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:23,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:23,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 01:12:23,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962118508] [2022-02-24 01:12:23,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:23,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 01:12:23,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:23,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 01:12:23,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 01:12:23,668 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:23,740 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-02-24 01:12:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 01:12:23,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 01:12:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:23,748 INFO L225 Difference]: With dead ends: 54 [2022-02-24 01:12:23,748 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 01:12:23,751 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 [2022-02-24 01:12:23,755 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 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 [2022-02-24 01:12:23,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:12:23,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 01:12:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-24 01:12:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-02-24 01:12:23,794 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-02-24 01:12:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:23,794 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-02-24 01:12:23,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:23,795 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-02-24 01:12:23,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-24 01:12:23,796 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:23,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:23,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:12:23,798 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash 314290466, now seen corresponding path program 1 times [2022-02-24 01:12:23,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:23,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522613159] [2022-02-24 01:12:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:23,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:23,806 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:12:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:23,992 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:23,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522613159] [2022-02-24 01:12:23,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522613159] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:23,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:23,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:12:23,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556041390] [2022-02-24 01:12:23,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:23,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:12:23,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:23,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:12:23,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:12:23,995 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:24,165 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-02-24 01:12:24,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:12:24,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-24 01:12:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:24,167 INFO L225 Difference]: With dead ends: 49 [2022-02-24 01:12:24,167 INFO L226 Difference]: Without dead ends: 28 [2022-02-24 01:12:24,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:12:24,175 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:24,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-24 01:12:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-02-24 01:12:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-24 01:12:24,188 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2022-02-24 01:12:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:24,189 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-24 01:12:24,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:24,190 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-24 01:12:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 01:12:24,192 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:24,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:24,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:12:24,193 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:24,198 INFO L85 PathProgramCache]: Analyzing trace with hash 408725728, now seen corresponding path program 1 times [2022-02-24 01:12:24,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:24,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19266877] [2022-02-24 01:12:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:24,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:24,222 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:24,223 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:24,223 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:24,446 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:24,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19266877] [2022-02-24 01:12:24,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [19266877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:24,447 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:24,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:24,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965314533] [2022-02-24 01:12:24,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:24,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:24,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:24,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:24,449 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:24,674 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-02-24 01:12:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:12:24,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 01:12:24,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:24,676 INFO L225 Difference]: With dead ends: 49 [2022-02-24 01:12:24,676 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 01:12:24,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:12:24,678 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:24,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 41 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 01:12:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-02-24 01:12:24,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-02-24 01:12:24,686 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2022-02-24 01:12:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:24,686 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-02-24 01:12:24,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-02-24 01:12:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 01:12:24,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:24,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:24,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:12:24,687 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:24,688 INFO L85 PathProgramCache]: Analyzing trace with hash 966699294, now seen corresponding path program 2 times [2022-02-24 01:12:24,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:24,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367278070] [2022-02-24 01:12:24,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:24,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:24,703 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:24,703 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:24,703 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:24,864 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:24,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367278070] [2022-02-24 01:12:24,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1367278070] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:24,864 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:24,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:12:24,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143981467] [2022-02-24 01:12:24,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:24,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:12:24,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:24,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:12:24,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:24,866 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:25,137 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-02-24 01:12:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:12:25,138 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 01:12:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:25,140 INFO L225 Difference]: With dead ends: 58 [2022-02-24 01:12:25,140 INFO L226 Difference]: Without dead ends: 47 [2022-02-24 01:12:25,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:12:25,142 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 99 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:25,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 44 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:25,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-24 01:12:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2022-02-24 01:12:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:25,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-02-24 01:12:25,157 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2022-02-24 01:12:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:25,157 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-02-24 01:12:25,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-02-24 01:12:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:12:25,158 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:25,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:25,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:12:25,158 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:25,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1080556849, now seen corresponding path program 1 times [2022-02-24 01:12:25,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:25,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404211782] [2022-02-24 01:12:25,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:25,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:25,163 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:25,163 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:25,163 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:25,614 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:25,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404211782] [2022-02-24 01:12:25,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [404211782] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:25,614 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:25,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:12:25,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109370073] [2022-02-24 01:12:25,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:25,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:12:25,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:25,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:12:25,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:25,617 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:26,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:26,182 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-02-24 01:12:26,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:12:26,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 01:12:26,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:26,184 INFO L225 Difference]: With dead ends: 65 [2022-02-24 01:12:26,185 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 01:12:26,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:12:26,186 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:26,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 60 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 01:12:26,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 44. [2022-02-24 01:12:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-02-24 01:12:26,204 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-02-24 01:12:26,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:26,204 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-02-24 01:12:26,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:26,205 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-02-24 01:12:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:12:26,205 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:26,205 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:26,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:12:26,206 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:26,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:26,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1781621427, now seen corresponding path program 1 times [2022-02-24 01:12:26,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:26,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070296699] [2022-02-24 01:12:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:26,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:26,210 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:26,210 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:26,210 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:26,304 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:26,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070296699] [2022-02-24 01:12:26,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1070296699] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:26,305 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:26,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:12:26,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468237453] [2022-02-24 01:12:26,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:26,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:12:26,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:26,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:12:26,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:12:26,307 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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) [2022-02-24 01:12:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:26,423 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-02-24 01:12:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:12:26,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 25 [2022-02-24 01:12:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:26,428 INFO L225 Difference]: With dead ends: 82 [2022-02-24 01:12:26,428 INFO L226 Difference]: Without dead ends: 51 [2022-02-24 01:12:26,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:26,431 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:26,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 35 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:26,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-24 01:12:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-02-24 01:12:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-02-24 01:12:26,457 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2022-02-24 01:12:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:26,457 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-02-24 01:12:26,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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) [2022-02-24 01:12:26,458 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-02-24 01:12:26,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:12:26,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:26,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:26,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:12:26,459 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:26,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:26,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1755898038, now seen corresponding path program 1 times [2022-02-24 01:12:26,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:26,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304977618] [2022-02-24 01:12:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:26,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:26,463 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:26,463 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:26,463 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:26,885 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:26,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304977618] [2022-02-24 01:12:26,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [304977618] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:26,886 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:26,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:12:26,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897399224] [2022-02-24 01:12:26,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:26,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:12:26,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:26,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:12:26,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:12:26,887 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:27,494 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2022-02-24 01:12:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:12:27,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:12:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:27,495 INFO L225 Difference]: With dead ends: 111 [2022-02-24 01:12:27,495 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 01:12:27,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:12:27,497 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 82 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:27,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 58 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 01:12:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2022-02-24 01:12:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-02-24 01:12:27,515 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 28 [2022-02-24 01:12:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:27,515 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-02-24 01:12:27,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-02-24 01:12:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:12:27,516 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:27,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:27,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:12:27,517 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:27,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:27,517 INFO L85 PathProgramCache]: Analyzing trace with hash -990333180, now seen corresponding path program 2 times [2022-02-24 01:12:27,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:27,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443504994] [2022-02-24 01:12:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:27,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:27,520 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:27,520 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:27,521 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:27,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:27,615 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:27,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443504994] [2022-02-24 01:12:27,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [443504994] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:27,615 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:27,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:12:27,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525796236] [2022-02-24 01:12:27,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:27,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:12:27,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:12:27,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:27,617 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:27,872 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2022-02-24 01:12:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:12:27,873 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 01:12:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:27,873 INFO L225 Difference]: With dead ends: 125 [2022-02-24 01:12:27,873 INFO L226 Difference]: Without dead ends: 91 [2022-02-24 01:12:27,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:12:27,874 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 104 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:27,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 60 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-24 01:12:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2022-02-24 01:12:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-02-24 01:12:27,901 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 31 [2022-02-24 01:12:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:27,901 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-02-24 01:12:27,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-02-24 01:12:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 01:12:27,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:27,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:27,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:12:27,903 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:27,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:27,903 INFO L85 PathProgramCache]: Analyzing trace with hash -405243253, now seen corresponding path program 1 times [2022-02-24 01:12:27,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:27,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279435796] [2022-02-24 01:12:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:27,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:27,906 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:27,906 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:27,907 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:28,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:28,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:12:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:28,010 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:28,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279435796] [2022-02-24 01:12:28,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1279435796] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:28,010 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:28,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:12:28,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762378637] [2022-02-24 01:12:28,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:28,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:12:28,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:28,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:12:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:28,012 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:28,272 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2022-02-24 01:12:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:12:28,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-02-24 01:12:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:28,273 INFO L225 Difference]: With dead ends: 100 [2022-02-24 01:12:28,273 INFO L226 Difference]: Without dead ends: 73 [2022-02-24 01:12:28,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:28,274 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:28,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 48 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-24 01:12:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2022-02-24 01:12:28,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.2) internal successors, (60), 51 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-02-24 01:12:28,296 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 33 [2022-02-24 01:12:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:28,296 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-02-24 01:12:28,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:28,296 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-02-24 01:12:28,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 01:12:28,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:28,297 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:28,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:12:28,298 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:28,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1306424002, now seen corresponding path program 3 times [2022-02-24 01:12:28,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:28,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889390328] [2022-02-24 01:12:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:28,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:28,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:28,302 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:28,302 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:28,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:28,641 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:28,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889390328] [2022-02-24 01:12:28,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1889390328] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:28,642 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:28,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:12:28,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119373445] [2022-02-24 01:12:28,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:28,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:12:28,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:28,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:12:28,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:12:28,643 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:29,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:29,517 INFO L93 Difference]: Finished difference Result 135 states and 164 transitions. [2022-02-24 01:12:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:12:29,518 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 01:12:29,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:29,520 INFO L225 Difference]: With dead ends: 135 [2022-02-24 01:12:29,521 INFO L226 Difference]: Without dead ends: 101 [2022-02-24 01:12:29,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:12:29,523 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 109 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:29,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 51 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-24 01:12:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2022-02-24 01:12:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 64 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-02-24 01:12:29,558 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 33 [2022-02-24 01:12:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:29,558 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-02-24 01:12:29,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-02-24 01:12:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:12:29,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:29,559 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:29,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:12:29,559 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:29,560 INFO L85 PathProgramCache]: Analyzing trace with hash -350564349, now seen corresponding path program 1 times [2022-02-24 01:12:29,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:29,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006669825] [2022-02-24 01:12:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:29,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:29,563 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:29,563 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:29,564 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:29,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:29,853 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:29,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006669825] [2022-02-24 01:12:29,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2006669825] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:29,854 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:29,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:12:29,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778836640] [2022-02-24 01:12:29,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:29,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:12:29,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:12:29,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:29,855 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:30,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:30,734 INFO L93 Difference]: Finished difference Result 179 states and 227 transitions. [2022-02-24 01:12:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:12:30,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:12:30,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:30,736 INFO L225 Difference]: With dead ends: 179 [2022-02-24 01:12:30,736 INFO L226 Difference]: Without dead ends: 177 [2022-02-24 01:12:30,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:12:30,737 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 199 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:30,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 52 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:30,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-24 01:12:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 86. [2022-02-24 01:12:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 79 states have internal predecessors, (102), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2022-02-24 01:12:30,782 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 36 [2022-02-24 01:12:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:30,782 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2022-02-24 01:12:30,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2022-02-24 01:12:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:12:30,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:30,783 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:30,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:12:30,783 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:30,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1169352267, now seen corresponding path program 2 times [2022-02-24 01:12:30,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:30,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222149411] [2022-02-24 01:12:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:30,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:30,787 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:30,787 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:30,787 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:31,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:31,298 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:31,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222149411] [2022-02-24 01:12:31,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [222149411] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:31,298 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:31,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:12:31,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638529379] [2022-02-24 01:12:31,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:31,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:12:31,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:12:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:12:31,300 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:32,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:32,397 INFO L93 Difference]: Finished difference Result 211 states and 272 transitions. [2022-02-24 01:12:32,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:12:32,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:12:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:32,399 INFO L225 Difference]: With dead ends: 211 [2022-02-24 01:12:32,399 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:12:32,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1838, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:12:32,400 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 124 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:32,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 83 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:12:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:12:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 97. [2022-02-24 01:12:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 90 states have internal predecessors, (117), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2022-02-24 01:12:32,442 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 36 [2022-02-24 01:12:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:32,442 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2022-02-24 01:12:32,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2022-02-24 01:12:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 01:12:32,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:32,443 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:32,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:12:32,443 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:32,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:32,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1631396062, now seen corresponding path program 2 times [2022-02-24 01:12:32,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:32,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382363038] [2022-02-24 01:12:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:32,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:32,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:32,447 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:32,447 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:32,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:32,503 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:32,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382363038] [2022-02-24 01:12:32,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [382363038] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:32,504 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:32,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:12:32,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617806630] [2022-02-24 01:12:32,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:32,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:12:32,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:32,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:12:32,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:32,505 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2022-02-24 01:12:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:32,807 INFO L93 Difference]: Finished difference Result 172 states and 219 transitions. [2022-02-24 01:12:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:12:32,808 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 39 [2022-02-24 01:12:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:32,809 INFO L225 Difference]: With dead ends: 172 [2022-02-24 01:12:32,809 INFO L226 Difference]: Without dead ends: 108 [2022-02-24 01:12:32,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:12:32,810 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:32,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 52 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-24 01:12:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 74. [2022-02-24 01:12:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 67 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-02-24 01:12:32,840 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 39 [2022-02-24 01:12:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:32,841 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-02-24 01:12:32,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2022-02-24 01:12:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-02-24 01:12:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 01:12:32,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:32,842 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:32,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:12:32,842 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:32,842 INFO L85 PathProgramCache]: Analyzing trace with hash -930331484, now seen corresponding path program 3 times [2022-02-24 01:12:32,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:32,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628522058] [2022-02-24 01:12:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:32,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:32,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:32,845 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:32,845 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:33,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:33,274 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:33,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628522058] [2022-02-24 01:12:33,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628522058] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:33,274 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:33,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:12:33,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544465707] [2022-02-24 01:12:33,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:33,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:12:33,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:33,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:12:33,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:12:33,276 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:34,230 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2022-02-24 01:12:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:12:34,231 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 01:12:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:34,232 INFO L225 Difference]: With dead ends: 131 [2022-02-24 01:12:34,232 INFO L226 Difference]: Without dead ends: 129 [2022-02-24 01:12:34,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:12:34,234 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 161 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:34,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 57 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:34,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-24 01:12:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 74. [2022-02-24 01:12:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 67 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-02-24 01:12:34,265 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 39 [2022-02-24 01:12:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:34,265 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-02-24 01:12:34,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-02-24 01:12:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 01:12:34,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:34,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:34,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:12:34,266 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:34,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:34,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1624035100, now seen corresponding path program 2 times [2022-02-24 01:12:34,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:34,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813678699] [2022-02-24 01:12:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:34,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:34,269 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:34,269 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:34,269 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:34,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:34,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:12:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:34,521 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:34,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813678699] [2022-02-24 01:12:34,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [813678699] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:34,521 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:34,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:12:34,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512430789] [2022-02-24 01:12:34,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:34,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:12:34,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:34,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:12:34,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:12:34,522 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:35,168 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2022-02-24 01:12:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:12:35,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-02-24 01:12:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:35,169 INFO L225 Difference]: With dead ends: 114 [2022-02-24 01:12:35,169 INFO L226 Difference]: Without dead ends: 112 [2022-02-24 01:12:35,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 01:12:35,171 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 130 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:35,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 78 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:35,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-24 01:12:35,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2022-02-24 01:12:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 84 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2022-02-24 01:12:35,214 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 41 [2022-02-24 01:12:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:35,215 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2022-02-24 01:12:35,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2022-02-24 01:12:35,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:12:35,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:35,216 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:35,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:12:35,216 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:35,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1436661232, now seen corresponding path program 3 times [2022-02-24 01:12:35,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:35,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873011009] [2022-02-24 01:12:35,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:35,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:35,220 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:35,220 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:35,220 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:35,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:35,331 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:35,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873011009] [2022-02-24 01:12:35,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [873011009] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:35,331 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:35,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:12:35,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522439256] [2022-02-24 01:12:35,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:35,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:12:35,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:35,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:12:35,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:35,332 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:35,671 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-02-24 01:12:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:12:35,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:12:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:35,672 INFO L225 Difference]: With dead ends: 184 [2022-02-24 01:12:35,672 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:12:35,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:12:35,673 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 147 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:35,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 76 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:12:35,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2022-02-24 01:12:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2022-02-24 01:12:35,724 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 42 [2022-02-24 01:12:35,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:35,724 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2022-02-24 01:12:35,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2022-02-24 01:12:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:12:35,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:35,725 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:35,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:12:35,725 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:35,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:35,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2084807843, now seen corresponding path program 1 times [2022-02-24 01:12:35,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:35,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308572421] [2022-02-24 01:12:35,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:35,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:35,728 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:35,729 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:35,729 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:35,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:35,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-24 01:12:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:35,907 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:35,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308572421] [2022-02-24 01:12:35,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308572421] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:35,907 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:35,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:12:35,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661997162] [2022-02-24 01:12:35,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:35,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:12:35,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:12:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:12:35,908 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:36,477 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2022-02-24 01:12:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:12:36,477 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-02-24 01:12:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:36,478 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:12:36,478 INFO L226 Difference]: Without dead ends: 156 [2022-02-24 01:12:36,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:12:36,479 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 105 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:36,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 92 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-24 01:12:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2022-02-24 01:12:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2022-02-24 01:12:36,528 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 44 [2022-02-24 01:12:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:36,528 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2022-02-24 01:12:36,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2022-02-24 01:12:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:12:36,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:36,529 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:36,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:12:36,529 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:36,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1979815022, now seen corresponding path program 4 times [2022-02-24 01:12:36,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:36,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694428137] [2022-02-24 01:12:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:36,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:36,532 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:36,532 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:36,532 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:37,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:37,010 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:37,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694428137] [2022-02-24 01:12:37,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694428137] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:37,010 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:37,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:12:37,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929051602] [2022-02-24 01:12:37,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:37,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:12:37,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:37,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:12:37,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:12:37,012 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 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) [2022-02-24 01:12:37,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:37,916 INFO L93 Difference]: Finished difference Result 210 states and 257 transitions. [2022-02-24 01:12:37,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:12:37,917 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 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 [2022-02-24 01:12:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:37,918 INFO L225 Difference]: With dead ends: 210 [2022-02-24 01:12:37,918 INFO L226 Difference]: Without dead ends: 208 [2022-02-24 01:12:37,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=387, Invalid=2063, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 01:12:37,919 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 153 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:37,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 58 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:37,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-24 01:12:37,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 133. [2022-02-24 01:12:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.2377049180327868) internal successors, (151), 124 states have internal predecessors, (151), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2022-02-24 01:12:37,979 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 44 [2022-02-24 01:12:37,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:37,980 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2022-02-24 01:12:37,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 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) [2022-02-24 01:12:37,980 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2022-02-24 01:12:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:12:37,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:37,981 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:37,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:12:37,981 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:37,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1128449496, now seen corresponding path program 5 times [2022-02-24 01:12:37,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:37,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784490119] [2022-02-24 01:12:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:37,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:37,984 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:37,984 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:37,984 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:38,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:38,392 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:38,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784490119] [2022-02-24 01:12:38,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784490119] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:38,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:38,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:12:38,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504623619] [2022-02-24 01:12:38,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:38,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:12:38,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:12:38,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:12:38,394 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:39,397 INFO L93 Difference]: Finished difference Result 209 states and 254 transitions. [2022-02-24 01:12:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:12:39,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:12:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:39,398 INFO L225 Difference]: With dead ends: 209 [2022-02-24 01:12:39,398 INFO L226 Difference]: Without dead ends: 207 [2022-02-24 01:12:39,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=304, Invalid=1588, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 01:12:39,400 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 214 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:39,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 57 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-02-24 01:12:39,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 153. [2022-02-24 01:12:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 140 states have (on average 1.2357142857142858) internal successors, (173), 143 states have internal predecessors, (173), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:39,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 186 transitions. [2022-02-24 01:12:39,465 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 186 transitions. Word has length 44 [2022-02-24 01:12:39,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:39,465 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 186 transitions. [2022-02-24 01:12:39,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:39,465 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 186 transitions. [2022-02-24 01:12:39,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:12:39,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:39,466 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:39,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:12:39,466 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:39,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:39,467 INFO L85 PathProgramCache]: Analyzing trace with hash -459898406, now seen corresponding path program 4 times [2022-02-24 01:12:39,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:39,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393522882] [2022-02-24 01:12:39,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:39,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:39,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:39,469 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:39,469 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:39,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:39,516 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:39,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393522882] [2022-02-24 01:12:39,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [393522882] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:39,517 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:39,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:39,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721144736] [2022-02-24 01:12:39,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:39,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:39,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:39,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:39,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:39,518 INFO L87 Difference]: Start difference. First operand 153 states and 186 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2022-02-24 01:12:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:39,785 INFO L93 Difference]: Finished difference Result 253 states and 313 transitions. [2022-02-24 01:12:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:12:39,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 44 [2022-02-24 01:12:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:39,786 INFO L225 Difference]: With dead ends: 253 [2022-02-24 01:12:39,786 INFO L226 Difference]: Without dead ends: 180 [2022-02-24 01:12:39,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:39,787 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:39,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 51 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-02-24 01:12:39,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 152. [2022-02-24 01:12:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 142 states have internal predecessors, (164), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 177 transitions. [2022-02-24 01:12:39,877 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 177 transitions. Word has length 44 [2022-02-24 01:12:39,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:39,877 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 177 transitions. [2022-02-24 01:12:39,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2022-02-24 01:12:39,877 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 177 transitions. [2022-02-24 01:12:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:12:39,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:39,878 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:39,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:12:39,878 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:39,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:39,879 INFO L85 PathProgramCache]: Analyzing trace with hash -172816864, now seen corresponding path program 5 times [2022-02-24 01:12:39,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:39,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511003226] [2022-02-24 01:12:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:39,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:39,882 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:39,882 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:39,882 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:40,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:40,467 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:40,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511003226] [2022-02-24 01:12:40,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511003226] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:40,468 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:40,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:12:40,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187865652] [2022-02-24 01:12:40,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:40,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:12:40,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:40,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:12:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:12:40,469 INFO L87 Difference]: Start difference. First operand 152 states and 177 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2022-02-24 01:12:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:41,551 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2022-02-24 01:12:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:12:41,551 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 [2022-02-24 01:12:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:41,552 INFO L225 Difference]: With dead ends: 241 [2022-02-24 01:12:41,552 INFO L226 Difference]: Without dead ends: 239 [2022-02-24 01:12:41,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=2133, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 01:12:41,554 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 181 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:41,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 90 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:12:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-24 01:12:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 161. [2022-02-24 01:12:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 151 states have internal predecessors, (175), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 188 transitions. [2022-02-24 01:12:41,634 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 188 transitions. Word has length 44 [2022-02-24 01:12:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:41,634 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 188 transitions. [2022-02-24 01:12:41,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2022-02-24 01:12:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 188 transitions. [2022-02-24 01:12:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 01:12:41,635 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:41,635 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:41,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:12:41,635 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:41,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1585209602, now seen corresponding path program 1 times [2022-02-24 01:12:41,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:41,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489794859] [2022-02-24 01:12:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:41,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:41,638 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:41,639 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:41,639 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:42,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:42,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:12:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:42,228 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:42,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489794859] [2022-02-24 01:12:42,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489794859] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:42,229 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:42,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:12:42,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537913833] [2022-02-24 01:12:42,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:42,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:12:42,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:42,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:12:42,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:12:42,230 INFO L87 Difference]: Start difference. First operand 161 states and 188 transitions. Second operand has 26 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:43,858 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2022-02-24 01:12:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 01:12:43,859 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-02-24 01:12:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:43,860 INFO L225 Difference]: With dead ends: 241 [2022-02-24 01:12:43,860 INFO L226 Difference]: Without dead ends: 239 [2022-02-24 01:12:43,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=585, Invalid=3575, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:12:43,862 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 209 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:43,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 63 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:12:43,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-24 01:12:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 176. [2022-02-24 01:12:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 163 states have (on average 1.1840490797546013) internal successors, (193), 166 states have internal predecessors, (193), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:43,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 206 transitions. [2022-02-24 01:12:43,943 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 206 transitions. Word has length 47 [2022-02-24 01:12:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:43,944 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 206 transitions. [2022-02-24 01:12:43,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 206 transitions. [2022-02-24 01:12:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 01:12:43,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:43,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:43,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:12:43,945 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:43,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1571697014, now seen corresponding path program 3 times [2022-02-24 01:12:43,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:43,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136463394] [2022-02-24 01:12:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:43,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:43,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:43,948 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:43,948 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:44,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:44,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-24 01:12:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:44,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 01:12:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:44,071 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:44,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136463394] [2022-02-24 01:12:44,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [136463394] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:44,071 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:44,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:12:44,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084391010] [2022-02-24 01:12:44,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:44,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:12:44,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:44,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:12:44,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:44,072 INFO L87 Difference]: Start difference. First operand 176 states and 206 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:44,481 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2022-02-24 01:12:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:12:44,482 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2022-02-24 01:12:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:44,482 INFO L225 Difference]: With dead ends: 217 [2022-02-24 01:12:44,483 INFO L226 Difference]: Without dead ends: 172 [2022-02-24 01:12:44,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:12:44,483 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 127 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:44,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 66 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-24 01:12:44,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-02-24 01:12:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.148936170212766) internal successors, (162), 144 states have internal predecessors, (162), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2022-02-24 01:12:44,551 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 49 [2022-02-24 01:12:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:44,552 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2022-02-24 01:12:44,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2022-02-24 01:12:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 01:12:44,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:44,553 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:44,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:12:44,553 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:44,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:44,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1212783309, now seen corresponding path program 6 times [2022-02-24 01:12:44,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:44,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502768775] [2022-02-24 01:12:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:44,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:44,556 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:44,556 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:44,556 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:45,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:45,073 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:45,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502768775] [2022-02-24 01:12:45,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [502768775] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:45,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:45,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:12:45,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315924559] [2022-02-24 01:12:45,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:45,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:12:45,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:45,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:12:45,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:12:45,074 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 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) [2022-02-24 01:12:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:46,728 INFO L93 Difference]: Finished difference Result 259 states and 305 transitions. [2022-02-24 01:12:46,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 01:12:46,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 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 [2022-02-24 01:12:46,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:46,729 INFO L225 Difference]: With dead ends: 259 [2022-02-24 01:12:46,729 INFO L226 Difference]: Without dead ends: 257 [2022-02-24 01:12:46,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=740, Invalid=4230, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:12:46,731 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 297 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:46,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 73 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:12:46,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-24 01:12:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 164. [2022-02-24 01:12:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 155 states have internal predecessors, (177), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2022-02-24 01:12:46,810 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 47 [2022-02-24 01:12:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:46,810 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2022-02-24 01:12:46,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 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) [2022-02-24 01:12:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2022-02-24 01:12:46,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 01:12:46,811 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:46,811 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:46,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:12:46,811 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:46,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:46,812 INFO L85 PathProgramCache]: Analyzing trace with hash -511718731, now seen corresponding path program 6 times [2022-02-24 01:12:46,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:46,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399775891] [2022-02-24 01:12:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:46,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:46,814 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:46,814 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:46,814 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:46,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:46,876 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:46,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399775891] [2022-02-24 01:12:46,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [399775891] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:46,876 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:46,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:12:46,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947037792] [2022-02-24 01:12:46,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:46,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:12:46,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:46,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:12:46,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:12:46,877 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2022-02-24 01:12:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:47,332 INFO L93 Difference]: Finished difference Result 237 states and 284 transitions. [2022-02-24 01:12:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:12:47,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 47 [2022-02-24 01:12:47,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:47,333 INFO L225 Difference]: With dead ends: 237 [2022-02-24 01:12:47,333 INFO L226 Difference]: Without dead ends: 214 [2022-02-24 01:12:47,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:12:47,334 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:47,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 53 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-24 01:12:47,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 170. [2022-02-24 01:12:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.1708860759493671) internal successors, (185), 161 states have internal predecessors, (185), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 197 transitions. [2022-02-24 01:12:47,437 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 197 transitions. Word has length 47 [2022-02-24 01:12:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:47,438 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 197 transitions. [2022-02-24 01:12:47,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2022-02-24 01:12:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 197 transitions. [2022-02-24 01:12:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 01:12:47,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:47,439 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:47,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:12:47,439 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1895537965, now seen corresponding path program 7 times [2022-02-24 01:12:47,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:47,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194750606] [2022-02-24 01:12:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:47,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:47,442 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:47,442 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:47,443 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:48,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:48,093 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:48,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194750606] [2022-02-24 01:12:48,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [194750606] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:48,094 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:48,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:12:48,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363987727] [2022-02-24 01:12:48,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:48,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:12:48,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:48,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:12:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:12:48,095 INFO L87 Difference]: Start difference. First operand 170 states and 197 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 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) [2022-02-24 01:12:49,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:49,435 INFO L93 Difference]: Finished difference Result 262 states and 307 transitions. [2022-02-24 01:12:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:12:49,436 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 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 [2022-02-24 01:12:49,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:49,437 INFO L225 Difference]: With dead ends: 262 [2022-02-24 01:12:49,437 INFO L226 Difference]: Without dead ends: 223 [2022-02-24 01:12:49,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=487, Invalid=2935, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:12:49,439 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 144 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:49,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 83 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:12:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-02-24 01:12:49,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 178. [2022-02-24 01:12:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.1746987951807228) internal successors, (195), 169 states have internal predecessors, (195), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 207 transitions. [2022-02-24 01:12:49,556 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 207 transitions. Word has length 47 [2022-02-24 01:12:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:49,556 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 207 transitions. [2022-02-24 01:12:49,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 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) [2022-02-24 01:12:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 207 transitions. [2022-02-24 01:12:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 01:12:49,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:49,557 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:49,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:12:49,557 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:49,557 INFO L85 PathProgramCache]: Analyzing trace with hash -879512715, now seen corresponding path program 7 times [2022-02-24 01:12:49,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:49,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928082787] [2022-02-24 01:12:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:49,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:49,560 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:49,560 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:49,561 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:49,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:49,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:49,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928082787] [2022-02-24 01:12:49,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928082787] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:49,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:49,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:12:49,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710229700] [2022-02-24 01:12:49,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:49,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:12:49,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:12:49,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:12:49,951 INFO L87 Difference]: Start difference. First operand 178 states and 207 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:50,919 INFO L93 Difference]: Finished difference Result 210 states and 243 transitions. [2022-02-24 01:12:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:12:50,920 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 01:12:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:50,921 INFO L225 Difference]: With dead ends: 210 [2022-02-24 01:12:50,921 INFO L226 Difference]: Without dead ends: 208 [2022-02-24 01:12:50,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:12:50,922 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 130 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:50,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 71 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:50,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-24 01:12:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 169. [2022-02-24 01:12:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 158 states have (on average 1.1708860759493671) internal successors, (185), 160 states have internal predecessors, (185), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:12:50,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 195 transitions. [2022-02-24 01:12:50,997 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 195 transitions. Word has length 47 [2022-02-24 01:12:50,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:50,998 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 195 transitions. [2022-02-24 01:12:50,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:50,998 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 195 transitions. [2022-02-24 01:12:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 01:12:50,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:50,999 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:50,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 01:12:50,999 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:51,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2050746395, now seen corresponding path program 8 times [2022-02-24 01:12:51,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:51,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964383994] [2022-02-24 01:12:51,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:51,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:51,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:51,003 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:51,003 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:51,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:51,535 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:51,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964383994] [2022-02-24 01:12:51,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1964383994] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:51,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:51,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:12:51,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680921458] [2022-02-24 01:12:51,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:51,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:12:51,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:51,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:12:51,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:12:51,536 INFO L87 Difference]: Start difference. First operand 169 states and 195 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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) [2022-02-24 01:12:52,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:52,453 INFO L93 Difference]: Finished difference Result 227 states and 264 transitions. [2022-02-24 01:12:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:12:52,453 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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 [2022-02-24 01:12:52,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:52,454 INFO L225 Difference]: With dead ends: 227 [2022-02-24 01:12:52,455 INFO L226 Difference]: Without dead ends: 225 [2022-02-24 01:12:52,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 01:12:52,456 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 157 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:52,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 78 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:52,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-24 01:12:52,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 181. [2022-02-24 01:12:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 170 states have (on average 1.1823529411764706) internal successors, (201), 172 states have internal predecessors, (201), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:12:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 211 transitions. [2022-02-24 01:12:52,582 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 211 transitions. Word has length 47 [2022-02-24 01:12:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:52,582 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 211 transitions. [2022-02-24 01:12:52,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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) [2022-02-24 01:12:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 211 transitions. [2022-02-24 01:12:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 01:12:52,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:52,583 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:52,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 01:12:52,583 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:52,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:52,584 INFO L85 PathProgramCache]: Analyzing trace with hash 183964909, now seen corresponding path program 4 times [2022-02-24 01:12:52,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:52,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565926714] [2022-02-24 01:12:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:52,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:52,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:52,587 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:52,587 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:52,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:52,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 01:12:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:52,844 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:52,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565926714] [2022-02-24 01:12:52,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1565926714] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:52,845 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:52,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:12:52,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038626433] [2022-02-24 01:12:52,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:52,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:12:52,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:52,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:12:52,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:12:52,846 INFO L87 Difference]: Start difference. First operand 181 states and 211 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:53,537 INFO L93 Difference]: Finished difference Result 221 states and 259 transitions. [2022-02-24 01:12:53,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:12:53,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-24 01:12:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:53,539 INFO L225 Difference]: With dead ends: 221 [2022-02-24 01:12:53,539 INFO L226 Difference]: Without dead ends: 219 [2022-02-24 01:12:53,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:12:53,544 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 128 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:53,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 82 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:53,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-24 01:12:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 204. [2022-02-24 01:12:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 190 states have (on average 1.1842105263157894) internal successors, (225), 193 states have internal predecessors, (225), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 01:12:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 239 transitions. [2022-02-24 01:12:53,651 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 239 transitions. Word has length 49 [2022-02-24 01:12:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:53,651 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 239 transitions. [2022-02-24 01:12:53,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:53,651 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 239 transitions. [2022-02-24 01:12:53,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:12:53,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:53,652 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:53,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 01:12:53,652 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:53,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:53,652 INFO L85 PathProgramCache]: Analyzing trace with hash -42029369, now seen corresponding path program 2 times [2022-02-24 01:12:53,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:53,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601562982] [2022-02-24 01:12:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:53,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:53,655 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:53,655 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:53,655 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:54,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:54,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-24 01:12:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:54,344 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:54,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601562982] [2022-02-24 01:12:54,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601562982] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:54,344 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:54,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:12:54,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589034750] [2022-02-24 01:12:54,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:54,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:12:54,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:54,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:12:54,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:12:54,345 INFO L87 Difference]: Start difference. First operand 204 states and 239 transitions. Second operand has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:55,704 INFO L93 Difference]: Finished difference Result 226 states and 264 transitions. [2022-02-24 01:12:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:12:55,704 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-02-24 01:12:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:55,705 INFO L225 Difference]: With dead ends: 226 [2022-02-24 01:12:55,705 INFO L226 Difference]: Without dead ends: 186 [2022-02-24 01:12:55,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=485, Invalid=3297, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 01:12:55,707 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 128 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:55,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 78 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:12:55,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-24 01:12:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2022-02-24 01:12:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 150 states have (on average 1.2133333333333334) internal successors, (182), 152 states have internal predecessors, (182), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 193 transitions. [2022-02-24 01:12:55,806 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 193 transitions. Word has length 50 [2022-02-24 01:12:55,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:55,806 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 193 transitions. [2022-02-24 01:12:55,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:55,807 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 193 transitions. [2022-02-24 01:12:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:12:55,807 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:55,807 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:55,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 01:12:55,808 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:55,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1165803103, now seen corresponding path program 8 times [2022-02-24 01:12:55,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:55,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814659295] [2022-02-24 01:12:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:55,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:55,811 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:55,811 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:55,811 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:55,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:55,963 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:55,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814659295] [2022-02-24 01:12:55,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1814659295] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:55,963 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:55,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:12:55,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253087303] [2022-02-24 01:12:55,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:55,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:12:55,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:55,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:12:55,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:12:55,965 INFO L87 Difference]: Start difference. First operand 161 states and 193 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:56,585 INFO L93 Difference]: Finished difference Result 394 states and 481 transitions. [2022-02-24 01:12:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:12:56,586 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:12:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:56,588 INFO L225 Difference]: With dead ends: 394 [2022-02-24 01:12:56,588 INFO L226 Difference]: Without dead ends: 323 [2022-02-24 01:12:56,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:12:56,589 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 206 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:56,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 66 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-02-24 01:12:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 230. [2022-02-24 01:12:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 219 states have (on average 1.2054794520547945) internal successors, (264), 221 states have internal predecessors, (264), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2022-02-24 01:12:56,749 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 50 [2022-02-24 01:12:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:56,749 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2022-02-24 01:12:56,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2022-02-24 01:12:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:12:56,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:56,750 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:56,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 01:12:56,750 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:56,750 INFO L85 PathProgramCache]: Analyzing trace with hash 904028532, now seen corresponding path program 9 times [2022-02-24 01:12:56,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:56,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832895260] [2022-02-24 01:12:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:56,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:56,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:56,753 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:56,753 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:57,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:57,089 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:57,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832895260] [2022-02-24 01:12:57,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [832895260] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:57,089 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:57,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:12:57,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554347200] [2022-02-24 01:12:57,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:57,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:12:57,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:57,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:12:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:12:57,090 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:58,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:58,320 INFO L93 Difference]: Finished difference Result 365 states and 439 transitions. [2022-02-24 01:12:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 01:12:58,320 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 01:12:58,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:58,322 INFO L225 Difference]: With dead ends: 365 [2022-02-24 01:12:58,322 INFO L226 Difference]: Without dead ends: 316 [2022-02-24 01:12:58,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=708, Invalid=2832, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 01:12:58,323 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 179 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:58,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 95 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-24 01:12:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 222. [2022-02-24 01:12:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 211 states have (on average 1.1895734597156398) internal successors, (251), 213 states have internal predecessors, (251), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 262 transitions. [2022-02-24 01:12:58,460 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 262 transitions. Word has length 50 [2022-02-24 01:12:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:58,460 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 262 transitions. [2022-02-24 01:12:58,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 262 transitions. [2022-02-24 01:12:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:12:58,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:58,461 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:58,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 01:12:58,461 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:58,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1297158544, now seen corresponding path program 10 times [2022-02-24 01:12:58,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:58,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806476955] [2022-02-24 01:12:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:58,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:58,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:58,465 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:58,465 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:59,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:59,145 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:59,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806476955] [2022-02-24 01:12:59,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806476955] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:59,146 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:59,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:12:59,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062462991] [2022-02-24 01:12:59,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:59,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:12:59,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:59,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:12:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:12:59,147 INFO L87 Difference]: Start difference. First operand 222 states and 262 transitions. Second operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 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) [2022-02-24 01:13:00,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:00,769 INFO L93 Difference]: Finished difference Result 286 states and 334 transitions. [2022-02-24 01:13:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:13:00,770 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 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 [2022-02-24 01:13:00,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:00,771 INFO L225 Difference]: With dead ends: 286 [2022-02-24 01:13:00,771 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 01:13:00,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=431, Invalid=2991, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:13:00,774 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 161 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:00,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 82 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:13:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 01:13:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 222. [2022-02-24 01:13:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 211 states have (on average 1.1943127962085307) internal successors, (252), 213 states have internal predecessors, (252), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:13:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 263 transitions. [2022-02-24 01:13:00,961 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 263 transitions. Word has length 50 [2022-02-24 01:13:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:00,961 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 263 transitions. [2022-02-24 01:13:00,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 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) [2022-02-24 01:13:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 263 transitions. [2022-02-24 01:13:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:13:00,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:00,962 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:00,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 01:13:00,962 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:00,963 INFO L85 PathProgramCache]: Analyzing trace with hash -787548180, now seen corresponding path program 2 times [2022-02-24 01:13:00,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:00,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529417322] [2022-02-24 01:13:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:00,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:00,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:00,966 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:00,966 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:01,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:01,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-24 01:13:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:01,234 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:01,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529417322] [2022-02-24 01:13:01,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1529417322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:01,234 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:01,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:13:01,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177064904] [2022-02-24 01:13:01,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:01,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:13:01,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:13:01,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:13:01,236 INFO L87 Difference]: Start difference. First operand 222 states and 263 transitions. Second operand has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:02,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:02,527 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-02-24 01:13:02,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:13:02,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-24 01:13:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:02,529 INFO L225 Difference]: With dead ends: 325 [2022-02-24 01:13:02,529 INFO L226 Difference]: Without dead ends: 323 [2022-02-24 01:13:02,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:13:02,529 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 176 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:02,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 96 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-02-24 01:13:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 254. [2022-02-24 01:13:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.1924686192468619) internal successors, (285), 243 states have internal predecessors, (285), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 01:13:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 302 transitions. [2022-02-24 01:13:02,709 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 302 transitions. Word has length 52 [2022-02-24 01:13:02,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:02,709 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 302 transitions. [2022-02-24 01:13:02,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:02,710 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 302 transitions. [2022-02-24 01:13:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:13:02,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:02,710 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:02,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 01:13:02,710 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:02,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:02,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1609585614, now seen corresponding path program 3 times [2022-02-24 01:13:02,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:02,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802326788] [2022-02-24 01:13:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:02,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:02,713 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:02,713 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:02,713 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:03,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:03,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-24 01:13:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:03,128 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:03,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802326788] [2022-02-24 01:13:03,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1802326788] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:03,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:03,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:13:03,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761538959] [2022-02-24 01:13:03,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:03,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:13:03,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:03,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:13:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:13:03,129 INFO L87 Difference]: Start difference. First operand 254 states and 302 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:04,304 INFO L93 Difference]: Finished difference Result 294 states and 348 transitions. [2022-02-24 01:13:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:13:04,305 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-24 01:13:04,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:04,306 INFO L225 Difference]: With dead ends: 294 [2022-02-24 01:13:04,306 INFO L226 Difference]: Without dead ends: 292 [2022-02-24 01:13:04,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:13:04,306 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 111 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:04,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 104 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-24 01:13:04,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2022-02-24 01:13:04,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 236 states have (on average 1.194915254237288) internal successors, (282), 240 states have internal predecessors, (282), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 01:13:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 299 transitions. [2022-02-24 01:13:04,525 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 299 transitions. Word has length 52 [2022-02-24 01:13:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:04,525 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 299 transitions. [2022-02-24 01:13:04,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 299 transitions. [2022-02-24 01:13:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:13:04,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:04,526 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:04,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 01:13:04,527 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:04,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:04,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1574158879, now seen corresponding path program 9 times [2022-02-24 01:13:04,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:04,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813086057] [2022-02-24 01:13:04,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:04,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:04,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:04,530 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:04,530 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:05,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:05,176 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:05,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813086057] [2022-02-24 01:13:05,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [813086057] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:05,176 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:05,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:13:05,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710397267] [2022-02-24 01:13:05,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:05,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:13:05,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:05,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:13:05,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:13:05,177 INFO L87 Difference]: Start difference. First operand 251 states and 299 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:06,216 INFO L93 Difference]: Finished difference Result 340 states and 405 transitions. [2022-02-24 01:13:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:13:06,216 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:13:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:06,217 INFO L225 Difference]: With dead ends: 340 [2022-02-24 01:13:06,218 INFO L226 Difference]: Without dead ends: 338 [2022-02-24 01:13:06,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=451, Invalid=2201, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 01:13:06,218 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 163 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:06,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 51 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-24 01:13:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 286. [2022-02-24 01:13:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 268 states have (on average 1.1902985074626866) internal successors, (319), 274 states have internal predecessors, (319), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 4 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-24 01:13:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 340 transitions. [2022-02-24 01:13:06,486 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 340 transitions. Word has length 52 [2022-02-24 01:13:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:06,487 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 340 transitions. [2022-02-24 01:13:06,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 340 transitions. [2022-02-24 01:13:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:13:06,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:06,488 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:06,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 01:13:06,488 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:06,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:06,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1534105639, now seen corresponding path program 10 times [2022-02-24 01:13:06,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:06,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080033892] [2022-02-24 01:13:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:06,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:06,491 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:06,491 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:06,491 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:07,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:07,108 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:07,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080033892] [2022-02-24 01:13:07,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1080033892] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:07,109 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:07,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:13:07,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798622882] [2022-02-24 01:13:07,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:07,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:13:07,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:07,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:13:07,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:13:07,112 INFO L87 Difference]: Start difference. First operand 286 states and 340 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:08,419 INFO L93 Difference]: Finished difference Result 370 states and 441 transitions. [2022-02-24 01:13:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:13:08,420 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:13:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:08,421 INFO L225 Difference]: With dead ends: 370 [2022-02-24 01:13:08,421 INFO L226 Difference]: Without dead ends: 368 [2022-02-24 01:13:08,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=489, Invalid=2591, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 01:13:08,422 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 210 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:08,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 84 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-02-24 01:13:08,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 311. [2022-02-24 01:13:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 291 states have (on average 1.1924398625429553) internal successors, (347), 298 states have internal predecessors, (347), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-24 01:13:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 370 transitions. [2022-02-24 01:13:08,637 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 370 transitions. Word has length 52 [2022-02-24 01:13:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:08,638 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 370 transitions. [2022-02-24 01:13:08,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 370 transitions. [2022-02-24 01:13:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 01:13:08,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:08,639 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:08,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 01:13:08,639 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:08,640 INFO L85 PathProgramCache]: Analyzing trace with hash 650625165, now seen corresponding path program 4 times [2022-02-24 01:13:08,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:08,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100073193] [2022-02-24 01:13:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:08,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:08,642 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:08,643 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:08,643 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:08,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:08,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 01:13:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:08,835 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:08,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100073193] [2022-02-24 01:13:08,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [100073193] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:08,835 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:08,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:13:08,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695078061] [2022-02-24 01:13:08,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:08,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:13:08,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:08,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:13:08,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:13:08,836 INFO L87 Difference]: Start difference. First operand 311 states and 370 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:10,033 INFO L93 Difference]: Finished difference Result 394 states and 467 transitions. [2022-02-24 01:13:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:13:10,033 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-24 01:13:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:10,034 INFO L225 Difference]: With dead ends: 394 [2022-02-24 01:13:10,034 INFO L226 Difference]: Without dead ends: 392 [2022-02-24 01:13:10,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:13:10,035 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 148 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:10,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 114 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:10,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-24 01:13:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 305. [2022-02-24 01:13:10,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 285 states have (on average 1.1929824561403508) internal successors, (340), 292 states have internal predecessors, (340), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-24 01:13:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 363 transitions. [2022-02-24 01:13:10,255 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 363 transitions. Word has length 55 [2022-02-24 01:13:10,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:10,255 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 363 transitions. [2022-02-24 01:13:10,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:10,259 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 363 transitions. [2022-02-24 01:13:10,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 01:13:10,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:10,260 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:10,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 01:13:10,260 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:10,260 INFO L85 PathProgramCache]: Analyzing trace with hash 555461839, now seen corresponding path program 3 times [2022-02-24 01:13:10,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:10,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72665193] [2022-02-24 01:13:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:10,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:10,263 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:10,263 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:10,264 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:11,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 01:13:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:11,004 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:11,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72665193] [2022-02-24 01:13:11,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [72665193] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:11,004 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:11,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:13:11,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805473117] [2022-02-24 01:13:11,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:11,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:13:11,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:11,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:13:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:13:11,006 INFO L87 Difference]: Start difference. First operand 305 states and 363 transitions. Second operand has 30 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:12,875 INFO L93 Difference]: Finished difference Result 388 states and 459 transitions. [2022-02-24 01:13:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 01:13:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-24 01:13:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:12,877 INFO L225 Difference]: With dead ends: 388 [2022-02-24 01:13:12,877 INFO L226 Difference]: Without dead ends: 386 [2022-02-24 01:13:12,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=712, Invalid=4400, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 01:13:12,878 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 149 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:12,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 113 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:13:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-02-24 01:13:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 332. [2022-02-24 01:13:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 312 states have (on average 1.1923076923076923) internal successors, (372), 319 states have internal predecessors, (372), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-24 01:13:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 395 transitions. [2022-02-24 01:13:13,116 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 395 transitions. Word has length 55 [2022-02-24 01:13:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:13,117 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 395 transitions. [2022-02-24 01:13:13,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 395 transitions. [2022-02-24 01:13:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 01:13:13,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:13,118 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:13,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 01:13:13,118 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:13,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1147005369, now seen corresponding path program 5 times [2022-02-24 01:13:13,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:13,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788480308] [2022-02-24 01:13:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:13,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:13,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:13,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:13,122 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:13,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:13,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 01:13:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:13,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 01:13:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:13,469 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:13,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788480308] [2022-02-24 01:13:13,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [788480308] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:13,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:13,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:13:13,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314627222] [2022-02-24 01:13:13,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:13,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:13:13,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:13,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:13:13,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:13:13,470 INFO L87 Difference]: Start difference. First operand 332 states and 395 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:14,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:14,400 INFO L93 Difference]: Finished difference Result 390 states and 462 transitions. [2022-02-24 01:13:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:13:14,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-02-24 01:13:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:14,402 INFO L225 Difference]: With dead ends: 390 [2022-02-24 01:13:14,402 INFO L226 Difference]: Without dead ends: 388 [2022-02-24 01:13:14,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:13:14,402 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 182 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:14,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 52 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:14,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-02-24 01:13:14,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 366. [2022-02-24 01:13:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 339 states have (on average 1.176991150442478) internal successors, (399), 349 states have internal predecessors, (399), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 01:13:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 434 transitions. [2022-02-24 01:13:14,674 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 434 transitions. Word has length 57 [2022-02-24 01:13:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:14,674 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 434 transitions. [2022-02-24 01:13:14,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 434 transitions. [2022-02-24 01:13:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 01:13:14,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:14,676 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:14,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 01:13:14,676 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1946369156, now seen corresponding path program 11 times [2022-02-24 01:13:14,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:14,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064575806] [2022-02-24 01:13:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:14,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:14,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:14,679 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:14,679 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:15,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:15,275 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:15,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064575806] [2022-02-24 01:13:15,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064575806] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:15,275 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:15,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:13:15,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232653702] [2022-02-24 01:13:15,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:15,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:13:15,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:15,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:13:15,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:13:15,276 INFO L87 Difference]: Start difference. First operand 366 states and 434 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:17,021 INFO L93 Difference]: Finished difference Result 498 states and 595 transitions. [2022-02-24 01:13:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 01:13:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 01:13:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:17,023 INFO L225 Difference]: With dead ends: 498 [2022-02-24 01:13:17,023 INFO L226 Difference]: Without dead ends: 496 [2022-02-24 01:13:17,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=3455, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 01:13:17,024 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 211 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:17,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 64 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:13:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-02-24 01:13:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 401. [2022-02-24 01:13:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 372 states have (on average 1.185483870967742) internal successors, (441), 383 states have internal predecessors, (441), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 7 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-24 01:13:17,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 478 transitions. [2022-02-24 01:13:17,322 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 478 transitions. Word has length 55 [2022-02-24 01:13:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:17,322 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 478 transitions. [2022-02-24 01:13:17,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 478 transitions. [2022-02-24 01:13:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 01:13:17,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:17,324 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:17,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 01:13:17,324 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:17,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:17,325 INFO L85 PathProgramCache]: Analyzing trace with hash -426979644, now seen corresponding path program 12 times [2022-02-24 01:13:17,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:17,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480653082] [2022-02-24 01:13:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:17,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:17,327 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:17,328 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:17,328 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:17,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:17,855 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:17,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480653082] [2022-02-24 01:13:17,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1480653082] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:17,855 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:17,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:13:17,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385691794] [2022-02-24 01:13:17,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:17,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:13:17,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:17,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:13:17,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:13:17,856 INFO L87 Difference]: Start difference. First operand 401 states and 478 transitions. Second operand has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:19,868 INFO L93 Difference]: Finished difference Result 510 states and 610 transitions. [2022-02-24 01:13:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 01:13:19,868 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 01:13:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:19,870 INFO L225 Difference]: With dead ends: 510 [2022-02-24 01:13:19,870 INFO L226 Difference]: Without dead ends: 508 [2022-02-24 01:13:19,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=572, Invalid=3460, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 01:13:19,871 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 220 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:19,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 106 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:19,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-02-24 01:13:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 410. [2022-02-24 01:13:20,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 381 states have (on average 1.188976377952756) internal successors, (453), 392 states have internal predecessors, (453), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 7 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-24 01:13:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 490 transitions. [2022-02-24 01:13:20,169 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 490 transitions. Word has length 55 [2022-02-24 01:13:20,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:20,170 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 490 transitions. [2022-02-24 01:13:20,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,170 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 490 transitions. [2022-02-24 01:13:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 01:13:20,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:20,171 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:20,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 01:13:20,172 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:20,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:20,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1046366456, now seen corresponding path program 13 times [2022-02-24 01:13:20,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:20,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369565413] [2022-02-24 01:13:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:20,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:20,175 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:20,175 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:20,176 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:20,776 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:20,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369565413] [2022-02-24 01:13:20,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1369565413] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:20,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:20,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:13:20,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733086443] [2022-02-24 01:13:20,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:20,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:13:20,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:20,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:13:20,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:13:20,778 INFO L87 Difference]: Start difference. First operand 410 states and 490 transitions. Second operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2022-02-24 01:13:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:22,375 INFO L93 Difference]: Finished difference Result 487 states and 582 transitions. [2022-02-24 01:13:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:13:22,375 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 24 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 55 [2022-02-24 01:13:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:22,377 INFO L225 Difference]: With dead ends: 487 [2022-02-24 01:13:22,377 INFO L226 Difference]: Without dead ends: 485 [2022-02-24 01:13:22,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=485, Invalid=2937, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:13:22,377 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 132 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:22,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 106 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-24 01:13:22,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 444. [2022-02-24 01:13:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 412 states have (on average 1.1893203883495145) internal successors, (490), 425 states have internal predecessors, (490), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 7 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-24 01:13:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 531 transitions. [2022-02-24 01:13:22,834 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 531 transitions. Word has length 55 [2022-02-24 01:13:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:22,835 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 531 transitions. [2022-02-24 01:13:22,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2022-02-24 01:13:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 531 transitions. [2022-02-24 01:13:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 01:13:22,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:22,836 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:22,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 01:13:22,836 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash -140336322, now seen corresponding path program 14 times [2022-02-24 01:13:22,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:22,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128214108] [2022-02-24 01:13:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:22,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:22,843 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:22,843 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:22,844 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:23,534 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:23,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128214108] [2022-02-24 01:13:23,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2128214108] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:23,534 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:23,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:13:23,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416297313] [2022-02-24 01:13:23,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:23,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:13:23,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:23,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:13:23,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:13:23,535 INFO L87 Difference]: Start difference. First operand 444 states and 531 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:25,368 INFO L93 Difference]: Finished difference Result 548 states and 655 transitions. [2022-02-24 01:13:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 01:13:25,368 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-24 01:13:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:25,370 INFO L225 Difference]: With dead ends: 548 [2022-02-24 01:13:25,370 INFO L226 Difference]: Without dead ends: 546 [2022-02-24 01:13:25,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=585, Invalid=3705, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 01:13:25,371 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 190 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:25,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 106 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:13:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-02-24 01:13:25,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 441. [2022-02-24 01:13:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 409 states have (on average 1.1882640586797066) internal successors, (486), 422 states have internal predecessors, (486), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 7 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-24 01:13:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 527 transitions. [2022-02-24 01:13:25,690 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 527 transitions. Word has length 55 [2022-02-24 01:13:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:25,690 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 527 transitions. [2022-02-24 01:13:25,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:25,690 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 527 transitions. [2022-02-24 01:13:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:13:25,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:25,692 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:25,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 01:13:25,692 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:25,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:25,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1285024718, now seen corresponding path program 4 times [2022-02-24 01:13:25,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:25,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073284797] [2022-02-24 01:13:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:25,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:25,695 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:25,695 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:25,695 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 01:13:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:26,527 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:26,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073284797] [2022-02-24 01:13:26,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1073284797] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:26,527 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:26,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:13:26,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144433606] [2022-02-24 01:13:26,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:26,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:13:26,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:26,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:13:26,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:13:26,528 INFO L87 Difference]: Start difference. First operand 441 states and 527 transitions. Second operand has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:29,107 INFO L93 Difference]: Finished difference Result 540 states and 645 transitions. [2022-02-24 01:13:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 01:13:29,107 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-24 01:13:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:29,109 INFO L225 Difference]: With dead ends: 540 [2022-02-24 01:13:29,109 INFO L226 Difference]: Without dead ends: 538 [2022-02-24 01:13:29,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2246 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1010, Invalid=6130, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 01:13:29,110 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 265 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:29,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 88 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:29,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-02-24 01:13:29,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 465. [2022-02-24 01:13:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 432 states have (on average 1.1875) internal successors, (513), 446 states have internal predecessors, (513), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 01:13:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 556 transitions. [2022-02-24 01:13:29,545 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 556 transitions. Word has length 58 [2022-02-24 01:13:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:29,545 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 556 transitions. [2022-02-24 01:13:29,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 556 transitions. [2022-02-24 01:13:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:13:29,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:29,546 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:29,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 01:13:29,547 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:29,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1642798748, now seen corresponding path program 5 times [2022-02-24 01:13:29,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:29,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981325812] [2022-02-24 01:13:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:29,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:29,550 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:29,550 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:29,550 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:30,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:30,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 01:13:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:30,363 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:30,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981325812] [2022-02-24 01:13:30,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981325812] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:30,363 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:30,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:13:30,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56153500] [2022-02-24 01:13:30,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:30,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:13:30,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:30,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:13:30,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:13:30,364 INFO L87 Difference]: Start difference. First operand 465 states and 556 transitions. Second operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:32,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:32,381 INFO L93 Difference]: Finished difference Result 565 states and 678 transitions. [2022-02-24 01:13:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:13:32,382 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-24 01:13:32,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:32,383 INFO L225 Difference]: With dead ends: 565 [2022-02-24 01:13:32,383 INFO L226 Difference]: Without dead ends: 563 [2022-02-24 01:13:32,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=459, Invalid=3201, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:13:32,384 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 159 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:32,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 96 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:13:32,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-24 01:13:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 449. [2022-02-24 01:13:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 418 states have (on average 1.19377990430622) internal successors, (499), 431 states have internal predecessors, (499), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-24 01:13:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 538 transitions. [2022-02-24 01:13:32,804 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 538 transitions. Word has length 58 [2022-02-24 01:13:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:32,805 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 538 transitions. [2022-02-24 01:13:32,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 538 transitions. [2022-02-24 01:13:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:13:32,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:32,806 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:32,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 01:13:32,806 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:32,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1797092794, now seen corresponding path program 5 times [2022-02-24 01:13:32,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:32,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785027247] [2022-02-24 01:13:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:32,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:32,810 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:32,810 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:32,810 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:33,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:33,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-24 01:13:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:33,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 01:13:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:33,160 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:33,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785027247] [2022-02-24 01:13:33,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1785027247] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:33,160 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:33,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:13:33,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638196474] [2022-02-24 01:13:33,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:33,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:13:33,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:33,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:13:33,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:13:33,161 INFO L87 Difference]: Start difference. First operand 449 states and 538 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:34,155 INFO L93 Difference]: Finished difference Result 501 states and 600 transitions. [2022-02-24 01:13:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:13:34,156 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2022-02-24 01:13:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:34,157 INFO L225 Difference]: With dead ends: 501 [2022-02-24 01:13:34,157 INFO L226 Difference]: Without dead ends: 499 [2022-02-24 01:13:34,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:13:34,158 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 173 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:34,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 67 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-02-24 01:13:34,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 449. [2022-02-24 01:13:34,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 418 states have (on average 1.1961722488038278) internal successors, (500), 431 states have internal predecessors, (500), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-24 01:13:34,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 539 transitions. [2022-02-24 01:13:34,504 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 539 transitions. Word has length 60 [2022-02-24 01:13:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:34,504 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 539 transitions. [2022-02-24 01:13:34,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 539 transitions. [2022-02-24 01:13:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:13:34,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:34,505 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:34,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 01:13:34,505 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:34,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:34,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1104308479, now seen corresponding path program 15 times [2022-02-24 01:13:34,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:34,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935846472] [2022-02-24 01:13:34,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:34,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:34,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:34,509 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:34,509 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:34,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:34,810 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:34,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935846472] [2022-02-24 01:13:34,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935846472] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:34,810 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:34,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:13:34,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908062320] [2022-02-24 01:13:34,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:34,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:13:34,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:13:34,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:13:34,811 INFO L87 Difference]: Start difference. First operand 449 states and 539 transitions. Second operand has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:36,838 INFO L93 Difference]: Finished difference Result 662 states and 809 transitions. [2022-02-24 01:13:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 01:13:36,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:13:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:36,840 INFO L225 Difference]: With dead ends: 662 [2022-02-24 01:13:36,840 INFO L226 Difference]: Without dead ends: 660 [2022-02-24 01:13:36,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1472, Invalid=4690, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 01:13:36,841 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 263 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:36,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 60 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-02-24 01:13:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 488. [2022-02-24 01:13:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 456 states have (on average 1.206140350877193) internal successors, (550), 469 states have internal predecessors, (550), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-24 01:13:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 589 transitions. [2022-02-24 01:13:37,251 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 589 transitions. Word has length 58 [2022-02-24 01:13:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:37,251 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 589 transitions. [2022-02-24 01:13:37,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:37,251 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 589 transitions. [2022-02-24 01:13:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:13:37,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:37,252 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:37,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 01:13:37,252 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:37,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:37,252 INFO L85 PathProgramCache]: Analyzing trace with hash -403243901, now seen corresponding path program 11 times [2022-02-24 01:13:37,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:37,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298283297] [2022-02-24 01:13:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:37,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:37,255 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:37,255 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:37,255 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:37,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:37,341 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:37,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298283297] [2022-02-24 01:13:37,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1298283297] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:37,341 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:37,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:13:37,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133232781] [2022-02-24 01:13:37,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:37,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:13:37,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:37,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:13:37,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:13:37,342 INFO L87 Difference]: Start difference. First operand 488 states and 589 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-02-24 01:13:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:38,326 INFO L93 Difference]: Finished difference Result 616 states and 753 transitions. [2022-02-24 01:13:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:13:38,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 58 [2022-02-24 01:13:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:38,328 INFO L225 Difference]: With dead ends: 616 [2022-02-24 01:13:38,328 INFO L226 Difference]: Without dead ends: 590 [2022-02-24 01:13:38,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:13:38,328 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 152 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:38,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 70 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-02-24 01:13:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 494. [2022-02-24 01:13:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 462 states have (on average 1.2077922077922079) internal successors, (558), 475 states have internal predecessors, (558), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-24 01:13:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 597 transitions. [2022-02-24 01:13:38,699 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 597 transitions. Word has length 58 [2022-02-24 01:13:38,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:38,699 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 597 transitions. [2022-02-24 01:13:38,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-02-24 01:13:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 597 transitions. [2022-02-24 01:13:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:13:38,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:38,700 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:38,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 01:13:38,700 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1786782527, now seen corresponding path program 16 times [2022-02-24 01:13:38,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:38,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034075352] [2022-02-24 01:13:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:38,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:38,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:38,704 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:38,704 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:39,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:39,516 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:39,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034075352] [2022-02-24 01:13:39,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034075352] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:39,517 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:39,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:13:39,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498561071] [2022-02-24 01:13:39,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:39,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:13:39,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:39,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:13:39,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:13:39,518 INFO L87 Difference]: Start difference. First operand 494 states and 597 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:41,297 INFO L93 Difference]: Finished difference Result 584 states and 701 transitions. [2022-02-24 01:13:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 01:13:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:13:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:41,300 INFO L225 Difference]: With dead ends: 584 [2022-02-24 01:13:41,300 INFO L226 Difference]: Without dead ends: 582 [2022-02-24 01:13:41,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=461, Invalid=3829, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 01:13:41,301 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 228 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:41,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 106 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:41,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-02-24 01:13:41,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 500. [2022-02-24 01:13:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 468 states have (on average 1.2094017094017093) internal successors, (566), 481 states have internal predecessors, (566), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-24 01:13:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 605 transitions. [2022-02-24 01:13:41,672 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 605 transitions. Word has length 58 [2022-02-24 01:13:41,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:41,673 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 605 transitions. [2022-02-24 01:13:41,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 605 transitions. [2022-02-24 01:13:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:13:41,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:41,674 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:41,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 01:13:41,674 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:41,674 INFO L85 PathProgramCache]: Analyzing trace with hash -266865911, now seen corresponding path program 12 times [2022-02-24 01:13:41,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:41,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497650117] [2022-02-24 01:13:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:41,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:41,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:41,677 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:41,677 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:42,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:42,231 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:42,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497650117] [2022-02-24 01:13:42,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1497650117] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:42,231 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:42,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:13:42,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694480180] [2022-02-24 01:13:42,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:42,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:13:42,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:42,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:13:42,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:13:42,232 INFO L87 Difference]: Start difference. First operand 500 states and 605 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:44,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:44,910 INFO L93 Difference]: Finished difference Result 644 states and 774 transitions. [2022-02-24 01:13:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 01:13:44,911 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:13:44,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:44,913 INFO L225 Difference]: With dead ends: 644 [2022-02-24 01:13:44,913 INFO L226 Difference]: Without dead ends: 642 [2022-02-24 01:13:44,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=662, Invalid=4888, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 01:13:44,914 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 350 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:44,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 76 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 2177 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:13:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-02-24 01:13:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 477. [2022-02-24 01:13:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 447 states have (on average 1.2125279642058167) internal successors, (542), 459 states have internal predecessors, (542), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 5 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 01:13:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 577 transitions. [2022-02-24 01:13:45,275 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 577 transitions. Word has length 58 [2022-02-24 01:13:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:45,276 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 577 transitions. [2022-02-24 01:13:45,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 577 transitions. [2022-02-24 01:13:45,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:13:45,277 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:45,277 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:45,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 01:13:45,277 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash 396084749, now seen corresponding path program 17 times [2022-02-24 01:13:45,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:45,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756260836] [2022-02-24 01:13:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:45,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:45,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:45,280 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:45,280 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:45,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:46,001 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:46,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756260836] [2022-02-24 01:13:46,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [756260836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:46,001 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:46,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:13:46,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715948048] [2022-02-24 01:13:46,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:46,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:13:46,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:13:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:13:46,004 INFO L87 Difference]: Start difference. First operand 477 states and 577 transitions. Second operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:48,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:48,017 INFO L93 Difference]: Finished difference Result 612 states and 738 transitions. [2022-02-24 01:13:48,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 01:13:48,017 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:13:48,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:48,019 INFO L225 Difference]: With dead ends: 612 [2022-02-24 01:13:48,020 INFO L226 Difference]: Without dead ends: 610 [2022-02-24 01:13:48,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=606, Invalid=4086, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:13:48,021 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 226 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:48,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 86 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-02-24 01:13:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 477. [2022-02-24 01:13:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 447 states have (on average 1.2125279642058167) internal successors, (542), 459 states have internal predecessors, (542), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 5 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 01:13:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 577 transitions. [2022-02-24 01:13:48,377 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 577 transitions. Word has length 58 [2022-02-24 01:13:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:48,377 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 577 transitions. [2022-02-24 01:13:48,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 577 transitions. [2022-02-24 01:13:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:13:48,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:48,378 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:48,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 01:13:48,379 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash -441878337, now seen corresponding path program 13 times [2022-02-24 01:13:48,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:48,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650033598] [2022-02-24 01:13:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:48,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:48,381 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:48,381 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:48,381 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:49,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:49,113 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:49,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650033598] [2022-02-24 01:13:49,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650033598] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:49,114 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:49,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:13:49,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26128297] [2022-02-24 01:13:49,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:49,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:13:49,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:49,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:13:49,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:13:49,115 INFO L87 Difference]: Start difference. First operand 477 states and 577 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:51,233 INFO L93 Difference]: Finished difference Result 602 states and 724 transitions. [2022-02-24 01:13:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 01:13:51,233 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:13:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:51,235 INFO L225 Difference]: With dead ends: 602 [2022-02-24 01:13:51,235 INFO L226 Difference]: Without dead ends: 600 [2022-02-24 01:13:51,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=540, Invalid=4152, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:13:51,236 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 204 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:51,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 97 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1840 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-02-24 01:13:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 483. [2022-02-24 01:13:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 453 states have (on average 1.2119205298013245) internal successors, (549), 465 states have internal predecessors, (549), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 5 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 01:13:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 584 transitions. [2022-02-24 01:13:51,630 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 584 transitions. Word has length 58 [2022-02-24 01:13:51,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:51,630 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 584 transitions. [2022-02-24 01:13:51,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 584 transitions. [2022-02-24 01:13:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:13:51,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:51,631 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:51,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 01:13:51,631 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:51,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:51,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2022038101, now seen corresponding path program 14 times [2022-02-24 01:13:51,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:51,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647013215] [2022-02-24 01:13:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:51,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:51,634 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:51,634 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:51,634 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:52,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:52,327 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:52,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647013215] [2022-02-24 01:13:52,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [647013215] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:52,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:52,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:13:52,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368472028] [2022-02-24 01:13:52,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:52,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:13:52,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:52,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:13:52,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:13:52,328 INFO L87 Difference]: Start difference. First operand 483 states and 584 transitions. Second operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:54,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:54,628 INFO L93 Difference]: Finished difference Result 640 states and 773 transitions. [2022-02-24 01:13:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 01:13:54,629 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:13:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:54,631 INFO L225 Difference]: With dead ends: 640 [2022-02-24 01:13:54,631 INFO L226 Difference]: Without dead ends: 638 [2022-02-24 01:13:54,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=641, Invalid=4761, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 01:13:54,631 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:54,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 83 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-02-24 01:13:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 483. [2022-02-24 01:13:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 453 states have (on average 1.2119205298013245) internal successors, (549), 465 states have internal predecessors, (549), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 5 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 01:13:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 584 transitions. [2022-02-24 01:13:54,997 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 584 transitions. Word has length 58 [2022-02-24 01:13:54,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:54,997 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 584 transitions. [2022-02-24 01:13:54,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 584 transitions. [2022-02-24 01:13:54,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:13:54,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:54,998 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:54,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 01:13:54,999 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:54,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:54,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1349061435, now seen corresponding path program 6 times [2022-02-24 01:13:54,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:54,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509440880] [2022-02-24 01:13:54,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:55,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:55,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:55,002 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:55,002 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:55,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:55,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 01:13:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:55,394 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:55,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509440880] [2022-02-24 01:13:55,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [509440880] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:55,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:55,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:13:55,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088204977] [2022-02-24 01:13:55,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:55,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:13:55,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:55,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:13:55,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:55,396 INFO L87 Difference]: Start difference. First operand 483 states and 584 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:56,875 INFO L93 Difference]: Finished difference Result 588 states and 710 transitions. [2022-02-24 01:13:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:13:56,876 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-02-24 01:13:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:56,877 INFO L225 Difference]: With dead ends: 588 [2022-02-24 01:13:56,878 INFO L226 Difference]: Without dead ends: 586 [2022-02-24 01:13:56,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=355, Invalid=2401, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:13:56,878 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 187 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:56,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 83 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-02-24 01:13:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 520. [2022-02-24 01:13:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 482 states have (on average 1.2033195020746887) internal successors, (580), 498 states have internal predecessors, (580), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 7 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 01:13:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 627 transitions. [2022-02-24 01:13:57,322 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 627 transitions. Word has length 60 [2022-02-24 01:13:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:57,323 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 627 transitions. [2022-02-24 01:13:57,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 627 transitions. [2022-02-24 01:13:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:13:57,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:57,324 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:57,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 01:13:57,324 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:57,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:57,324 INFO L85 PathProgramCache]: Analyzing trace with hash 527024001, now seen corresponding path program 7 times [2022-02-24 01:13:57,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:57,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981019250] [2022-02-24 01:13:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:57,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:57,326 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:57,326 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:57,326 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:57,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:57,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 01:13:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:57,618 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:57,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981019250] [2022-02-24 01:13:57,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981019250] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:57,618 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:57,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:13:57,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152691000] [2022-02-24 01:13:57,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:57,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:13:57,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:57,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:13:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:13:57,619 INFO L87 Difference]: Start difference. First operand 520 states and 627 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:59,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:59,129 INFO L93 Difference]: Finished difference Result 601 states and 725 transitions. [2022-02-24 01:13:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:13:59,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-02-24 01:13:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:59,131 INFO L225 Difference]: With dead ends: 601 [2022-02-24 01:13:59,132 INFO L226 Difference]: Without dead ends: 599 [2022-02-24 01:13:59,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1999, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 01:13:59,132 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 194 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:59,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 112 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-02-24 01:13:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 534. [2022-02-24 01:13:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 496 states have (on average 1.2076612903225807) internal successors, (599), 512 states have internal predecessors, (599), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 7 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 01:13:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 646 transitions. [2022-02-24 01:13:59,577 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 646 transitions. Word has length 60 [2022-02-24 01:13:59,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:59,577 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 646 transitions. [2022-02-24 01:13:59,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:13:59,577 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 646 transitions. [2022-02-24 01:13:59,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:13:59,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:59,578 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:59,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 01:13:59,578 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:59,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:59,579 INFO L85 PathProgramCache]: Analyzing trace with hash 117942087, now seen corresponding path program 8 times [2022-02-24 01:13:59,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:59,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127951421] [2022-02-24 01:13:59,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:59,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:59,581 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:59,581 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:59,581 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:00,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:00,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 01:14:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:00,144 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:00,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127951421] [2022-02-24 01:14:00,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2127951421] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:00,144 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:00,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:14:00,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931497563] [2022-02-24 01:14:00,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:00,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:14:00,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:00,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:14:00,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:14:00,146 INFO L87 Difference]: Start difference. First operand 534 states and 646 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:02,203 INFO L93 Difference]: Finished difference Result 613 states and 736 transitions. [2022-02-24 01:14:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:14:02,203 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-02-24 01:14:02,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:02,205 INFO L225 Difference]: With dead ends: 613 [2022-02-24 01:14:02,205 INFO L226 Difference]: Without dead ends: 611 [2022-02-24 01:14:02,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=465, Invalid=3825, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 01:14:02,206 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 207 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:02,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 133 Invalid, 2078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:14:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-24 01:14:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 527. [2022-02-24 01:14:02,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 492 states have (on average 1.2134146341463414) internal successors, (597), 506 states have internal predecessors, (597), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-24 01:14:02,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 640 transitions. [2022-02-24 01:14:02,646 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 640 transitions. Word has length 60 [2022-02-24 01:14:02,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:02,646 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 640 transitions. [2022-02-24 01:14:02,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:02,646 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 640 transitions. [2022-02-24 01:14:02,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 01:14:02,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:02,647 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:02,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 01:14:02,647 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:02,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash 470069801, now seen corresponding path program 6 times [2022-02-24 01:14:02,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:02,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489129063] [2022-02-24 01:14:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:02,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:02,649 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:02,650 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:02,650 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:03,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:03,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-24 01:14:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:03,469 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:03,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489129063] [2022-02-24 01:14:03,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [489129063] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:03,470 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:03,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:14:03,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440473159] [2022-02-24 01:14:03,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:03,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:14:03,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:03,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:14:03,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:14:03,471 INFO L87 Difference]: Start difference. First operand 527 states and 640 transitions. Second operand has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:05,825 INFO L93 Difference]: Finished difference Result 649 states and 782 transitions. [2022-02-24 01:14:05,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 01:14:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-24 01:14:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:05,828 INFO L225 Difference]: With dead ends: 649 [2022-02-24 01:14:05,828 INFO L226 Difference]: Without dead ends: 647 [2022-02-24 01:14:05,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=606, Invalid=4650, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 01:14:05,829 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 211 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:05,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 116 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:14:05,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-02-24 01:14:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 555. [2022-02-24 01:14:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 518 states have (on average 1.2084942084942085) internal successors, (626), 533 states have internal predecessors, (626), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 7 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-24 01:14:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 671 transitions. [2022-02-24 01:14:06,306 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 671 transitions. Word has length 61 [2022-02-24 01:14:06,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:06,306 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 671 transitions. [2022-02-24 01:14:06,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:06,306 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 671 transitions. [2022-02-24 01:14:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 01:14:06,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:06,307 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:06,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 01:14:06,308 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:06,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1495534305, now seen corresponding path program 7 times [2022-02-24 01:14:06,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:06,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643250706] [2022-02-24 01:14:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:06,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:06,311 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:06,311 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:06,311 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:07,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:07,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-24 01:14:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:07,034 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:07,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643250706] [2022-02-24 01:14:07,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1643250706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:07,034 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:07,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:14:07,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463811261] [2022-02-24 01:14:07,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:07,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:14:07,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:07,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:14:07,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:14:07,035 INFO L87 Difference]: Start difference. First operand 555 states and 671 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:09,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:09,684 INFO L93 Difference]: Finished difference Result 695 states and 836 transitions. [2022-02-24 01:14:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 01:14:09,685 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-24 01:14:09,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:09,686 INFO L225 Difference]: With dead ends: 695 [2022-02-24 01:14:09,687 INFO L226 Difference]: Without dead ends: 693 [2022-02-24 01:14:09,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=634, Invalid=5066, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 01:14:09,687 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 200 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:09,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 104 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2042 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:14:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-02-24 01:14:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 549. [2022-02-24 01:14:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 512 states have (on average 1.208984375) internal successors, (619), 527 states have internal predecessors, (619), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 7 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-24 01:14:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 664 transitions. [2022-02-24 01:14:10,144 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 664 transitions. Word has length 61 [2022-02-24 01:14:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:10,144 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 664 transitions. [2022-02-24 01:14:10,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 664 transitions. [2022-02-24 01:14:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:14:10,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:10,145 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:10,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 01:14:10,145 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:10,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1750933991, now seen corresponding path program 9 times [2022-02-24 01:14:10,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:10,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382350338] [2022-02-24 01:14:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:10,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:10,148 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:10,148 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:10,148 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:10,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:10,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-24 01:14:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:10,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 01:14:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:10,631 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:10,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382350338] [2022-02-24 01:14:10,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [382350338] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:10,631 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:10,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:14:10,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747768390] [2022-02-24 01:14:10,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:10,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:14:10,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:10,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:14:10,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:14:10,632 INFO L87 Difference]: Start difference. First operand 549 states and 664 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:12,193 INFO L93 Difference]: Finished difference Result 641 states and 773 transitions. [2022-02-24 01:14:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:14:12,193 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63 [2022-02-24 01:14:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:12,195 INFO L225 Difference]: With dead ends: 641 [2022-02-24 01:14:12,195 INFO L226 Difference]: Without dead ends: 639 [2022-02-24 01:14:12,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=2430, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:14:12,196 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 204 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:12,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 86 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:14:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-02-24 01:14:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 575. [2022-02-24 01:14:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 537 states have (on average 1.2085661080074488) internal successors, (649), 552 states have internal predecessors, (649), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 8 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 01:14:12,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 696 transitions. [2022-02-24 01:14:12,688 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 696 transitions. Word has length 63 [2022-02-24 01:14:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:12,689 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 696 transitions. [2022-02-24 01:14:12,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 696 transitions. [2022-02-24 01:14:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 01:14:12,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:12,690 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:12,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 01:14:12,690 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:12,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:12,690 INFO L85 PathProgramCache]: Analyzing trace with hash -184264233, now seen corresponding path program 18 times [2022-02-24 01:14:12,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:12,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348189736] [2022-02-24 01:14:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:12,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:12,693 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:12,693 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:12,693 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:12,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:12,861 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:12,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348189736] [2022-02-24 01:14:12,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1348189736] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:12,861 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:12,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:14:12,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562554463] [2022-02-24 01:14:12,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:12,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:14:12,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:12,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:14:12,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:14:12,862 INFO L87 Difference]: Start difference. First operand 575 states and 696 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2022-02-24 01:14:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:14,418 INFO L93 Difference]: Finished difference Result 1162 states and 1436 transitions. [2022-02-24 01:14:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:14:14,418 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 61 [2022-02-24 01:14:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:14,421 INFO L225 Difference]: With dead ends: 1162 [2022-02-24 01:14:14,421 INFO L226 Difference]: Without dead ends: 993 [2022-02-24 01:14:14,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:14:14,422 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 367 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:14,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 108 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:14:14,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-02-24 01:14:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 792. [2022-02-24 01:14:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 754 states have (on average 1.2188328912466844) internal successors, (919), 769 states have internal predecessors, (919), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 8 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 01:14:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 966 transitions. [2022-02-24 01:14:15,096 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 966 transitions. Word has length 61 [2022-02-24 01:14:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:15,096 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 966 transitions. [2022-02-24 01:14:15,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2022-02-24 01:14:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 966 transitions. [2022-02-24 01:14:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 01:14:15,103 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:15,103 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:15,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 01:14:15,103 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:15,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1632684826, now seen corresponding path program 15 times [2022-02-24 01:14:15,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:15,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564948946] [2022-02-24 01:14:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:15,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:15,107 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:15,107 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:15,107 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:15,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:15,469 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:15,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564948946] [2022-02-24 01:14:15,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [564948946] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:15,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:15,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:14:15,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266817856] [2022-02-24 01:14:15,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:15,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:14:15,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:15,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:14:15,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:14:15,470 INFO L87 Difference]: Start difference. First operand 792 states and 966 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:17,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:17,923 INFO L93 Difference]: Finished difference Result 1058 states and 1292 transitions. [2022-02-24 01:14:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 01:14:17,923 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-24 01:14:17,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:17,926 INFO L225 Difference]: With dead ends: 1058 [2022-02-24 01:14:17,926 INFO L226 Difference]: Without dead ends: 1006 [2022-02-24 01:14:17,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1201, Invalid=4499, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 01:14:17,927 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 290 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:17,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 96 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:14:17,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-02-24 01:14:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 805. [2022-02-24 01:14:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 768 states have (on average 1.2135416666666667) internal successors, (932), 782 states have internal predecessors, (932), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-24 01:14:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 977 transitions. [2022-02-24 01:14:18,633 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 977 transitions. Word has length 61 [2022-02-24 01:14:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:18,633 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 977 transitions. [2022-02-24 01:14:18,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 977 transitions. [2022-02-24 01:14:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 01:14:18,635 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:18,635 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:18,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 01:14:18,635 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:18,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1542934108, now seen corresponding path program 19 times [2022-02-24 01:14:18,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:18,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527906511] [2022-02-24 01:14:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:18,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:18,639 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:18,639 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:18,639 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:19,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:19,505 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:19,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527906511] [2022-02-24 01:14:19,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [527906511] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:19,505 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:19,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:14:19,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691494941] [2022-02-24 01:14:19,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:19,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:14:19,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:19,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:14:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:14:19,506 INFO L87 Difference]: Start difference. First operand 805 states and 977 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:22,848 INFO L93 Difference]: Finished difference Result 993 states and 1202 transitions. [2022-02-24 01:14:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 01:14:22,849 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-24 01:14:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:22,851 INFO L225 Difference]: With dead ends: 993 [2022-02-24 01:14:22,851 INFO L226 Difference]: Without dead ends: 991 [2022-02-24 01:14:22,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=759, Invalid=5883, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 01:14:22,852 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 312 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:22,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 106 Invalid, 2742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2537 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:14:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-02-24 01:14:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 820. [2022-02-24 01:14:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 783 states have (on average 1.2158365261813537) internal successors, (952), 797 states have internal predecessors, (952), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-24 01:14:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 997 transitions. [2022-02-24 01:14:23,548 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 997 transitions. Word has length 61 [2022-02-24 01:14:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:23,548 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 997 transitions. [2022-02-24 01:14:23,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 997 transitions. [2022-02-24 01:14:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 01:14:23,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:23,550 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:23,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 01:14:23,550 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:23,550 INFO L85 PathProgramCache]: Analyzing trace with hash 747738716, now seen corresponding path program 16 times [2022-02-24 01:14:23,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:23,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230901407] [2022-02-24 01:14:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:23,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:23,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:23,553 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:23,553 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:24,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:24,135 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:24,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230901407] [2022-02-24 01:14:24,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230901407] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:24,135 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:24,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:14:24,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962888724] [2022-02-24 01:14:24,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:24,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:14:24,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:24,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:14:24,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:14:24,136 INFO L87 Difference]: Start difference. First operand 820 states and 997 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:26,360 INFO L93 Difference]: Finished difference Result 941 states and 1138 transitions. [2022-02-24 01:14:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:14:26,361 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-24 01:14:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:26,363 INFO L225 Difference]: With dead ends: 941 [2022-02-24 01:14:26,363 INFO L226 Difference]: Without dead ends: 939 [2022-02-24 01:14:26,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=375, Invalid=2817, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:14:26,364 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 195 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:26,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 88 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:14:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-02-24 01:14:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 826. [2022-02-24 01:14:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 789 states have (on average 1.2167300380228137) internal successors, (960), 803 states have internal predecessors, (960), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-24 01:14:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1005 transitions. [2022-02-24 01:14:27,063 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1005 transitions. Word has length 61 [2022-02-24 01:14:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:27,064 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1005 transitions. [2022-02-24 01:14:27,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1005 transitions. [2022-02-24 01:14:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 01:14:27,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:27,065 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:27,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 01:14:27,066 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:27,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1042853094, now seen corresponding path program 17 times [2022-02-24 01:14:27,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:27,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565053722] [2022-02-24 01:14:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:27,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:27,068 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:27,068 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:27,068 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:27,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:27,717 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:27,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565053722] [2022-02-24 01:14:27,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1565053722] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:27,717 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:27,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:14:27,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925524594] [2022-02-24 01:14:27,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:27,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:14:27,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:27,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:14:27,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:14:27,718 INFO L87 Difference]: Start difference. First operand 826 states and 1005 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:30,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:30,732 INFO L93 Difference]: Finished difference Result 1003 states and 1212 transitions. [2022-02-24 01:14:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 01:14:30,733 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-24 01:14:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:30,736 INFO L225 Difference]: With dead ends: 1003 [2022-02-24 01:14:30,736 INFO L226 Difference]: Without dead ends: 1001 [2022-02-24 01:14:30,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=622, Invalid=4780, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 01:14:30,737 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 199 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 2014 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:30,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 76 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2014 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:14:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-02-24 01:14:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 759. [2022-02-24 01:14:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 727 states have (on average 1.2173314993122422) internal successors, (885), 737 states have internal predecessors, (885), 19 states have call successors, (19), 13 states have call predecessors, (19), 12 states have return successors, (18), 8 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-24 01:14:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 922 transitions. [2022-02-24 01:14:31,390 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 922 transitions. Word has length 61 [2022-02-24 01:14:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:31,390 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 922 transitions. [2022-02-24 01:14:31,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 922 transitions. [2022-02-24 01:14:31,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 01:14:31,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:31,391 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:31,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 01:14:31,392 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:31,392 INFO L85 PathProgramCache]: Analyzing trace with hash -171237983, now seen corresponding path program 6 times [2022-02-24 01:14:31,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:31,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317797525] [2022-02-24 01:14:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:31,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:31,394 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:31,394 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:31,395 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:31,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:31,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-24 01:14:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:31,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 01:14:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:31,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 01:14:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:31,545 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:31,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317797525] [2022-02-24 01:14:31,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [317797525] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:31,546 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:31,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:14:31,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633573831] [2022-02-24 01:14:31,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:31,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:14:31,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:31,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:14:31,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:14:31,547 INFO L87 Difference]: Start difference. First operand 759 states and 922 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:14:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:32,794 INFO L93 Difference]: Finished difference Result 821 states and 995 transitions. [2022-02-24 01:14:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:14:32,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2022-02-24 01:14:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:32,796 INFO L225 Difference]: With dead ends: 821 [2022-02-24 01:14:32,796 INFO L226 Difference]: Without dead ends: 752 [2022-02-24 01:14:32,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:14:32,797 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 205 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:32,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 54 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:14:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-02-24 01:14:33,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 728. [2022-02-24 01:14:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 699 states have (on average 1.184549356223176) internal successors, (828), 709 states have internal predecessors, (828), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 9 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-24 01:14:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 866 transitions. [2022-02-24 01:14:33,446 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 866 transitions. Word has length 65 [2022-02-24 01:14:33,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:33,446 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 866 transitions. [2022-02-24 01:14:33,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:14:33,446 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 866 transitions. [2022-02-24 01:14:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:14:33,448 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:33,448 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:33,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 01:14:33,448 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:33,448 INFO L85 PathProgramCache]: Analyzing trace with hash 972338910, now seen corresponding path program 10 times [2022-02-24 01:14:33,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:33,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882171464] [2022-02-24 01:14:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:33,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:33,452 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:33,452 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:33,452 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:33,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:33,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 01:14:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:33,762 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:33,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882171464] [2022-02-24 01:14:33,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [882171464] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:33,763 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:33,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:14:33,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973557270] [2022-02-24 01:14:33,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:33,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:14:33,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:33,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:14:33,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:14:33,764 INFO L87 Difference]: Start difference. First operand 728 states and 866 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:36,425 INFO L93 Difference]: Finished difference Result 964 states and 1156 transitions. [2022-02-24 01:14:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 01:14:36,426 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-24 01:14:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:36,429 INFO L225 Difference]: With dead ends: 964 [2022-02-24 01:14:36,429 INFO L226 Difference]: Without dead ends: 962 [2022-02-24 01:14:36,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=535, Invalid=5015, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 01:14:36,430 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 253 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:36,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 128 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:14:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-02-24 01:14:37,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 781. [2022-02-24 01:14:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 746 states have (on average 1.1863270777479893) internal successors, (885), 760 states have internal predecessors, (885), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 10 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 01:14:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 933 transitions. [2022-02-24 01:14:37,204 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 933 transitions. Word has length 63 [2022-02-24 01:14:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:37,204 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 933 transitions. [2022-02-24 01:14:37,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:37,204 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 933 transitions. [2022-02-24 01:14:37,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:14:37,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:37,206 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:37,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 01:14:37,206 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:37,206 INFO L85 PathProgramCache]: Analyzing trace with hash 736626974, now seen corresponding path program 11 times [2022-02-24 01:14:37,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:37,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835979443] [2022-02-24 01:14:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:37,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:37,210 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:37,210 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:37,210 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:37,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:37,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 01:14:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:37,574 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:37,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835979443] [2022-02-24 01:14:37,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1835979443] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:37,574 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:37,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:14:37,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659996778] [2022-02-24 01:14:37,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:37,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:14:37,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:37,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:14:37,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:14:37,575 INFO L87 Difference]: Start difference. First operand 781 states and 933 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:39,478 INFO L93 Difference]: Finished difference Result 838 states and 996 transitions. [2022-02-24 01:14:39,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:14:39,478 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-24 01:14:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:39,481 INFO L225 Difference]: With dead ends: 838 [2022-02-24 01:14:39,481 INFO L226 Difference]: Without dead ends: 836 [2022-02-24 01:14:39,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:14:39,482 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 153 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:39,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 128 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:14:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-02-24 01:14:40,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 794. [2022-02-24 01:14:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 758 states have (on average 1.187335092348285) internal successors, (900), 772 states have internal predecessors, (900), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 10 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 01:14:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 948 transitions. [2022-02-24 01:14:40,265 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 948 transitions. Word has length 63 [2022-02-24 01:14:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:40,266 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 948 transitions. [2022-02-24 01:14:40,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 948 transitions. [2022-02-24 01:14:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:14:40,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:40,268 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:40,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 01:14:40,268 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:40,268 INFO L85 PathProgramCache]: Analyzing trace with hash -578416814, now seen corresponding path program 12 times [2022-02-24 01:14:40,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:40,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766730935] [2022-02-24 01:14:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:40,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:40,271 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:40,271 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:40,271 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:40,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:40,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 01:14:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:40,680 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:40,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766730935] [2022-02-24 01:14:40,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [766730935] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:40,680 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:40,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:14:40,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54458488] [2022-02-24 01:14:40,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:40,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:14:40,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:40,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:14:40,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:14:40,681 INFO L87 Difference]: Start difference. First operand 794 states and 948 transitions. Second operand has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:42,498 INFO L93 Difference]: Finished difference Result 853 states and 1016 transitions. [2022-02-24 01:14:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:14:42,499 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-24 01:14:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:42,501 INFO L225 Difference]: With dead ends: 853 [2022-02-24 01:14:42,501 INFO L226 Difference]: Without dead ends: 851 [2022-02-24 01:14:42,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:14:42,502 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 121 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:42,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 121 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:14:42,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-02-24 01:14:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 779. [2022-02-24 01:14:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 743 states have (on average 1.187079407806191) internal successors, (882), 757 states have internal predecessors, (882), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 10 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 01:14:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 930 transitions. [2022-02-24 01:14:43,317 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 930 transitions. Word has length 63 [2022-02-24 01:14:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:43,317 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 930 transitions. [2022-02-24 01:14:43,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 930 transitions. [2022-02-24 01:14:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:14:43,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:43,319 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:43,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 01:14:43,319 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:43,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1107936288, now seen corresponding path program 8 times [2022-02-24 01:14:43,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:43,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698125225] [2022-02-24 01:14:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:43,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:43,321 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:43,321 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:43,322 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:44,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:44,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 01:14:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:44,173 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:44,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698125225] [2022-02-24 01:14:44,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [698125225] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:44,173 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:44,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:14:44,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656235823] [2022-02-24 01:14:44,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:44,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:14:44,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:14:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:14:44,174 INFO L87 Difference]: Start difference. First operand 779 states and 930 transitions. Second operand has 37 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:47,700 INFO L93 Difference]: Finished difference Result 895 states and 1064 transitions. [2022-02-24 01:14:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 01:14:47,700 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-24 01:14:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:47,707 INFO L225 Difference]: With dead ends: 895 [2022-02-24 01:14:47,707 INFO L226 Difference]: Without dead ends: 893 [2022-02-24 01:14:47,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2643 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=903, Invalid=7653, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 01:14:47,708 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 269 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:47,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 106 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:14:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-02-24 01:14:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 779. [2022-02-24 01:14:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 743 states have (on average 1.187079407806191) internal successors, (882), 757 states have internal predecessors, (882), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 10 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 01:14:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 930 transitions. [2022-02-24 01:14:48,471 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 930 transitions. Word has length 63 [2022-02-24 01:14:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:48,472 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 930 transitions. [2022-02-24 01:14:48,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 930 transitions. [2022-02-24 01:14:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:14:48,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:48,473 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:48,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 01:14:48,473 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:48,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:48,473 INFO L85 PathProgramCache]: Analyzing trace with hash -645721556, now seen corresponding path program 9 times [2022-02-24 01:14:48,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:48,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989828981] [2022-02-24 01:14:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:48,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:48,476 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:48,476 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:48,476 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-24 01:14:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:49,147 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:49,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989828981] [2022-02-24 01:14:49,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1989828981] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:49,147 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:49,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:14:49,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310844604] [2022-02-24 01:14:49,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:49,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:14:49,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:49,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:14:49,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:14:49,148 INFO L87 Difference]: Start difference. First operand 779 states and 930 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:51,754 INFO L93 Difference]: Finished difference Result 817 states and 973 transitions. [2022-02-24 01:14:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 01:14:51,754 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-24 01:14:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:51,757 INFO L225 Difference]: With dead ends: 817 [2022-02-24 01:14:51,757 INFO L226 Difference]: Without dead ends: 815 [2022-02-24 01:14:51,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=647, Invalid=3643, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 01:14:51,758 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 203 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:51,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 134 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:14:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-02-24 01:14:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 775. [2022-02-24 01:14:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 740 states have (on average 1.1878378378378378) internal successors, (879), 754 states have internal predecessors, (879), 24 states have call successors, (24), 11 states have call predecessors, (24), 10 states have return successors, (22), 9 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-24 01:14:52,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 925 transitions. [2022-02-24 01:14:52,528 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 925 transitions. Word has length 64 [2022-02-24 01:14:52,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:52,528 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 925 transitions. [2022-02-24 01:14:52,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:14:52,529 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 925 transitions. [2022-02-24 01:14:52,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 01:14:52,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:52,530 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:52,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 01:14:52,530 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:52,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1217741736, now seen corresponding path program 7 times [2022-02-24 01:14:52,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:52,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324737159] [2022-02-24 01:14:52,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:52,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:52,534 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:52,534 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:52,534 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:52,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:52,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 01:14:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:52,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 01:14:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:52,947 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:52,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324737159] [2022-02-24 01:14:52,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1324737159] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:52,947 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:52,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:14:52,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229636670] [2022-02-24 01:14:52,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:52,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:14:52,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:52,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:14:52,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:14:52,948 INFO L87 Difference]: Start difference. First operand 775 states and 925 transitions. Second operand has 22 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:54,550 INFO L93 Difference]: Finished difference Result 856 states and 1023 transitions. [2022-02-24 01:14:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:14:54,551 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2022-02-24 01:14:54,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:54,553 INFO L225 Difference]: With dead ends: 856 [2022-02-24 01:14:54,553 INFO L226 Difference]: Without dead ends: 854 [2022-02-24 01:14:54,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1635, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 01:14:54,554 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 151 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:54,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 94 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:14:54,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-02-24 01:14:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 818. [2022-02-24 01:14:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 776 states have (on average 1.184278350515464) internal successors, (919), 793 states have internal predecessors, (919), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (28), 12 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-24 01:14:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 977 transitions. [2022-02-24 01:14:55,376 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 977 transitions. Word has length 65 [2022-02-24 01:14:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:55,376 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 977 transitions. [2022-02-24 01:14:55,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:14:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 977 transitions. [2022-02-24 01:14:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:14:55,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:55,377 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:55,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 01:14:55,377 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:55,378 INFO L85 PathProgramCache]: Analyzing trace with hash 775255317, now seen corresponding path program 20 times [2022-02-24 01:14:55,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:55,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933702002] [2022-02-24 01:14:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:55,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:55,380 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:55,380 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:55,380 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:56,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:56,098 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:56,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933702002] [2022-02-24 01:14:56,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1933702002] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:56,098 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:56,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:14:56,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708296671] [2022-02-24 01:14:56,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:56,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:14:56,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:56,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:14:56,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:14:56,099 INFO L87 Difference]: Start difference. First operand 818 states and 977 transitions. Second operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:59,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:59,145 INFO L93 Difference]: Finished difference Result 1102 states and 1324 transitions. [2022-02-24 01:14:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 01:14:59,146 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-24 01:14:59,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:59,148 INFO L225 Difference]: With dead ends: 1102 [2022-02-24 01:14:59,148 INFO L226 Difference]: Without dead ends: 1100 [2022-02-24 01:14:59,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=632, Invalid=4480, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 01:14:59,149 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 379 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2226 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:59,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 105 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2226 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:14:59,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-02-24 01:15:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 878. [2022-02-24 01:15:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 832 states have (on average 1.1875) internal successors, (988), 851 states have internal predecessors, (988), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (30), 12 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-24 01:15:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1050 transitions. [2022-02-24 01:15:00,037 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1050 transitions. Word has length 63 [2022-02-24 01:15:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:00,037 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1050 transitions. [2022-02-24 01:15:00,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1050 transitions. [2022-02-24 01:15:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:15:00,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:00,038 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:00,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 01:15:00,039 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:00,039 INFO L85 PathProgramCache]: Analyzing trace with hash -124747383, now seen corresponding path program 21 times [2022-02-24 01:15:00,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:00,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285239556] [2022-02-24 01:15:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:00,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:00,042 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:00,042 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:00,042 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:00,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:00,742 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:00,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285239556] [2022-02-24 01:15:00,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [285239556] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:00,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:00,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:15:00,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777039809] [2022-02-24 01:15:00,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:00,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:15:00,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:00,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:15:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:15:00,743 INFO L87 Difference]: Start difference. First operand 878 states and 1050 transitions. Second operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:03,005 INFO L93 Difference]: Finished difference Result 1020 states and 1217 transitions. [2022-02-24 01:15:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:15:03,005 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-24 01:15:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:03,007 INFO L225 Difference]: With dead ends: 1020 [2022-02-24 01:15:03,007 INFO L226 Difference]: Without dead ends: 1018 [2022-02-24 01:15:03,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=584, Invalid=3198, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 01:15:03,008 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 189 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:03,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 73 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:15:03,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-02-24 01:15:03,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 915. [2022-02-24 01:15:03,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 867 states have (on average 1.1891580161476356) internal successors, (1031), 887 states have internal predecessors, (1031), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 12 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-24 01:15:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1095 transitions. [2022-02-24 01:15:03,944 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1095 transitions. Word has length 63 [2022-02-24 01:15:03,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:03,944 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1095 transitions. [2022-02-24 01:15:03,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:03,944 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1095 transitions. [2022-02-24 01:15:03,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:15:03,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:03,945 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:03,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 01:15:03,945 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:03,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1311450161, now seen corresponding path program 22 times [2022-02-24 01:15:03,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:03,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306985798] [2022-02-24 01:15:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:03,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:03,949 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:03,949 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:04,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:04,893 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:04,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306985798] [2022-02-24 01:15:04,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [306985798] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:04,893 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:04,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:15:04,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573948437] [2022-02-24 01:15:04,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:04,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:15:04,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:04,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:15:04,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:15:04,894 INFO L87 Difference]: Start difference. First operand 915 states and 1095 transitions. Second operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:07,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:07,892 INFO L93 Difference]: Finished difference Result 1189 states and 1426 transitions. [2022-02-24 01:15:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 01:15:07,892 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-24 01:15:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:07,894 INFO L225 Difference]: With dead ends: 1189 [2022-02-24 01:15:07,894 INFO L226 Difference]: Without dead ends: 1187 [2022-02-24 01:15:07,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=610, Invalid=4502, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 01:15:07,895 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 393 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1712 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:07,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 62 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1712 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:15:07,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2022-02-24 01:15:08,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 936. [2022-02-24 01:15:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 888 states have (on average 1.1925675675675675) internal successors, (1059), 908 states have internal predecessors, (1059), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 12 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-24 01:15:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1123 transitions. [2022-02-24 01:15:08,846 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1123 transitions. Word has length 63 [2022-02-24 01:15:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:08,846 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1123 transitions. [2022-02-24 01:15:08,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1123 transitions. [2022-02-24 01:15:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:15:08,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:08,848 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:08,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 01:15:08,848 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash -500007896, now seen corresponding path program 10 times [2022-02-24 01:15:08,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:08,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387866527] [2022-02-24 01:15:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:08,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:08,851 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:08,851 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:08,851 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:09,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:09,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 01:15:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:09,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 01:15:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:09,378 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:09,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387866527] [2022-02-24 01:15:09,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1387866527] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:09,378 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:09,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:15:09,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306900384] [2022-02-24 01:15:09,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:09,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:15:09,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:09,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:15:09,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:15:09,379 INFO L87 Difference]: Start difference. First operand 936 states and 1123 transitions. Second operand has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:15:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:11,648 INFO L93 Difference]: Finished difference Result 1012 states and 1212 transitions. [2022-02-24 01:15:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 01:15:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2022-02-24 01:15:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:11,650 INFO L225 Difference]: With dead ends: 1012 [2022-02-24 01:15:11,650 INFO L226 Difference]: Without dead ends: 952 [2022-02-24 01:15:11,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=498, Invalid=3162, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:15:11,650 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 160 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:11,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 95 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:15:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-02-24 01:15:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 887. [2022-02-24 01:15:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 841 states have (on average 1.1961950059453033) internal successors, (1006), 860 states have internal predecessors, (1006), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (29), 11 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-24 01:15:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1066 transitions. [2022-02-24 01:15:12,647 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1066 transitions. Word has length 66 [2022-02-24 01:15:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:12,647 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1066 transitions. [2022-02-24 01:15:12,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:15:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1066 transitions. [2022-02-24 01:15:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:15:12,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:12,648 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:12,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 01:15:12,648 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:12,649 INFO L85 PathProgramCache]: Analyzing trace with hash -683336596, now seen corresponding path program 13 times [2022-02-24 01:15:12,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:12,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753862157] [2022-02-24 01:15:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:12,651 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:12,651 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:12,651 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:13,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:13,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-24 01:15:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:13,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 01:15:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:13,329 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:13,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753862157] [2022-02-24 01:15:13,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753862157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:13,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:13,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:15:13,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523418990] [2022-02-24 01:15:13,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:13,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:15:13,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:13,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:15:13,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:15:13,330 INFO L87 Difference]: Start difference. First operand 887 states and 1066 transitions. Second operand has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:15:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:16,277 INFO L93 Difference]: Finished difference Result 939 states and 1125 transitions. [2022-02-24 01:15:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 01:15:16,277 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2022-02-24 01:15:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:16,279 INFO L225 Difference]: With dead ends: 939 [2022-02-24 01:15:16,279 INFO L226 Difference]: Without dead ends: 890 [2022-02-24 01:15:16,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=794, Invalid=4318, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 01:15:16,280 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 236 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:16,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 77 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:15:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-02-24 01:15:17,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 841. [2022-02-24 01:15:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 797 states have (on average 1.1982434127979924) internal successors, (955), 815 states have internal predecessors, (955), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 10 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-24 01:15:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1011 transitions. [2022-02-24 01:15:17,118 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1011 transitions. Word has length 66 [2022-02-24 01:15:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:17,119 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1011 transitions. [2022-02-24 01:15:17,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:15:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1011 transitions. [2022-02-24 01:15:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:15:17,120 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:17,120 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:17,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 01:15:17,120 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:17,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1145647575, now seen corresponding path program 18 times [2022-02-24 01:15:17,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:17,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496531247] [2022-02-24 01:15:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:17,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:17,123 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:17,123 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:17,123 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:17,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:17,717 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:17,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496531247] [2022-02-24 01:15:17,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [496531247] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:17,717 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:17,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:15:17,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025282641] [2022-02-24 01:15:17,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:17,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:15:17,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:17,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:15:17,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:15:17,718 INFO L87 Difference]: Start difference. First operand 841 states and 1011 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:20,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:20,617 INFO L93 Difference]: Finished difference Result 952 states and 1139 transitions. [2022-02-24 01:15:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-24 01:15:20,617 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:15:20,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:20,619 INFO L225 Difference]: With dead ends: 952 [2022-02-24 01:15:20,619 INFO L226 Difference]: Without dead ends: 950 [2022-02-24 01:15:20,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=666, Invalid=5340, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 01:15:20,620 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 236 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:20,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 105 Invalid, 2251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2085 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:15:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-02-24 01:15:21,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 829. [2022-02-24 01:15:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 787 states have (on average 1.1994917407878019) internal successors, (944), 803 states have internal predecessors, (944), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 10 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-24 01:15:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 996 transitions. [2022-02-24 01:15:21,476 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 996 transitions. Word has length 64 [2022-02-24 01:15:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:21,476 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 996 transitions. [2022-02-24 01:15:21,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:21,476 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 996 transitions. [2022-02-24 01:15:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:15:21,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:21,477 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:21,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 01:15:21,477 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:21,477 INFO L85 PathProgramCache]: Analyzing trace with hash 781141083, now seen corresponding path program 14 times [2022-02-24 01:15:21,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:21,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504734708] [2022-02-24 01:15:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:21,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:21,480 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:21,480 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:21,480 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:21,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:21,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 01:15:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:21,713 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:21,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504734708] [2022-02-24 01:15:21,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [504734708] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:21,713 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:21,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:15:21,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327667989] [2022-02-24 01:15:21,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:21,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:15:21,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:21,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:15:21,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:15:21,714 INFO L87 Difference]: Start difference. First operand 829 states and 996 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:15:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:24,903 INFO L93 Difference]: Finished difference Result 1055 states and 1267 transitions. [2022-02-24 01:15:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 01:15:24,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-24 01:15:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:24,905 INFO L225 Difference]: With dead ends: 1055 [2022-02-24 01:15:24,905 INFO L226 Difference]: Without dead ends: 1053 [2022-02-24 01:15:24,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=471, Invalid=4785, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 01:15:24,906 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 232 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:24,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 144 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:15:24,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-02-24 01:15:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 847. [2022-02-24 01:15:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 803 states have (on average 1.1980074719800746) internal successors, (962), 821 states have internal predecessors, (962), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 10 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-24 01:15:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1018 transitions. [2022-02-24 01:15:25,851 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1018 transitions. Word has length 66 [2022-02-24 01:15:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:25,851 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1018 transitions. [2022-02-24 01:15:25,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:15:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1018 transitions. [2022-02-24 01:15:25,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:15:25,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:25,853 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:25,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 01:15:25,853 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:25,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:25,854 INFO L85 PathProgramCache]: Analyzing trace with hash 276895843, now seen corresponding path program 11 times [2022-02-24 01:15:25,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:25,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90271631] [2022-02-24 01:15:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:25,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:25,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:25,857 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:25,857 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:26,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:26,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 01:15:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:26,811 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:26,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90271631] [2022-02-24 01:15:26,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [90271631] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:26,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:26,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:15:26,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938401354] [2022-02-24 01:15:26,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:26,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:15:26,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:26,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:15:26,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:15:26,812 INFO L87 Difference]: Start difference. First operand 847 states and 1018 transitions. Second operand has 33 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:15:30,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:30,516 INFO L93 Difference]: Finished difference Result 991 states and 1186 transitions. [2022-02-24 01:15:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 01:15:30,517 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-24 01:15:30,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:30,518 INFO L225 Difference]: With dead ends: 991 [2022-02-24 01:15:30,518 INFO L226 Difference]: Without dead ends: 989 [2022-02-24 01:15:30,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=812, Invalid=7560, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 01:15:30,520 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 282 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 2426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:30,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 90 Invalid, 2426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:15:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-02-24 01:15:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 897. [2022-02-24 01:15:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 849 states have (on average 1.1955241460541814) internal successors, (1015), 869 states have internal predecessors, (1015), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (30), 11 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-24 01:15:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1077 transitions. [2022-02-24 01:15:31,488 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1077 transitions. Word has length 66 [2022-02-24 01:15:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:31,488 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1077 transitions. [2022-02-24 01:15:31,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:15:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1077 transitions. [2022-02-24 01:15:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:15:31,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:31,489 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:31,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 01:15:31,489 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:31,490 INFO L85 PathProgramCache]: Analyzing trace with hash -614168551, now seen corresponding path program 12 times [2022-02-24 01:15:31,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:31,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703579030] [2022-02-24 01:15:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:31,492 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:31,492 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:31,492 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:32,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:32,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 01:15:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:32,313 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:32,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703579030] [2022-02-24 01:15:32,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [703579030] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:32,314 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:32,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:15:32,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424415754] [2022-02-24 01:15:32,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:32,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:15:32,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:32,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:15:32,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:15:32,315 INFO L87 Difference]: Start difference. First operand 897 states and 1077 transitions. Second operand has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:15:36,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:36,077 INFO L93 Difference]: Finished difference Result 1115 states and 1337 transitions. [2022-02-24 01:15:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 01:15:36,077 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-24 01:15:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:36,079 INFO L225 Difference]: With dead ends: 1115 [2022-02-24 01:15:36,079 INFO L226 Difference]: Without dead ends: 1113 [2022-02-24 01:15:36,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=943, Invalid=7067, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 01:15:36,080 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 244 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:36,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 114 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:15:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-02-24 01:15:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 917. [2022-02-24 01:15:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 867 states have (on average 1.1949250288350635) internal successors, (1036), 887 states have internal predecessors, (1036), 33 states have call successors, (33), 17 states have call predecessors, (33), 16 states have return successors, (31), 12 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-24 01:15:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1100 transitions. [2022-02-24 01:15:37,090 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1100 transitions. Word has length 66 [2022-02-24 01:15:37,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:37,091 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 1100 transitions. [2022-02-24 01:15:37,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:15:37,091 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1100 transitions. [2022-02-24 01:15:37,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:15:37,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:37,092 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:37,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 01:15:37,092 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash -275259755, now seen corresponding path program 15 times [2022-02-24 01:15:37,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:37,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538156890] [2022-02-24 01:15:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:37,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:37,095 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:37,095 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:37,096 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:37,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:37,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 01:15:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:37,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-24 01:15:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:37,484 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:37,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538156890] [2022-02-24 01:15:37,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1538156890] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:37,484 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:37,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:15:37,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189636975] [2022-02-24 01:15:37,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:37,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:15:37,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:37,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:15:37,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:15:37,485 INFO L87 Difference]: Start difference. First operand 917 states and 1100 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:15:40,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:40,009 INFO L93 Difference]: Finished difference Result 1080 states and 1296 transitions. [2022-02-24 01:15:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 01:15:40,009 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-02-24 01:15:40,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:40,011 INFO L225 Difference]: With dead ends: 1080 [2022-02-24 01:15:40,011 INFO L226 Difference]: Without dead ends: 1078 [2022-02-24 01:15:40,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=432, Invalid=2874, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 01:15:40,011 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 278 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:40,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 71 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:15:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2022-02-24 01:15:41,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 940. [2022-02-24 01:15:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 885 states have (on average 1.190960451977401) internal successors, (1054), 908 states have internal predecessors, (1054), 38 states have call successors, (38), 17 states have call predecessors, (38), 16 states have return successors, (36), 14 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-24 01:15:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1128 transitions. [2022-02-24 01:15:41,119 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1128 transitions. Word has length 68 [2022-02-24 01:15:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:41,119 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 1128 transitions. [2022-02-24 01:15:41,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:15:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1128 transitions. [2022-02-24 01:15:41,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:15:41,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:41,121 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:41,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 01:15:41,121 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:41,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1734012123, now seen corresponding path program 16 times [2022-02-24 01:15:41,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:41,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673099054] [2022-02-24 01:15:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:41,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:41,125 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:41,125 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:41,125 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:41,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:41,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 01:15:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:41,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-24 01:15:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:41,504 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:41,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673099054] [2022-02-24 01:15:41,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673099054] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:41,505 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:41,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:15:41,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418677549] [2022-02-24 01:15:41,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:41,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:15:41,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:15:41,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:15:41,505 INFO L87 Difference]: Start difference. First operand 940 states and 1128 transitions. Second operand has 22 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:15:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:43,569 INFO L93 Difference]: Finished difference Result 1013 states and 1216 transitions. [2022-02-24 01:15:43,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:15:43,569 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-02-24 01:15:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:43,571 INFO L225 Difference]: With dead ends: 1013 [2022-02-24 01:15:43,571 INFO L226 Difference]: Without dead ends: 1011 [2022-02-24 01:15:43,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1561, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:15:43,571 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 157 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:43,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 62 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:15:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-02-24 01:15:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 950. [2022-02-24 01:15:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 892 states have (on average 1.1905829596412556) internal successors, (1062), 917 states have internal predecessors, (1062), 41 states have call successors, (41), 17 states have call predecessors, (41), 16 states have return successors, (39), 15 states have call predecessors, (39), 39 states have call successors, (39) [2022-02-24 01:15:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1142 transitions. [2022-02-24 01:15:44,702 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1142 transitions. Word has length 68 [2022-02-24 01:15:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:44,702 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1142 transitions. [2022-02-24 01:15:44,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:15:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1142 transitions. [2022-02-24 01:15:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:15:44,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:44,704 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:44,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 01:15:44,704 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1737340720, now seen corresponding path program 23 times [2022-02-24 01:15:44,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:44,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135571874] [2022-02-24 01:15:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:44,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:44,707 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:44,707 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:44,707 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:45,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:45,630 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:45,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135571874] [2022-02-24 01:15:45,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [135571874] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:45,631 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:45,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:15:45,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073453080] [2022-02-24 01:15:45,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:45,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:15:45,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:45,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:15:45,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:15:45,631 INFO L87 Difference]: Start difference. First operand 950 states and 1142 transitions. Second operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:49,659 INFO L93 Difference]: Finished difference Result 1284 states and 1550 transitions. [2022-02-24 01:15:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 01:15:49,659 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:15:49,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:49,661 INFO L225 Difference]: With dead ends: 1284 [2022-02-24 01:15:49,661 INFO L226 Difference]: Without dead ends: 1282 [2022-02-24 01:15:49,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=671, Invalid=5809, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 01:15:49,662 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 379 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2846 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 2846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:49,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 99 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 2846 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 01:15:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-02-24 01:15:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 983. [2022-02-24 01:15:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 921 states have (on average 1.1900108577633008) internal successors, (1096), 948 states have internal predecessors, (1096), 43 states have call successors, (43), 19 states have call predecessors, (43), 18 states have return successors, (41), 15 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-24 01:15:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1180 transitions. [2022-02-24 01:15:50,863 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1180 transitions. Word has length 66 [2022-02-24 01:15:50,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:50,863 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 1180 transitions. [2022-02-24 01:15:50,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1180 transitions. [2022-02-24 01:15:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:15:50,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:50,865 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:50,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-24 01:15:50,865 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:50,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:50,865 INFO L85 PathProgramCache]: Analyzing trace with hash 688449750, now seen corresponding path program 24 times [2022-02-24 01:15:50,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:50,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909315696] [2022-02-24 01:15:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:50,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:50,868 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:50,868 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:50,868 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:51,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:51,473 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:51,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909315696] [2022-02-24 01:15:51,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [909315696] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:51,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:51,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:15:51,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202483880] [2022-02-24 01:15:51,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:51,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:15:51,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:51,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:15:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:15:51,474 INFO L87 Difference]: Start difference. First operand 983 states and 1180 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:54,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:54,906 INFO L93 Difference]: Finished difference Result 1175 states and 1411 transitions. [2022-02-24 01:15:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 01:15:54,907 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:15:54,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:54,909 INFO L225 Difference]: With dead ends: 1175 [2022-02-24 01:15:54,909 INFO L226 Difference]: Without dead ends: 1173 [2022-02-24 01:15:54,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=739, Invalid=4811, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 01:15:54,910 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 312 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:54,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 102 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:15:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2022-02-24 01:15:56,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 993. [2022-02-24 01:15:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 930 states have (on average 1.1903225806451614) internal successors, (1107), 957 states have internal predecessors, (1107), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (41), 15 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-24 01:15:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1191 transitions. [2022-02-24 01:15:56,130 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1191 transitions. Word has length 66 [2022-02-24 01:15:56,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:56,130 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1191 transitions. [2022-02-24 01:15:56,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:56,130 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1191 transitions. [2022-02-24 01:15:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:15:56,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:56,132 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:56,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-24 01:15:56,132 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:56,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:56,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1136950192, now seen corresponding path program 25 times [2022-02-24 01:15:56,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:56,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407932814] [2022-02-24 01:15:56,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:56,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:56,135 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:56,135 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:56,136 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:56,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:56,677 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:56,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407932814] [2022-02-24 01:15:56,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1407932814] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:56,678 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:56,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:15:56,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036898723] [2022-02-24 01:15:56,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:56,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:15:56,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:56,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:15:56,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:15:56,679 INFO L87 Difference]: Start difference. First operand 993 states and 1191 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:00,344 INFO L93 Difference]: Finished difference Result 1206 states and 1444 transitions. [2022-02-24 01:16:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-24 01:16:00,345 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:16:00,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:00,347 INFO L225 Difference]: With dead ends: 1206 [2022-02-24 01:16:00,347 INFO L226 Difference]: Without dead ends: 1204 [2022-02-24 01:16:00,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=749, Invalid=5257, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 01:16:00,348 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 339 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2232 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:00,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 119 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2232 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:16:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-02-24 01:16:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1005. [2022-02-24 01:16:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 942 states have (on average 1.1921443736730362) internal successors, (1123), 969 states have internal predecessors, (1123), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (41), 15 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-24 01:16:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1207 transitions. [2022-02-24 01:16:01,559 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1207 transitions. Word has length 66 [2022-02-24 01:16:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:01,559 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 1207 transitions. [2022-02-24 01:16:01,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1207 transitions. [2022-02-24 01:16:01,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:16:01,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:01,561 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:01,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-24 01:16:01,561 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1971314326, now seen corresponding path program 26 times [2022-02-24 01:16:01,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:01,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354122608] [2022-02-24 01:16:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:01,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:01,565 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:01,565 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:01,565 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:02,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:02,222 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:02,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354122608] [2022-02-24 01:16:02,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [354122608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:02,222 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:02,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:16:02,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458039158] [2022-02-24 01:16:02,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:02,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:16:02,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:02,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:16:02,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:16:02,223 INFO L87 Difference]: Start difference. First operand 1005 states and 1207 transitions. Second operand has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-02-24 01:16:05,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:05,287 INFO L93 Difference]: Finished difference Result 1114 states and 1330 transitions. [2022-02-24 01:16:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 01:16:05,287 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 66 [2022-02-24 01:16:05,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:05,289 INFO L225 Difference]: With dead ends: 1114 [2022-02-24 01:16:05,289 INFO L226 Difference]: Without dead ends: 1112 [2022-02-24 01:16:05,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=552, Invalid=4140, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:16:05,290 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 226 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:05,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 90 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1913 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:16:05,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-02-24 01:16:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1009. [2022-02-24 01:16:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 945 states have (on average 1.1915343915343914) internal successors, (1126), 972 states have internal predecessors, (1126), 43 states have call successors, (43), 21 states have call predecessors, (43), 20 states have return successors, (41), 15 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-24 01:16:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1210 transitions. [2022-02-24 01:16:06,587 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1210 transitions. Word has length 66 [2022-02-24 01:16:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:06,587 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1210 transitions. [2022-02-24 01:16:06,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-02-24 01:16:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1210 transitions. [2022-02-24 01:16:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:16:06,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:06,588 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:06,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-24 01:16:06,588 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:06,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2061955934, now seen corresponding path program 27 times [2022-02-24 01:16:06,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:06,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833947134] [2022-02-24 01:16:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:06,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:06,591 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:06,591 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:06,591 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:07,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:07,389 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:07,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833947134] [2022-02-24 01:16:07,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [833947134] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:07,389 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:07,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:16:07,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450831532] [2022-02-24 01:16:07,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:07,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:16:07,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:07,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:16:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:16:07,390 INFO L87 Difference]: Start difference. First operand 1009 states and 1210 transitions. Second operand has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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) [2022-02-24 01:16:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:10,539 INFO L93 Difference]: Finished difference Result 1260 states and 1508 transitions. [2022-02-24 01:16:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 01:16:10,539 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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 66 [2022-02-24 01:16:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:10,542 INFO L225 Difference]: With dead ends: 1260 [2022-02-24 01:16:10,542 INFO L226 Difference]: Without dead ends: 1258 [2022-02-24 01:16:10,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=666, Invalid=4164, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 01:16:10,543 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 173 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:10,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 104 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:16:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-02-24 01:16:11,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1040. [2022-02-24 01:16:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 978 states have (on average 1.1932515337423313) internal successors, (1167), 1005 states have internal predecessors, (1167), 41 states have call successors, (41), 21 states have call predecessors, (41), 20 states have return successors, (39), 13 states have call predecessors, (39), 39 states have call successors, (39) [2022-02-24 01:16:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1247 transitions. [2022-02-24 01:16:11,996 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1247 transitions. Word has length 66 [2022-02-24 01:16:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:11,996 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 1247 transitions. [2022-02-24 01:16:11,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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) [2022-02-24 01:16:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1247 transitions. [2022-02-24 01:16:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:16:11,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:11,998 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:11,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-24 01:16:11,998 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:11,998 INFO L85 PathProgramCache]: Analyzing trace with hash -140337438, now seen corresponding path program 28 times [2022-02-24 01:16:11,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:11,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315869125] [2022-02-24 01:16:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:11,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:12,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:12,001 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:12,001 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:12,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:12,636 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:12,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315869125] [2022-02-24 01:16:12,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [315869125] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:12,636 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:12,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:16:12,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067088130] [2022-02-24 01:16:12,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:12,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:16:12,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:12,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:16:12,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:16:12,637 INFO L87 Difference]: Start difference. First operand 1040 states and 1247 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:15,996 INFO L93 Difference]: Finished difference Result 1235 states and 1484 transitions. [2022-02-24 01:16:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 01:16:15,997 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:16:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:15,999 INFO L225 Difference]: With dead ends: 1235 [2022-02-24 01:16:15,999 INFO L226 Difference]: Without dead ends: 1233 [2022-02-24 01:16:15,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=553, Invalid=4003, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 01:16:15,999 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 194 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:15,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 86 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:16:16,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-02-24 01:16:17,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1107. [2022-02-24 01:16:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1039 states have (on average 1.1944177093358999) internal successors, (1241), 1071 states have internal predecessors, (1241), 46 states have call successors, (46), 22 states have call predecessors, (46), 21 states have return successors, (44), 13 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-24 01:16:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1331 transitions. [2022-02-24 01:16:17,424 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1331 transitions. Word has length 66 [2022-02-24 01:16:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:17,425 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1331 transitions. [2022-02-24 01:16:17,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1331 transitions. [2022-02-24 01:16:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:16:17,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:17,426 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:17,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-24 01:16:17,426 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:17,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1333008662, now seen corresponding path program 29 times [2022-02-24 01:16:17,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:17,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072809496] [2022-02-24 01:16:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:17,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:17,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:17,430 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:17,430 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:18,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:18,216 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:18,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072809496] [2022-02-24 01:16:18,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1072809496] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:18,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:18,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:16:18,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338154552] [2022-02-24 01:16:18,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:18,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:16:18,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:16:18,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:16:18,218 INFO L87 Difference]: Start difference. First operand 1107 states and 1331 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:21,902 INFO L93 Difference]: Finished difference Result 1266 states and 1515 transitions. [2022-02-24 01:16:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 01:16:21,903 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:16:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:21,905 INFO L225 Difference]: With dead ends: 1266 [2022-02-24 01:16:21,905 INFO L226 Difference]: Without dead ends: 1264 [2022-02-24 01:16:21,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=714, Invalid=4836, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 01:16:21,906 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 179 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:21,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 103 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:16:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-02-24 01:16:23,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1114. [2022-02-24 01:16:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1045 states have (on average 1.1933014354066986) internal successors, (1247), 1077 states have internal predecessors, (1247), 46 states have call successors, (46), 23 states have call predecessors, (46), 22 states have return successors, (44), 13 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-24 01:16:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1337 transitions. [2022-02-24 01:16:23,425 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1337 transitions. Word has length 66 [2022-02-24 01:16:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:23,425 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1337 transitions. [2022-02-24 01:16:23,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1337 transitions. [2022-02-24 01:16:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:16:23,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:23,427 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:23,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-24 01:16:23,427 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:23,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1811130830, now seen corresponding path program 19 times [2022-02-24 01:16:23,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:23,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835441634] [2022-02-24 01:16:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:23,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:23,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:23,430 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:23,430 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:24,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:24,176 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:24,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835441634] [2022-02-24 01:16:24,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1835441634] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:24,176 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:24,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:16:24,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600096951] [2022-02-24 01:16:24,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:24,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:16:24,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:24,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:16:24,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:16:24,177 INFO L87 Difference]: Start difference. First operand 1114 states and 1337 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:28,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:28,269 INFO L93 Difference]: Finished difference Result 1344 states and 1617 transitions. [2022-02-24 01:16:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 01:16:28,270 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:16:28,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:28,272 INFO L225 Difference]: With dead ends: 1344 [2022-02-24 01:16:28,273 INFO L226 Difference]: Without dead ends: 1342 [2022-02-24 01:16:28,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=687, Invalid=5475, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 01:16:28,273 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 291 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:28,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 82 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2560 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:16:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-02-24 01:16:29,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1127. [2022-02-24 01:16:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1055 states have (on average 1.1914691943127962) internal successors, (1257), 1089 states have internal predecessors, (1257), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 13 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-24 01:16:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1351 transitions. [2022-02-24 01:16:29,827 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1351 transitions. Word has length 66 [2022-02-24 01:16:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:29,827 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 1351 transitions. [2022-02-24 01:16:29,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1351 transitions. [2022-02-24 01:16:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:16:29,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:29,829 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:29,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-24 01:16:29,829 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:29,829 INFO L85 PathProgramCache]: Analyzing trace with hash 624428052, now seen corresponding path program 20 times [2022-02-24 01:16:29,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:29,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123915759] [2022-02-24 01:16:29,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:29,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:29,832 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:29,832 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:29,832 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:30,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:30,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:30,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123915759] [2022-02-24 01:16:30,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1123915759] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:30,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:30,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:16:30,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606793227] [2022-02-24 01:16:30,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:30,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:16:30,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:30,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:16:30,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:16:30,645 INFO L87 Difference]: Start difference. First operand 1127 states and 1351 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:34,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:34,889 INFO L93 Difference]: Finished difference Result 1398 states and 1680 transitions. [2022-02-24 01:16:34,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 01:16:34,890 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:16:34,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:34,892 INFO L225 Difference]: With dead ends: 1398 [2022-02-24 01:16:34,892 INFO L226 Difference]: Without dead ends: 1396 [2022-02-24 01:16:34,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=743, Invalid=6229, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 01:16:34,892 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 334 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:34,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 120 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2374 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:16:34,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-02-24 01:16:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1134. [2022-02-24 01:16:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1061 states have (on average 1.1913289349670122) internal successors, (1264), 1095 states have internal predecessors, (1264), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (46), 13 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-24 01:16:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1358 transitions. [2022-02-24 01:16:36,410 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1358 transitions. Word has length 66 [2022-02-24 01:16:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:36,410 INFO L470 AbstractCegarLoop]: Abstraction has 1134 states and 1358 transitions. [2022-02-24 01:16:36,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1358 transitions. [2022-02-24 01:16:36,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:16:36,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:36,412 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:36,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-24 01:16:36,412 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:36,412 INFO L85 PathProgramCache]: Analyzing trace with hash -337327382, now seen corresponding path program 21 times [2022-02-24 01:16:36,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:36,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818932745] [2022-02-24 01:16:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:36,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:36,415 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:36,415 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:36,415 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:37,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:37,255 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:37,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818932745] [2022-02-24 01:16:37,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1818932745] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:37,255 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:37,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:16:37,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001481104] [2022-02-24 01:16:37,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:37,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:16:37,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:37,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:16:37,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:16:37,256 INFO L87 Difference]: Start difference. First operand 1134 states and 1358 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:40,602 INFO L93 Difference]: Finished difference Result 1264 states and 1514 transitions. [2022-02-24 01:16:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:16:40,602 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:16:40,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:40,603 INFO L225 Difference]: With dead ends: 1264 [2022-02-24 01:16:40,604 INFO L226 Difference]: Without dead ends: 1262 [2022-02-24 01:16:40,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=714, Invalid=3576, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 01:16:40,604 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 169 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:40,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 111 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:16:40,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-02-24 01:16:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1140. [2022-02-24 01:16:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1068 states have (on average 1.1919475655430711) internal successors, (1273), 1101 states have internal predecessors, (1273), 47 states have call successors, (47), 25 states have call predecessors, (47), 24 states have return successors, (45), 13 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-24 01:16:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1365 transitions. [2022-02-24 01:16:42,180 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1365 transitions. Word has length 66 [2022-02-24 01:16:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:42,181 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 1365 transitions. [2022-02-24 01:16:42,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1365 transitions. [2022-02-24 01:16:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:16:42,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:42,182 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:42,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-24 01:16:42,183 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:42,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:42,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1584291114, now seen corresponding path program 22 times [2022-02-24 01:16:42,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:42,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39957755] [2022-02-24 01:16:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:42,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:42,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:42,185 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:42,186 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:43,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:43,103 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:43,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39957755] [2022-02-24 01:16:43,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [39957755] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:43,103 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:43,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:16:43,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157154581] [2022-02-24 01:16:43,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:43,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:16:43,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:43,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:16:43,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:16:43,104 INFO L87 Difference]: Start difference. First operand 1140 states and 1365 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:47,465 INFO L93 Difference]: Finished difference Result 1446 states and 1736 transitions. [2022-02-24 01:16:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 01:16:47,465 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:16:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:47,468 INFO L225 Difference]: With dead ends: 1446 [2022-02-24 01:16:47,468 INFO L226 Difference]: Without dead ends: 1444 [2022-02-24 01:16:47,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=698, Invalid=5622, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 01:16:47,469 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 288 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:47,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 124 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2586 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:16:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-02-24 01:16:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1156. [2022-02-24 01:16:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1081 states have (on average 1.1914893617021276) internal successors, (1288), 1116 states have internal predecessors, (1288), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (47), 13 states have call predecessors, (47), 47 states have call successors, (47) [2022-02-24 01:16:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1384 transitions. [2022-02-24 01:16:49,081 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1384 transitions. Word has length 66 [2022-02-24 01:16:49,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:49,081 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1384 transitions. [2022-02-24 01:16:49,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:49,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1384 transitions. [2022-02-24 01:16:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:16:49,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:49,083 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:49,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-24 01:16:49,083 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:49,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1360968119, now seen corresponding path program 13 times [2022-02-24 01:16:49,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:49,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573680144] [2022-02-24 01:16:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:49,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:49,086 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:49,086 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:49,086 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:49,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:49,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-24 01:16:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:49,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 01:16:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:49,993 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:49,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573680144] [2022-02-24 01:16:49,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1573680144] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:49,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:49,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:16:49,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753817969] [2022-02-24 01:16:49,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:49,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:16:49,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:49,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:16:49,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:16:49,994 INFO L87 Difference]: Start difference. First operand 1156 states and 1384 transitions. Second operand has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:16:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:54,558 INFO L93 Difference]: Finished difference Result 1257 states and 1499 transitions. [2022-02-24 01:16:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 01:16:54,558 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2022-02-24 01:16:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:54,560 INFO L225 Difference]: With dead ends: 1257 [2022-02-24 01:16:54,561 INFO L226 Difference]: Without dead ends: 1208 [2022-02-24 01:16:54,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1186, Invalid=6124, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 01:16:54,562 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 214 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:54,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 117 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:16:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-02-24 01:16:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1162. [2022-02-24 01:16:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1087 states have (on average 1.1913523459061637) internal successors, (1295), 1122 states have internal predecessors, (1295), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (47), 13 states have call predecessors, (47), 47 states have call successors, (47) [2022-02-24 01:16:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1391 transitions. [2022-02-24 01:16:56,159 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1391 transitions. Word has length 69 [2022-02-24 01:16:56,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:56,159 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1391 transitions. [2022-02-24 01:16:56,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:16:56,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1391 transitions. [2022-02-24 01:16:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:16:56,161 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:56,161 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:56,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-24 01:16:56,161 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:56,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1755632320, now seen corresponding path program 14 times [2022-02-24 01:16:56,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:56,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849119720] [2022-02-24 01:16:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:56,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:56,164 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:56,164 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:56,164 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:57,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:57,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 01:16:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:57,165 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:57,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849119720] [2022-02-24 01:16:57,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1849119720] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:57,165 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:57,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:16:57,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145806014] [2022-02-24 01:16:57,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:57,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:16:57,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:57,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:16:57,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:16:57,166 INFO L87 Difference]: Start difference. First operand 1162 states and 1391 transitions. Second operand has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:17:03,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:03,138 INFO L93 Difference]: Finished difference Result 1450 states and 1741 transitions. [2022-02-24 01:17:03,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 01:17:03,139 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-24 01:17:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:03,141 INFO L225 Difference]: With dead ends: 1450 [2022-02-24 01:17:03,141 INFO L226 Difference]: Without dead ends: 1448 [2022-02-24 01:17:03,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1517, Invalid=9613, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 01:17:03,141 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 365 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:03,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 114 Invalid, 2451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:17:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2022-02-24 01:17:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1193. [2022-02-24 01:17:04,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1121 states have (on average 1.1935771632471008) internal successors, (1338), 1154 states have internal predecessors, (1338), 47 states have call successors, (47), 25 states have call predecessors, (47), 24 states have return successors, (45), 13 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-24 01:17:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1430 transitions. [2022-02-24 01:17:04,748 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1430 transitions. Word has length 69 [2022-02-24 01:17:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:04,748 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 1430 transitions. [2022-02-24 01:17:04,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:17:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1430 transitions. [2022-02-24 01:17:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:17:04,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:04,750 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:04,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-24 01:17:04,750 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1758967990, now seen corresponding path program 15 times [2022-02-24 01:17:04,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:04,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148948895] [2022-02-24 01:17:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:04,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:04,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:04,753 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:04,753 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:05,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:05,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 01:17:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:05,636 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:05,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148948895] [2022-02-24 01:17:05,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [148948895] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:05,637 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:05,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:17:05,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649836612] [2022-02-24 01:17:05,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:05,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:17:05,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:05,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:17:05,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:17:05,638 INFO L87 Difference]: Start difference. First operand 1193 states and 1430 transitions. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:17:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:09,701 INFO L93 Difference]: Finished difference Result 1321 states and 1583 transitions. [2022-02-24 01:17:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-24 01:17:09,701 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-24 01:17:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:09,703 INFO L225 Difference]: With dead ends: 1321 [2022-02-24 01:17:09,703 INFO L226 Difference]: Without dead ends: 1319 [2022-02-24 01:17:09,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2467 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=789, Invalid=6867, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 01:17:09,704 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 285 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:09,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 76 Invalid, 2374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:17:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-02-24 01:17:11,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1208. [2022-02-24 01:17:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1135 states have (on average 1.1938325991189427) internal successors, (1355), 1169 states have internal predecessors, (1355), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (46), 13 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-24 01:17:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1449 transitions. [2022-02-24 01:17:11,374 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1449 transitions. Word has length 69 [2022-02-24 01:17:11,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:11,374 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 1449 transitions. [2022-02-24 01:17:11,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:17:11,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1449 transitions. [2022-02-24 01:17:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:17:11,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:11,376 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:11,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-24 01:17:11,376 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:11,377 INFO L85 PathProgramCache]: Analyzing trace with hash -310743238, now seen corresponding path program 16 times [2022-02-24 01:17:11,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:11,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830944331] [2022-02-24 01:17:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:11,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:11,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:11,379 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:11,380 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:12,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:12,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 01:17:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:12,301 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:12,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830944331] [2022-02-24 01:17:12,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1830944331] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:12,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:12,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:17:12,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074068254] [2022-02-24 01:17:12,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:12,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:17:12,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:17:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:17:12,302 INFO L87 Difference]: Start difference. First operand 1208 states and 1449 transitions. Second operand has 37 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:17:17,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:17,051 INFO L93 Difference]: Finished difference Result 1359 states and 1631 transitions. [2022-02-24 01:17:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 01:17:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-24 01:17:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:17,053 INFO L225 Difference]: With dead ends: 1359 [2022-02-24 01:17:17,053 INFO L226 Difference]: Without dead ends: 1357 [2022-02-24 01:17:17,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2656 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1018, Invalid=7538, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 01:17:17,054 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 273 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:17,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 118 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:17:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-02-24 01:17:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1232. [2022-02-24 01:17:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1159 states have (on average 1.193270060396894) internal successors, (1383), 1193 states have internal predecessors, (1383), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (46), 13 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-24 01:17:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1477 transitions. [2022-02-24 01:17:18,742 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1477 transitions. Word has length 69 [2022-02-24 01:17:18,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:18,743 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1477 transitions. [2022-02-24 01:17:18,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:17:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1477 transitions. [2022-02-24 01:17:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:17:18,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:18,744 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:18,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-24 01:17:18,744 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:18,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1053663758, now seen corresponding path program 17 times [2022-02-24 01:17:18,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:18,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510106692] [2022-02-24 01:17:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:18,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:18,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:18,747 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:18,747 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:19,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:19,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 01:17:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:19,489 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:19,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510106692] [2022-02-24 01:17:19,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1510106692] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:19,489 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:19,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:17:19,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461247813] [2022-02-24 01:17:19,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:19,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:17:19,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:19,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:17:19,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:17:19,490 INFO L87 Difference]: Start difference. First operand 1232 states and 1477 transitions. Second operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:17:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:23,825 INFO L93 Difference]: Finished difference Result 1402 states and 1685 transitions. [2022-02-24 01:17:23,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 01:17:23,826 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-24 01:17:23,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:23,827 INFO L225 Difference]: With dead ends: 1402 [2022-02-24 01:17:23,827 INFO L226 Difference]: Without dead ends: 1400 [2022-02-24 01:17:23,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=826, Invalid=5336, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 01:17:23,828 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 216 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:23,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 101 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:17:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-02-24 01:17:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1232. [2022-02-24 01:17:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1159 states have (on average 1.193270060396894) internal successors, (1383), 1193 states have internal predecessors, (1383), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (46), 13 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-24 01:17:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1477 transitions. [2022-02-24 01:17:25,476 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1477 transitions. Word has length 69 [2022-02-24 01:17:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:25,476 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1477 transitions. [2022-02-24 01:17:25,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:17:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1477 transitions. [2022-02-24 01:17:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:17:25,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:25,478 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:25,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-24 01:17:25,479 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1944728152, now seen corresponding path program 18 times [2022-02-24 01:17:25,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:25,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879074908] [2022-02-24 01:17:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:25,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:25,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:25,482 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:25,482 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:26,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:26,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-24 01:17:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:26,313 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:26,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879074908] [2022-02-24 01:17:26,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [879074908] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:26,313 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:26,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:17:26,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390634319] [2022-02-24 01:17:26,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:26,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:17:26,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:26,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:17:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:17:26,314 INFO L87 Difference]: Start difference. First operand 1232 states and 1477 transitions. Second operand has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:17:30,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:30,258 INFO L93 Difference]: Finished difference Result 1307 states and 1564 transitions. [2022-02-24 01:17:30,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 01:17:30,258 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-24 01:17:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:30,260 INFO L225 Difference]: With dead ends: 1307 [2022-02-24 01:17:30,260 INFO L226 Difference]: Without dead ends: 1305 [2022-02-24 01:17:30,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=724, Invalid=6248, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 01:17:30,261 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 168 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:30,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 107 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:17:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2022-02-24 01:17:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1226. [2022-02-24 01:17:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1154 states have (on average 1.194107452339688) internal successors, (1378), 1187 states have internal predecessors, (1378), 47 states have call successors, (47), 25 states have call predecessors, (47), 24 states have return successors, (45), 13 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-24 01:17:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1470 transitions. [2022-02-24 01:17:31,945 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1470 transitions. Word has length 69 [2022-02-24 01:17:31,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:31,945 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1470 transitions. [2022-02-24 01:17:31,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:17:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1470 transitions. [2022-02-24 01:17:31,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 01:17:31,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:31,946 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:31,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-24 01:17:31,946 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:31,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1004222264, now seen corresponding path program 17 times [2022-02-24 01:17:31,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:31,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513680710] [2022-02-24 01:17:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:31,949 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:31,949 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:31,949 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:32,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:32,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 01:17:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:32,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 01:17:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:32,323 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:32,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513680710] [2022-02-24 01:17:32,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [513680710] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:32,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:32,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:17:32,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750354682] [2022-02-24 01:17:32,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:32,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:17:32,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:17:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:17:32,324 INFO L87 Difference]: Start difference. First operand 1226 states and 1470 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:17:35,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:35,820 INFO L93 Difference]: Finished difference Result 1369 states and 1643 transitions. [2022-02-24 01:17:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:17:35,820 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2022-02-24 01:17:35,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:35,822 INFO L225 Difference]: With dead ends: 1369 [2022-02-24 01:17:35,822 INFO L226 Difference]: Without dead ends: 1367 [2022-02-24 01:17:35,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=373, Invalid=2819, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:17:35,822 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 253 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:35,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 118 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:17:35,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2022-02-24 01:17:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1167. [2022-02-24 01:17:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1102 states have (on average 1.1978221415607986) internal successors, (1320), 1130 states have internal predecessors, (1320), 42 states have call successors, (42), 23 states have call predecessors, (42), 22 states have return successors, (40), 13 states have call predecessors, (40), 40 states have call successors, (40) [2022-02-24 01:17:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1402 transitions. [2022-02-24 01:17:37,386 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1402 transitions. Word has length 71 [2022-02-24 01:17:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:37,386 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1402 transitions. [2022-02-24 01:17:37,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:17:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1402 transitions. [2022-02-24 01:17:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 01:17:37,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:37,387 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:37,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-24 01:17:37,387 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:37,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2022160008, now seen corresponding path program 18 times [2022-02-24 01:17:37,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:37,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135084608] [2022-02-24 01:17:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:37,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:37,391 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:37,391 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:37,391 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:38,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:38,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-24 01:17:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:38,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 01:17:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:38,031 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:38,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135084608] [2022-02-24 01:17:38,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [135084608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:38,031 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:38,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:17:38,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880605822] [2022-02-24 01:17:38,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:38,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:17:38,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:38,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:17:38,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:17:38,033 INFO L87 Difference]: Start difference. First operand 1167 states and 1402 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:17:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:41,665 INFO L93 Difference]: Finished difference Result 1271 states and 1525 transitions. [2022-02-24 01:17:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 01:17:41,665 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2022-02-24 01:17:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:41,667 INFO L225 Difference]: With dead ends: 1271 [2022-02-24 01:17:41,667 INFO L226 Difference]: Without dead ends: 1269 [2022-02-24 01:17:41,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=531, Invalid=4299, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 01:17:41,668 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 251 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:41,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 106 Invalid, 2218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:17:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-02-24 01:17:43,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1237. [2022-02-24 01:17:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1166 states have (on average 1.1938250428816466) internal successors, (1392), 1196 states have internal predecessors, (1392), 47 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (45), 16 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-24 01:17:43,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1484 transitions. [2022-02-24 01:17:43,380 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1484 transitions. Word has length 71 [2022-02-24 01:17:43,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:43,380 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 1484 transitions. [2022-02-24 01:17:43,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:17:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1484 transitions. [2022-02-24 01:17:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:17:43,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:43,382 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:43,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-24 01:17:43,382 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:43,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1795844299, now seen corresponding path program 30 times [2022-02-24 01:17:43,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:43,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058714101] [2022-02-24 01:17:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:43,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:43,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:43,385 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:43,385 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:43,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:43,742 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:43,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058714101] [2022-02-24 01:17:43,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2058714101] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:43,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:43,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:17:43,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069417142] [2022-02-24 01:17:43,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:43,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:17:43,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:43,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:17:43,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:17:43,743 INFO L87 Difference]: Start difference. First operand 1237 states and 1484 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:51,259 INFO L93 Difference]: Finished difference Result 1993 states and 2427 transitions. [2022-02-24 01:17:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-24 01:17:51,260 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 01:17:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:51,263 INFO L225 Difference]: With dead ends: 1993 [2022-02-24 01:17:51,263 INFO L226 Difference]: Without dead ends: 1991 [2022-02-24 01:17:51,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8041 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1654, Invalid=20102, Unknown=0, NotChecked=0, Total=21756 [2022-02-24 01:17:51,265 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 540 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 3239 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 3924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 3239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:51,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 81 Invalid, 3924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 3239 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 01:17:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2022-02-24 01:17:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1369. [2022-02-24 01:17:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1294 states have (on average 1.206336939721793) internal successors, (1561), 1326 states have internal predecessors, (1561), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (47), 16 states have call predecessors, (47), 47 states have call successors, (47) [2022-02-24 01:17:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1657 transitions. [2022-02-24 01:17:53,243 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1657 transitions. Word has length 69 [2022-02-24 01:17:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:53,243 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 1657 transitions. [2022-02-24 01:17:53,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1657 transitions. [2022-02-24 01:17:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:17:53,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:53,245 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:53,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-24 01:17:53,245 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:53,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1094779721, now seen corresponding path program 23 times [2022-02-24 01:17:53,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:53,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725536818] [2022-02-24 01:17:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:53,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:53,252 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:53,253 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:53,253 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:53,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:53,336 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:53,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725536818] [2022-02-24 01:17:53,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [725536818] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:53,336 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:53,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:17:53,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007682471] [2022-02-24 01:17:53,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:53,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:17:53,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:53,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:17:53,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:17:53,337 INFO L87 Difference]: Start difference. First operand 1369 states and 1657 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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) [2022-02-24 01:17:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:56,605 INFO L93 Difference]: Finished difference Result 1618 states and 1973 transitions. [2022-02-24 01:17:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:17:56,605 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 69 [2022-02-24 01:17:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:56,608 INFO L225 Difference]: With dead ends: 1618 [2022-02-24 01:17:56,608 INFO L226 Difference]: Without dead ends: 1589 [2022-02-24 01:17:56,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=655, Invalid=1697, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:17:56,608 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 222 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:56,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 62 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:17:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-02-24 01:17:58,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1372. [2022-02-24 01:17:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1297 states have (on average 1.2058596761757903) internal successors, (1564), 1329 states have internal predecessors, (1564), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (47), 16 states have call predecessors, (47), 47 states have call successors, (47) [2022-02-24 01:17:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1660 transitions. [2022-02-24 01:17:58,528 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1660 transitions. Word has length 69 [2022-02-24 01:17:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:58,528 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 1660 transitions. [2022-02-24 01:17:58,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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) [2022-02-24 01:17:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1660 transitions. [2022-02-24 01:17:58,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:17:58,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:58,529 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:58,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-24 01:17:58,529 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:58,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:58,530 INFO L85 PathProgramCache]: Analyzing trace with hash -671758409, now seen corresponding path program 24 times [2022-02-24 01:17:58,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:58,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430880003] [2022-02-24 01:17:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:58,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:58,533 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:58,533 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:58,533 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:59,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:59,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:59,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430880003] [2022-02-24 01:17:59,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1430880003] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:59,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:59,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:17:59,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991809636] [2022-02-24 01:17:59,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:59,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:17:59,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:59,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:17:59,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:17:59,078 INFO L87 Difference]: Start difference. First operand 1372 states and 1660 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:05,957 INFO L93 Difference]: Finished difference Result 1713 states and 2060 transitions. [2022-02-24 01:18:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-24 01:18:05,957 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 01:18:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:05,959 INFO L225 Difference]: With dead ends: 1713 [2022-02-24 01:18:05,959 INFO L226 Difference]: Without dead ends: 1711 [2022-02-24 01:18:05,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 4 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1039, Invalid=9673, Unknown=0, NotChecked=0, Total=10712 [2022-02-24 01:18:05,960 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 388 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4672 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 4977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 4672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:05,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 172 Invalid, 4977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 4672 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 01:18:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2022-02-24 01:18:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1334. [2022-02-24 01:18:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1264 states have (on average 1.2080696202531647) internal successors, (1527), 1295 states have internal predecessors, (1527), 46 states have call successors, (46), 24 states have call predecessors, (46), 23 states have return successors, (44), 14 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-24 01:18:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1617 transitions. [2022-02-24 01:18:07,861 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1617 transitions. Word has length 69 [2022-02-24 01:18:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:07,861 INFO L470 AbstractCegarLoop]: Abstraction has 1334 states and 1617 transitions. [2022-02-24 01:18:07,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1617 transitions. [2022-02-24 01:18:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:18:07,863 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:07,863 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:07,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-24 01:18:07,863 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:07,863 INFO L85 PathProgramCache]: Analyzing trace with hash -643408281, now seen corresponding path program 25 times [2022-02-24 01:18:07,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:07,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301436280] [2022-02-24 01:18:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:07,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:07,866 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:07,866 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:07,866 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:08,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:08,473 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:08,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301436280] [2022-02-24 01:18:08,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1301436280] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:08,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:08,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:18:08,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733138004] [2022-02-24 01:18:08,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:08,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:18:08,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:08,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:18:08,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:18:08,474 INFO L87 Difference]: Start difference. First operand 1334 states and 1617 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:13,316 INFO L93 Difference]: Finished difference Result 1527 states and 1842 transitions. [2022-02-24 01:18:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 01:18:13,316 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 01:18:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:13,318 INFO L225 Difference]: With dead ends: 1527 [2022-02-24 01:18:13,318 INFO L226 Difference]: Without dead ends: 1525 [2022-02-24 01:18:13,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=764, Invalid=5716, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 01:18:13,319 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 349 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 2817 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:13,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 140 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2817 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:18:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2022-02-24 01:18:15,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1368. [2022-02-24 01:18:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1297 states have (on average 1.210485736314572) internal successors, (1570), 1328 states have internal predecessors, (1570), 46 states have call successors, (46), 25 states have call predecessors, (46), 24 states have return successors, (44), 14 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-24 01:18:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1660 transitions. [2022-02-24 01:18:15,258 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1660 transitions. Word has length 69 [2022-02-24 01:18:15,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:15,258 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 1660 transitions. [2022-02-24 01:18:15,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1660 transitions. [2022-02-24 01:18:15,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:18:15,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:15,260 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:15,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-24 01:18:15,260 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1309954697, now seen corresponding path program 26 times [2022-02-24 01:18:15,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:15,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564806225] [2022-02-24 01:18:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:15,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:15,264 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:15,264 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:15,264 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:16,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:16,113 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:16,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564806225] [2022-02-24 01:18:16,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [564806225] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:16,114 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:16,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:18:16,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129325341] [2022-02-24 01:18:16,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:16,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:18:16,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:18:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:18:16,114 INFO L87 Difference]: Start difference. First operand 1368 states and 1660 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:21,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:21,227 INFO L93 Difference]: Finished difference Result 1625 states and 1966 transitions. [2022-02-24 01:18:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 01:18:21,228 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 01:18:21,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:21,230 INFO L225 Difference]: With dead ends: 1625 [2022-02-24 01:18:21,230 INFO L226 Difference]: Without dead ends: 1623 [2022-02-24 01:18:21,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=709, Invalid=6601, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 01:18:21,231 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 313 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3071 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:21,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 111 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3071 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 01:18:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-02-24 01:18:23,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1402. [2022-02-24 01:18:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1328 states have (on average 1.2115963855421688) internal successors, (1609), 1361 states have internal predecessors, (1609), 48 states have call successors, (48), 26 states have call predecessors, (48), 25 states have return successors, (46), 14 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-24 01:18:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 1703 transitions. [2022-02-24 01:18:23,213 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 1703 transitions. Word has length 69 [2022-02-24 01:18:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:23,213 INFO L470 AbstractCegarLoop]: Abstraction has 1402 states and 1703 transitions. [2022-02-24 01:18:23,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:23,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 1703 transitions. [2022-02-24 01:18:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 01:18:23,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:23,215 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:23,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-24 01:18:23,215 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:23,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:23,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1869063899, now seen corresponding path program 27 times [2022-02-24 01:18:23,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:23,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790182811] [2022-02-24 01:18:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:23,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:23,218 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:23,218 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:23,218 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:24,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:24,018 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:24,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790182811] [2022-02-24 01:18:24,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1790182811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:24,018 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:24,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:18:24,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431493249] [2022-02-24 01:18:24,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:24,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:18:24,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:24,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:18:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:18:24,019 INFO L87 Difference]: Start difference. First operand 1402 states and 1703 transitions. Second operand has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:29,183 INFO L93 Difference]: Finished difference Result 1701 states and 2063 transitions. [2022-02-24 01:18:29,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 01:18:29,184 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 01:18:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:29,186 INFO L225 Difference]: With dead ends: 1701 [2022-02-24 01:18:29,186 INFO L226 Difference]: Without dead ends: 1699 [2022-02-24 01:18:29,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=816, Invalid=6494, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 01:18:29,187 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 329 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:29,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 103 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:18:29,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-02-24 01:18:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1409. [2022-02-24 01:18:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1332 states have (on average 1.2102102102102101) internal successors, (1612), 1367 states have internal predecessors, (1612), 50 states have call successors, (50), 27 states have call predecessors, (50), 26 states have return successors, (48), 14 states have call predecessors, (48), 48 states have call successors, (48) [2022-02-24 01:18:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1710 transitions. [2022-02-24 01:18:31,212 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1710 transitions. Word has length 69 [2022-02-24 01:18:31,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:31,212 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 1710 transitions. [2022-02-24 01:18:31,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1710 transitions. [2022-02-24 01:18:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:18:31,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:31,214 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:31,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-24 01:18:31,214 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:31,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:31,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1475670698, now seen corresponding path program 19 times [2022-02-24 01:18:31,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:31,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950010848] [2022-02-24 01:18:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:31,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:31,221 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:31,221 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:31,221 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:32,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:32,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-24 01:18:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:32,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 01:18:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:32,322 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:32,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950010848] [2022-02-24 01:18:32,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [950010848] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:32,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:32,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:18:32,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702606694] [2022-02-24 01:18:32,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:32,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:18:32,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:32,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:18:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:18:32,324 INFO L87 Difference]: Start difference. First operand 1409 states and 1710 transitions. Second operand has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:18:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:35,930 INFO L93 Difference]: Finished difference Result 1443 states and 1747 transitions. [2022-02-24 01:18:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 01:18:35,930 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2022-02-24 01:18:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:35,932 INFO L225 Difference]: With dead ends: 1443 [2022-02-24 01:18:35,932 INFO L226 Difference]: Without dead ends: 1423 [2022-02-24 01:18:35,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=486, Invalid=4626, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 01:18:35,933 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 141 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:35,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 94 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:18:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-02-24 01:18:37,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1403. [2022-02-24 01:18:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1326 states have (on average 1.2088989441930618) internal successors, (1603), 1361 states have internal predecessors, (1603), 50 states have call successors, (50), 27 states have call predecessors, (50), 26 states have return successors, (48), 14 states have call predecessors, (48), 48 states have call successors, (48) [2022-02-24 01:18:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1701 transitions. [2022-02-24 01:18:37,948 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1701 transitions. Word has length 72 [2022-02-24 01:18:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:37,949 INFO L470 AbstractCegarLoop]: Abstraction has 1403 states and 1701 transitions. [2022-02-24 01:18:37,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:18:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1701 transitions. [2022-02-24 01:18:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 01:18:37,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:37,950 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:37,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-24 01:18:37,950 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:37,951 INFO L85 PathProgramCache]: Analyzing trace with hash -501669198, now seen corresponding path program 8 times [2022-02-24 01:18:37,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:37,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549974514] [2022-02-24 01:18:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:37,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:37,953 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:37,953 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:37,953 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:38,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:38,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-24 01:18:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:38,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 01:18:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:38,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 01:18:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:38,340 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:38,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549974514] [2022-02-24 01:18:38,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549974514] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:38,340 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:38,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:18:38,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053734391] [2022-02-24 01:18:38,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:38,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:18:38,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:38,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:18:38,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:18:38,341 INFO L87 Difference]: Start difference. First operand 1403 states and 1701 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:18:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:41,666 INFO L93 Difference]: Finished difference Result 1488 states and 1801 transitions. [2022-02-24 01:18:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:18:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 73 [2022-02-24 01:18:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:41,668 INFO L225 Difference]: With dead ends: 1488 [2022-02-24 01:18:41,668 INFO L226 Difference]: Without dead ends: 1486 [2022-02-24 01:18:41,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:18:41,668 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 172 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:41,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 110 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:18:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-02-24 01:18:43,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1465. [2022-02-24 01:18:43,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1374 states have (on average 1.2023289665211063) internal successors, (1652), 1414 states have internal predecessors, (1652), 63 states have call successors, (63), 28 states have call predecessors, (63), 27 states have return successors, (61), 22 states have call predecessors, (61), 61 states have call successors, (61) [2022-02-24 01:18:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 1776 transitions. [2022-02-24 01:18:43,965 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 1776 transitions. Word has length 73 [2022-02-24 01:18:43,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:43,965 INFO L470 AbstractCegarLoop]: Abstraction has 1465 states and 1776 transitions. [2022-02-24 01:18:43,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:18:43,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 1776 transitions. [2022-02-24 01:18:43,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 01:18:43,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:43,967 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:43,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-24 01:18:43,967 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:43,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:43,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1791898001, now seen corresponding path program 19 times [2022-02-24 01:18:43,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:43,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658587948] [2022-02-24 01:18:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:43,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:43,970 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:43,971 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:43,971 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:44,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:44,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 01:18:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:44,530 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:44,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658587948] [2022-02-24 01:18:44,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [658587948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:44,531 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:44,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:18:44,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240156688] [2022-02-24 01:18:44,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:44,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:18:44,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:44,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:18:44,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:18:44,531 INFO L87 Difference]: Start difference. First operand 1465 states and 1776 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:18:49,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:49,250 INFO L93 Difference]: Finished difference Result 1653 states and 2000 transitions. [2022-02-24 01:18:49,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 01:18:49,250 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-24 01:18:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:49,252 INFO L225 Difference]: With dead ends: 1653 [2022-02-24 01:18:49,252 INFO L226 Difference]: Without dead ends: 1651 [2022-02-24 01:18:49,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=549, Invalid=4421, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:18:49,253 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 338 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:49,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 118 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:18:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2022-02-24 01:18:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1490. [2022-02-24 01:18:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1396 states have (on average 1.2020057306590257) internal successors, (1678), 1439 states have internal predecessors, (1678), 66 states have call successors, (66), 28 states have call predecessors, (66), 27 states have return successors, (64), 22 states have call predecessors, (64), 64 states have call successors, (64) [2022-02-24 01:18:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 1808 transitions. [2022-02-24 01:18:51,661 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 1808 transitions. Word has length 71 [2022-02-24 01:18:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:51,661 INFO L470 AbstractCegarLoop]: Abstraction has 1490 states and 1808 transitions. [2022-02-24 01:18:51,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:18:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 1808 transitions. [2022-02-24 01:18:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 01:18:51,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:51,663 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:51,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-24 01:18:51,663 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:51,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2027609937, now seen corresponding path program 20 times [2022-02-24 01:18:51,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:51,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637031772] [2022-02-24 01:18:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:51,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:51,666 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:51,666 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:51,666 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:52,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:52,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 01:18:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:52,137 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:52,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637031772] [2022-02-24 01:18:52,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1637031772] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:52,137 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:52,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:18:52,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622326283] [2022-02-24 01:18:52,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:52,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:18:52,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:52,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:18:52,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:18:52,138 INFO L87 Difference]: Start difference. First operand 1490 states and 1808 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:18:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:59,627 INFO L93 Difference]: Finished difference Result 2107 states and 2584 transitions. [2022-02-24 01:18:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 01:18:59,628 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-24 01:18:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:59,631 INFO L225 Difference]: With dead ends: 2107 [2022-02-24 01:18:59,631 INFO L226 Difference]: Without dead ends: 2105 [2022-02-24 01:18:59,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 8 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=930, Invalid=8970, Unknown=0, NotChecked=0, Total=9900 [2022-02-24 01:18:59,632 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 570 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 3261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:59,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 135 Invalid, 3261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2765 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 01:18:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2022-02-24 01:19:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1702. [2022-02-24 01:19:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1596 states have (on average 1.2117794486215538) internal successors, (1934), 1648 states have internal predecessors, (1934), 77 states have call successors, (77), 29 states have call predecessors, (77), 28 states have return successors, (75), 24 states have call predecessors, (75), 75 states have call successors, (75) [2022-02-24 01:19:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2086 transitions. [2022-02-24 01:19:02,517 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2086 transitions. Word has length 71 [2022-02-24 01:19:02,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:02,517 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 2086 transitions. [2022-02-24 01:19:02,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:02,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2086 transitions. [2022-02-24 01:19:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 01:19:02,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:02,519 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:02,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-24 01:19:02,519 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:02,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash 952313571, now seen corresponding path program 21 times [2022-02-24 01:19:02,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:02,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083704586] [2022-02-24 01:19:02,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:02,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:02,523 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:02,523 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:02,523 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:02,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:02,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 01:19:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:02,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:02,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083704586] [2022-02-24 01:19:02,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1083704586] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:02,840 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:02,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:19:02,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670431553] [2022-02-24 01:19:02,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:02,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:19:02,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:19:02,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:19:02,840 INFO L87 Difference]: Start difference. First operand 1702 states and 2086 transitions. Second operand has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:07,286 INFO L93 Difference]: Finished difference Result 1840 states and 2253 transitions. [2022-02-24 01:19:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:19:07,286 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-24 01:19:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:07,288 INFO L225 Difference]: With dead ends: 1840 [2022-02-24 01:19:07,288 INFO L226 Difference]: Without dead ends: 1838 [2022-02-24 01:19:07,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=2333, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 01:19:07,289 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 153 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:07,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 118 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:19:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2022-02-24 01:19:10,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1664. [2022-02-24 01:19:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1561 states have (on average 1.2101217168481742) internal successors, (1889), 1609 states have internal predecessors, (1889), 73 states have call successors, (73), 30 states have call predecessors, (73), 29 states have return successors, (71), 24 states have call predecessors, (71), 71 states have call successors, (71) [2022-02-24 01:19:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2033 transitions. [2022-02-24 01:19:10,023 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2033 transitions. Word has length 71 [2022-02-24 01:19:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:10,023 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 2033 transitions. [2022-02-24 01:19:10,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:10,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2033 transitions. [2022-02-24 01:19:10,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 01:19:10,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:10,025 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:10,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-24 01:19:10,026 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:10,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:10,026 INFO L85 PathProgramCache]: Analyzing trace with hash -945381923, now seen corresponding path program 22 times [2022-02-24 01:19:10,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:10,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578436949] [2022-02-24 01:19:10,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:10,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:10,029 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:10,029 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:10,030 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:10,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:10,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 01:19:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:10,498 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:10,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578436949] [2022-02-24 01:19:10,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1578436949] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:10,499 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:10,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:19:10,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737957824] [2022-02-24 01:19:10,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:10,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:19:10,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:10,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:19:10,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:19:10,500 INFO L87 Difference]: Start difference. First operand 1664 states and 2033 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:15,229 INFO L93 Difference]: Finished difference Result 1774 states and 2167 transitions. [2022-02-24 01:19:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:19:15,230 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-24 01:19:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:15,232 INFO L225 Difference]: With dead ends: 1774 [2022-02-24 01:19:15,232 INFO L226 Difference]: Without dead ends: 1772 [2022-02-24 01:19:15,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=398, Invalid=3384, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 01:19:15,232 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 224 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:15,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 127 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:19:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2022-02-24 01:19:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1669. [2022-02-24 01:19:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1568 states have (on average 1.2123724489795917) internal successors, (1901), 1615 states have internal predecessors, (1901), 71 states have call successors, (71), 30 states have call predecessors, (71), 29 states have return successors, (69), 23 states have call predecessors, (69), 69 states have call successors, (69) [2022-02-24 01:19:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 2041 transitions. [2022-02-24 01:19:17,940 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 2041 transitions. Word has length 71 [2022-02-24 01:19:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:17,940 INFO L470 AbstractCegarLoop]: Abstraction has 1669 states and 2041 transitions. [2022-02-24 01:19:17,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 2041 transitions. [2022-02-24 01:19:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 01:19:17,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:17,942 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:17,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-24 01:19:17,942 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:17,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1767419357, now seen corresponding path program 23 times [2022-02-24 01:19:17,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:17,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386078692] [2022-02-24 01:19:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:17,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:17,946 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:17,946 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:17,946 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:18,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:18,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-24 01:19:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:18,367 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:18,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386078692] [2022-02-24 01:19:18,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1386078692] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:18,367 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:18,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:19:18,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888830457] [2022-02-24 01:19:18,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:18,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:19:18,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:18,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:19:18,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:19:18,368 INFO L87 Difference]: Start difference. First operand 1669 states and 2041 transitions. Second operand has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:22,774 INFO L93 Difference]: Finished difference Result 1774 states and 2163 transitions. [2022-02-24 01:19:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:19:22,775 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-24 01:19:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:22,777 INFO L225 Difference]: With dead ends: 1774 [2022-02-24 01:19:22,777 INFO L226 Difference]: Without dead ends: 1772 [2022-02-24 01:19:22,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=3059, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:19:22,778 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 153 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:22,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 117 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:19:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2022-02-24 01:19:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1669. [2022-02-24 01:19:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1568 states have (on average 1.2123724489795917) internal successors, (1901), 1615 states have internal predecessors, (1901), 71 states have call successors, (71), 30 states have call predecessors, (71), 29 states have return successors, (69), 23 states have call predecessors, (69), 69 states have call successors, (69) [2022-02-24 01:19:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 2041 transitions. [2022-02-24 01:19:25,523 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 2041 transitions. Word has length 71 [2022-02-24 01:19:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:25,524 INFO L470 AbstractCegarLoop]: Abstraction has 1669 states and 2041 transitions. [2022-02-24 01:19:25,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 2041 transitions. [2022-02-24 01:19:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:19:25,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:25,525 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:25,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-24 01:19:25,526 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:25,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2062115907, now seen corresponding path program 20 times [2022-02-24 01:19:25,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:25,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759667503] [2022-02-24 01:19:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:25,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:25,529 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:25,529 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:25,529 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:26,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:26,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 01:19:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:26,547 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:26,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759667503] [2022-02-24 01:19:26,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759667503] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:26,548 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:26,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:19:26,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187039567] [2022-02-24 01:19:26,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:26,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:19:26,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:26,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:19:26,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:19:26,549 INFO L87 Difference]: Start difference. First operand 1669 states and 2041 transitions. Second operand has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:34,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:34,458 INFO L93 Difference]: Finished difference Result 1912 states and 2334 transitions. [2022-02-24 01:19:34,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-24 01:19:34,458 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 01:19:34,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:34,461 INFO L225 Difference]: With dead ends: 1912 [2022-02-24 01:19:34,461 INFO L226 Difference]: Without dead ends: 1910 [2022-02-24 01:19:34,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5421 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1881, Invalid=13869, Unknown=0, NotChecked=0, Total=15750 [2022-02-24 01:19:34,462 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 340 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 3668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:34,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 133 Invalid, 3668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 3268 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 01:19:34,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-02-24 01:19:37,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1723. [2022-02-24 01:19:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1616 states have (on average 1.2097772277227723) internal successors, (1955), 1666 states have internal predecessors, (1955), 76 states have call successors, (76), 31 states have call predecessors, (76), 30 states have return successors, (74), 25 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-24 01:19:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2105 transitions. [2022-02-24 01:19:37,393 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2105 transitions. Word has length 72 [2022-02-24 01:19:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:37,394 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 2105 transitions. [2022-02-24 01:19:37,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2105 transitions. [2022-02-24 01:19:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:19:37,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:37,396 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:37,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-24 01:19:37,396 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:37,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1824795895, now seen corresponding path program 21 times [2022-02-24 01:19:37,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:37,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234046248] [2022-02-24 01:19:37,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:37,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:37,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:37,399 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:37,399 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:38,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:38,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 01:19:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:38,360 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:38,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234046248] [2022-02-24 01:19:38,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [234046248] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:38,360 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:38,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:19:38,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647036910] [2022-02-24 01:19:38,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:38,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:19:38,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:19:38,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:19:38,361 INFO L87 Difference]: Start difference. First operand 1723 states and 2105 transitions. Second operand has 37 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:45,935 INFO L93 Difference]: Finished difference Result 2020 states and 2476 transitions. [2022-02-24 01:19:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 01:19:45,936 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 01:19:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:45,938 INFO L225 Difference]: With dead ends: 2020 [2022-02-24 01:19:45,938 INFO L226 Difference]: Without dead ends: 2018 [2022-02-24 01:19:45,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1282, Invalid=7838, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 01:19:45,939 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 274 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:45,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 118 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 2364 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 01:19:45,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-02-24 01:19:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1767. [2022-02-24 01:19:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1657 states have (on average 1.2106216053108028) internal successors, (2006), 1708 states have internal predecessors, (2006), 78 states have call successors, (78), 32 states have call predecessors, (78), 31 states have return successors, (76), 26 states have call predecessors, (76), 76 states have call successors, (76) [2022-02-24 01:19:48,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 2160 transitions. [2022-02-24 01:19:48,974 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 2160 transitions. Word has length 72 [2022-02-24 01:19:48,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:48,975 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 2160 transitions. [2022-02-24 01:19:48,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:48,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 2160 transitions. [2022-02-24 01:19:48,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:19:48,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:48,976 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:48,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-24 01:19:48,977 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:48,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1689804415, now seen corresponding path program 22 times [2022-02-24 01:19:48,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:48,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144823149] [2022-02-24 01:19:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:48,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:48,980 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:48,980 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:48,980 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:49,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:49,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 01:19:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:49,814 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:49,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144823149] [2022-02-24 01:19:49,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144823149] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:49,814 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:49,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:19:49,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933761700] [2022-02-24 01:19:49,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:49,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:19:49,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:49,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:19:49,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:19:49,815 INFO L87 Difference]: Start difference. First operand 1767 states and 2160 transitions. Second operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:56,886 INFO L93 Difference]: Finished difference Result 1910 states and 2333 transitions. [2022-02-24 01:19:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-24 01:19:56,886 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 01:19:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:56,889 INFO L225 Difference]: With dead ends: 1910 [2022-02-24 01:19:56,889 INFO L226 Difference]: Without dead ends: 1908 [2022-02-24 01:19:56,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3240 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1123, Invalid=9383, Unknown=0, NotChecked=0, Total=10506 [2022-02-24 01:19:56,890 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 294 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 3118 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 3376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 3118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:56,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 132 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 3118 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 01:19:56,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2022-02-24 01:19:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1775. [2022-02-24 01:19:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1666 states have (on average 1.2112845138055222) internal successors, (2018), 1717 states have internal predecessors, (2018), 77 states have call successors, (77), 32 states have call predecessors, (77), 31 states have return successors, (75), 25 states have call predecessors, (75), 75 states have call successors, (75) [2022-02-24 01:19:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 2170 transitions. [2022-02-24 01:19:59,872 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 2170 transitions. Word has length 72 [2022-02-24 01:19:59,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:59,872 INFO L470 AbstractCegarLoop]: Abstraction has 1775 states and 2170 transitions. [2022-02-24 01:19:59,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:19:59,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 2170 transitions. [2022-02-24 01:19:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:19:59,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:59,875 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:59,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-24 01:19:59,875 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:59,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1751714111, now seen corresponding path program 23 times [2022-02-24 01:19:59,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:59,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630494042] [2022-02-24 01:19:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:59,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:59,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:59,879 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:59,879 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:00,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:01,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 01:20:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:01,002 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:01,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630494042] [2022-02-24 01:20:01,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [630494042] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:01,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:01,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 01:20:01,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798365806] [2022-02-24 01:20:01,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:01,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 01:20:01,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:01,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 01:20:01,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 01:20:01,003 INFO L87 Difference]: Start difference. First operand 1775 states and 2170 transitions. Second operand has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:20:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:07,457 INFO L93 Difference]: Finished difference Result 1853 states and 2265 transitions. [2022-02-24 01:20:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 01:20:07,458 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 01:20:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:07,460 INFO L225 Difference]: With dead ends: 1853 [2022-02-24 01:20:07,460 INFO L226 Difference]: Without dead ends: 1851 [2022-02-24 01:20:07,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1046, Invalid=8074, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 01:20:07,461 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 316 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:07,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 101 Invalid, 2729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:20:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2022-02-24 01:20:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1786. [2022-02-24 01:20:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1674 states have (on average 1.2102747909199523) internal successors, (2026), 1726 states have internal predecessors, (2026), 79 states have call successors, (79), 33 states have call predecessors, (79), 32 states have return successors, (77), 26 states have call predecessors, (77), 77 states have call successors, (77) [2022-02-24 01:20:10,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2182 transitions. [2022-02-24 01:20:10,493 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2182 transitions. Word has length 72 [2022-02-24 01:20:10,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:10,493 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 2182 transitions. [2022-02-24 01:20:10,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:20:10,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2182 transitions. [2022-02-24 01:20:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:20:10,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:10,496 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:10,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-24 01:20:10,496 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:10,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2091436369, now seen corresponding path program 24 times [2022-02-24 01:20:10,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:10,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017341809] [2022-02-24 01:20:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:10,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:10,501 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:10,501 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:10,501 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:11,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:11,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 01:20:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:11,426 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:11,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017341809] [2022-02-24 01:20:11,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017341809] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:11,427 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:11,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:20:11,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281942491] [2022-02-24 01:20:11,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:11,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:20:11,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:11,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:20:11,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:20:11,428 INFO L87 Difference]: Start difference. First operand 1786 states and 2182 transitions. Second operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:20:19,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:19,256 INFO L93 Difference]: Finished difference Result 2010 states and 2448 transitions. [2022-02-24 01:20:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 01:20:19,257 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 01:20:19,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:19,259 INFO L225 Difference]: With dead ends: 2010 [2022-02-24 01:20:19,259 INFO L226 Difference]: Without dead ends: 2008 [2022-02-24 01:20:19,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4413 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1186, Invalid=11924, Unknown=0, NotChecked=0, Total=13110 [2022-02-24 01:20:19,260 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 278 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 4428 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 4694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 4428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:19,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 111 Invalid, 4694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 4428 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 01:20:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2022-02-24 01:20:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1695. [2022-02-24 01:20:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1591 states have (on average 1.2099308610936519) internal successors, (1925), 1638 states have internal predecessors, (1925), 72 states have call successors, (72), 32 states have call predecessors, (72), 31 states have return successors, (70), 24 states have call predecessors, (70), 70 states have call successors, (70) [2022-02-24 01:20:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2067 transitions. [2022-02-24 01:20:22,088 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2067 transitions. Word has length 72 [2022-02-24 01:20:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:22,088 INFO L470 AbstractCegarLoop]: Abstraction has 1695 states and 2067 transitions. [2022-02-24 01:20:22,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:20:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2067 transitions. [2022-02-24 01:20:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:20:22,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:22,090 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:22,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-24 01:20:22,090 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:22,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1311069383, now seen corresponding path program 25 times [2022-02-24 01:20:22,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:22,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462622642] [2022-02-24 01:20:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:22,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:22,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:22,094 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:22,094 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:23,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:23,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-24 01:20:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:23,061 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:23,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462622642] [2022-02-24 01:20:23,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462622642] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:23,062 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:23,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:20:23,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207188284] [2022-02-24 01:20:23,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:23,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:20:23,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:23,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:20:23,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:20:23,063 INFO L87 Difference]: Start difference. First operand 1695 states and 2067 transitions. Second operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:20:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:30,029 INFO L93 Difference]: Finished difference Result 1847 states and 2250 transitions. [2022-02-24 01:20:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 01:20:30,030 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-24 01:20:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:30,032 INFO L225 Difference]: With dead ends: 1847 [2022-02-24 01:20:30,032 INFO L226 Difference]: Without dead ends: 1845 [2022-02-24 01:20:30,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3362 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1012, Invalid=9290, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 01:20:30,033 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 253 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3596 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 3806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 3596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:30,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 132 Invalid, 3806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 3596 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 01:20:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2022-02-24 01:20:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1695. [2022-02-24 01:20:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1591 states have (on average 1.2099308610936519) internal successors, (1925), 1638 states have internal predecessors, (1925), 72 states have call successors, (72), 32 states have call predecessors, (72), 31 states have return successors, (70), 24 states have call predecessors, (70), 70 states have call successors, (70) [2022-02-24 01:20:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2067 transitions. [2022-02-24 01:20:32,897 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2067 transitions. Word has length 72 [2022-02-24 01:20:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:32,897 INFO L470 AbstractCegarLoop]: Abstraction has 1695 states and 2067 transitions. [2022-02-24 01:20:32,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:20:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2067 transitions. [2022-02-24 01:20:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 01:20:32,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:32,899 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:32,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-24 01:20:32,899 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:32,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:32,899 INFO L85 PathProgramCache]: Analyzing trace with hash 935343017, now seen corresponding path program 9 times [2022-02-24 01:20:32,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:32,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371588250] [2022-02-24 01:20:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:32,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:32,902 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:32,902 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:32,903 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:33,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:33,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-24 01:20:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:33,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-24 01:20:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:33,481 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:33,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371588250] [2022-02-24 01:20:33,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [371588250] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:33,481 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:33,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:20:33,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769652568] [2022-02-24 01:20:33,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:33,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:20:33,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:33,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:20:33,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:20:33,482 INFO L87 Difference]: Start difference. First operand 1695 states and 2067 transitions. Second operand has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:20:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:40,403 INFO L93 Difference]: Finished difference Result 2158 states and 2647 transitions. [2022-02-24 01:20:40,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 01:20:40,403 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 73 [2022-02-24 01:20:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:40,406 INFO L225 Difference]: With dead ends: 2158 [2022-02-24 01:20:40,406 INFO L226 Difference]: Without dead ends: 2156 [2022-02-24 01:20:40,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1811 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=930, Invalid=5712, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 01:20:40,407 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 544 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:40,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 86 Invalid, 2138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:20:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2022-02-24 01:20:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1875. [2022-02-24 01:20:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1754 states have (on average 1.2126567844925884) internal successors, (2127), 1809 states have internal predecessors, (2127), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 31 states have call predecessors, (85), 85 states have call successors, (85) [2022-02-24 01:20:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2299 transitions. [2022-02-24 01:20:43,755 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2299 transitions. Word has length 73 [2022-02-24 01:20:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:43,755 INFO L470 AbstractCegarLoop]: Abstraction has 1875 states and 2299 transitions. [2022-02-24 01:20:43,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:20:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2299 transitions. [2022-02-24 01:20:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:20:43,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:43,757 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:43,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-24 01:20:43,757 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:43,757 INFO L85 PathProgramCache]: Analyzing trace with hash 218298293, now seen corresponding path program 24 times [2022-02-24 01:20:43,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:43,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570539998] [2022-02-24 01:20:43,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:43,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:43,761 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:43,761 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:43,761 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:44,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:44,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 01:20:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:44,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 01:20:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:44,408 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:44,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570539998] [2022-02-24 01:20:44,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [570539998] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:44,408 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:44,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:20:44,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368470058] [2022-02-24 01:20:44,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:44,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:20:44,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:20:44,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:20:44,409 INFO L87 Difference]: Start difference. First operand 1875 states and 2299 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:20:49,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:49,921 INFO L93 Difference]: Finished difference Result 2006 states and 2456 transitions. [2022-02-24 01:20:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 01:20:49,922 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2022-02-24 01:20:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:49,924 INFO L225 Difference]: With dead ends: 2006 [2022-02-24 01:20:49,924 INFO L226 Difference]: Without dead ends: 2004 [2022-02-24 01:20:49,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=462, Invalid=4368, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 01:20:49,925 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 265 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:49,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 116 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:20:49,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2022-02-24 01:20:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1893. [2022-02-24 01:20:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1772 states have (on average 1.2133182844243793) internal successors, (2150), 1827 states have internal predecessors, (2150), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 31 states have call predecessors, (85), 85 states have call successors, (85) [2022-02-24 01:20:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2322 transitions. [2022-02-24 01:20:53,284 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2322 transitions. Word has length 74 [2022-02-24 01:20:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:53,284 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 2322 transitions. [2022-02-24 01:20:53,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:20:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2322 transitions. [2022-02-24 01:20:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:20:53,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:53,286 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:53,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-02-24 01:20:53,287 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:53,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:53,287 INFO L85 PathProgramCache]: Analyzing trace with hash 231121153, now seen corresponding path program 25 times [2022-02-24 01:20:53,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:53,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653820658] [2022-02-24 01:20:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:53,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:53,290 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:53,290 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:53,290 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:53,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:53,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-24 01:20:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:53,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 01:20:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:53,980 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:53,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653820658] [2022-02-24 01:20:53,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [653820658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:53,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:53,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:20:53,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360973066] [2022-02-24 01:20:53,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:53,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:20:53,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:53,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:20:53,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:20:53,981 INFO L87 Difference]: Start difference. First operand 1893 states and 2322 transitions. Second operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:20:59,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:59,468 INFO L93 Difference]: Finished difference Result 1957 states and 2398 transitions. [2022-02-24 01:20:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 01:20:59,468 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2022-02-24 01:20:59,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:59,470 INFO L225 Difference]: With dead ends: 1957 [2022-02-24 01:20:59,470 INFO L226 Difference]: Without dead ends: 1955 [2022-02-24 01:20:59,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=627, Invalid=4629, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 01:20:59,471 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 238 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:59,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 103 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1850 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:20:59,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-02-24 01:21:02,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1893. [2022-02-24 01:21:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1772 states have (on average 1.2133182844243793) internal successors, (2150), 1827 states have internal predecessors, (2150), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 31 states have call predecessors, (85), 85 states have call successors, (85) [2022-02-24 01:21:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2322 transitions. [2022-02-24 01:21:02,871 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2322 transitions. Word has length 74 [2022-02-24 01:21:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:02,871 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 2322 transitions. [2022-02-24 01:21:02,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:21:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2322 transitions. [2022-02-24 01:21:02,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:21:02,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:02,876 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:02,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-02-24 01:21:02,877 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:02,877 INFO L85 PathProgramCache]: Analyzing trace with hash 726069085, now seen corresponding path program 31 times [2022-02-24 01:21:02,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:02,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398433639] [2022-02-24 01:21:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:02,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:02,882 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:02,883 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:02,883 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:03,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:03,088 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:03,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398433639] [2022-02-24 01:21:03,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398433639] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:03,088 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:03,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:21:03,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946468920] [2022-02-24 01:21:03,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:03,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:21:03,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:03,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:21:03,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:21:03,089 INFO L87 Difference]: Start difference. First operand 1893 states and 2322 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:09,506 INFO L93 Difference]: Finished difference Result 3550 states and 4431 transitions. [2022-02-24 01:21:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:21:09,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:21:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:09,510 INFO L225 Difference]: With dead ends: 3550 [2022-02-24 01:21:09,510 INFO L226 Difference]: Without dead ends: 2952 [2022-02-24 01:21:09,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 01:21:09,512 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 493 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:09,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 112 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:21:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2022-02-24 01:21:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2495. [2022-02-24 01:21:13,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2374 states have (on average 1.2207245155855098) internal successors, (2898), 2429 states have internal predecessors, (2898), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 31 states have call predecessors, (85), 85 states have call successors, (85) [2022-02-24 01:21:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 3070 transitions. [2022-02-24 01:21:13,702 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 3070 transitions. Word has length 72 [2022-02-24 01:21:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:13,702 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 3070 transitions. [2022-02-24 01:21:13,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 3070 transitions. [2022-02-24 01:21:13,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:21:13,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:13,705 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:13,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-02-24 01:21:13,705 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:13,705 INFO L85 PathProgramCache]: Analyzing trace with hash -919244112, now seen corresponding path program 32 times [2022-02-24 01:21:13,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:13,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480904143] [2022-02-24 01:21:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:13,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:13,708 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:13,709 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:13,709 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:13,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:13,791 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:13,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480904143] [2022-02-24 01:21:13,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [480904143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:13,792 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:13,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:21:13,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651490107] [2022-02-24 01:21:13,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:13,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:21:13,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:13,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:21:13,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:21:13,792 INFO L87 Difference]: Start difference. First operand 2495 states and 3070 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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) [2022-02-24 01:21:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:20,393 INFO L93 Difference]: Finished difference Result 2887 states and 3562 transitions. [2022-02-24 01:21:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 01:21:20,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 72 [2022-02-24 01:21:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:20,397 INFO L225 Difference]: With dead ends: 2887 [2022-02-24 01:21:20,397 INFO L226 Difference]: Without dead ends: 2848 [2022-02-24 01:21:20,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=830, Invalid=1822, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 01:21:20,398 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 226 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:20,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 74 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:21:20,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2022-02-24 01:21:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2496. [2022-02-24 01:21:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2375 states have (on average 1.2197894736842105) internal successors, (2897), 2430 states have internal predecessors, (2897), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 31 states have call predecessors, (85), 85 states have call successors, (85) [2022-02-24 01:21:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3069 transitions. [2022-02-24 01:21:24,667 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3069 transitions. Word has length 72 [2022-02-24 01:21:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:24,667 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 3069 transitions. [2022-02-24 01:21:24,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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) [2022-02-24 01:21:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3069 transitions. [2022-02-24 01:21:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:21:24,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:24,670 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:24,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-02-24 01:21:24,670 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:24,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:24,670 INFO L85 PathProgramCache]: Analyzing trace with hash -218179534, now seen corresponding path program 28 times [2022-02-24 01:21:24,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:24,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136096535] [2022-02-24 01:21:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:24,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:24,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:24,674 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:24,674 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:25,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:25,020 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:25,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136096535] [2022-02-24 01:21:25,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136096535] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:25,020 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:25,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:21:25,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519874707] [2022-02-24 01:21:25,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:25,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:21:25,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:25,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:21:25,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:21:25,021 INFO L87 Difference]: Start difference. First operand 2496 states and 3069 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:37,151 INFO L93 Difference]: Finished difference Result 3257 states and 4006 transitions. [2022-02-24 01:21:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-02-24 01:21:37,151 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:21:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:37,155 INFO L225 Difference]: With dead ends: 3257 [2022-02-24 01:21:37,155 INFO L226 Difference]: Without dead ends: 3255 [2022-02-24 01:21:37,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9846 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2688, Invalid=23072, Unknown=0, NotChecked=0, Total=25760 [2022-02-24 01:21:37,157 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 549 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 3953 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 4521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 3953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:37,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 113 Invalid, 4521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 3953 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 01:21:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-02-24 01:21:41,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2680. [2022-02-24 01:21:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2540 states have (on average 1.2188976377952756) internal successors, (3096), 2608 states have internal predecessors, (3096), 100 states have call successors, (100), 40 states have call predecessors, (100), 39 states have return successors, (98), 31 states have call predecessors, (98), 98 states have call successors, (98) [2022-02-24 01:21:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 3294 transitions. [2022-02-24 01:21:41,868 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 3294 transitions. Word has length 72 [2022-02-24 01:21:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:41,868 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 3294 transitions. [2022-02-24 01:21:41,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:41,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 3294 transitions. [2022-02-24 01:21:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 01:21:41,871 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:41,872 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:41,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-02-24 01:21:41,877 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:41,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1382753881, now seen corresponding path program 26 times [2022-02-24 01:21:41,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:41,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133913546] [2022-02-24 01:21:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:41,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:41,886 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:41,886 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:41,886 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:43,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:43,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-24 01:21:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:43,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-24 01:21:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:43,010 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:43,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133913546] [2022-02-24 01:21:43,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [133913546] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:43,011 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:43,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-24 01:21:43,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232404125] [2022-02-24 01:21:43,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:43,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-24 01:21:43,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-24 01:21:43,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 01:21:43,013 INFO L87 Difference]: Start difference. First operand 2680 states and 3294 transitions. Second operand has 40 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:21:49,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:49,936 INFO L93 Difference]: Finished difference Result 2731 states and 3350 transitions. [2022-02-24 01:21:49,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 01:21:49,936 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2022-02-24 01:21:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:49,940 INFO L225 Difference]: With dead ends: 2731 [2022-02-24 01:21:49,940 INFO L226 Difference]: Without dead ends: 2668 [2022-02-24 01:21:49,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2656 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=755, Invalid=7255, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 01:21:49,941 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 175 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:49,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 87 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:21:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2022-02-24 01:21:54,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2587. [2022-02-24 01:21:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2452 states have (on average 1.2226753670473083) internal successors, (2998), 2519 states have internal predecessors, (2998), 97 states have call successors, (97), 38 states have call predecessors, (97), 37 states have return successors, (96), 29 states have call predecessors, (96), 96 states have call successors, (96) [2022-02-24 01:21:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 3191 transitions. [2022-02-24 01:21:54,543 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 3191 transitions. Word has length 75 [2022-02-24 01:21:54,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:54,543 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 3191 transitions. [2022-02-24 01:21:54,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:21:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 3191 transitions. [2022-02-24 01:21:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:21:54,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:54,546 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:54,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-02-24 01:21:54,546 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:54,546 INFO L85 PathProgramCache]: Analyzing trace with hash 139638767, now seen corresponding path program 26 times [2022-02-24 01:21:54,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:54,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991884163] [2022-02-24 01:21:54,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:54,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:54,550 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:54,550 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:54,550 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:54,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:54,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-24 01:21:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:54,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-24 01:21:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:54,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-24 01:21:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:54,881 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:54,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991884163] [2022-02-24 01:21:54,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [991884163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:54,881 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:54,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:21:54,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152772537] [2022-02-24 01:21:54,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:54,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:21:54,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:54,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:21:54,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:21:54,882 INFO L87 Difference]: Start difference. First operand 2587 states and 3191 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:22:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:00,705 INFO L93 Difference]: Finished difference Result 2705 states and 3335 transitions. [2022-02-24 01:22:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:22:00,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 76 [2022-02-24 01:22:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:00,708 INFO L225 Difference]: With dead ends: 2705 [2022-02-24 01:22:00,709 INFO L226 Difference]: Without dead ends: 2703 [2022-02-24 01:22:00,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=1578, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:22:00,709 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 187 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:00,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 105 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:22:00,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2022-02-24 01:22:05,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2633. [2022-02-24 01:22:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2633 states, 2492 states have (on average 1.2215088282504012) internal successors, (3044), 2563 states have internal predecessors, (3044), 103 states have call successors, (103), 38 states have call predecessors, (103), 37 states have return successors, (102), 31 states have call predecessors, (102), 102 states have call successors, (102) [2022-02-24 01:22:05,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 3249 transitions. [2022-02-24 01:22:05,417 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 3249 transitions. Word has length 76 [2022-02-24 01:22:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:05,417 INFO L470 AbstractCegarLoop]: Abstraction has 2633 states and 3249 transitions. [2022-02-24 01:22:05,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 01:22:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 3249 transitions. [2022-02-24 01:22:05,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:22:05,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:05,420 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:22:05,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-02-24 01:22:05,420 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:05,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:05,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1192708310, now seen corresponding path program 27 times [2022-02-24 01:22:05,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:05,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485224256] [2022-02-24 01:22:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:05,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:05,423 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:05,423 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:05,423 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:05,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:05,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 01:22:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:05,799 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:05,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485224256] [2022-02-24 01:22:05,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [485224256] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:05,799 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:05,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:22:05,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470330043] [2022-02-24 01:22:05,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:05,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:22:05,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:05,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:22:05,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:22:05,800 INFO L87 Difference]: Start difference. First operand 2633 states and 3249 transitions. Second operand has 27 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:22:15,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:15,696 INFO L93 Difference]: Finished difference Result 3223 states and 3971 transitions. [2022-02-24 01:22:15,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-24 01:22:15,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-24 01:22:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:15,700 INFO L225 Difference]: With dead ends: 3223 [2022-02-24 01:22:15,700 INFO L226 Difference]: Without dead ends: 3221 [2022-02-24 01:22:15,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3738 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=845, Invalid=10285, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 01:22:15,701 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 471 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 3202 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 3610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 3202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:15,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 140 Invalid, 3610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 3202 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 01:22:15,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3221 states. [2022-02-24 01:22:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3221 to 2743. [2022-02-24 01:22:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2743 states, 2590 states have (on average 1.2204633204633204) internal successors, (3161), 2665 states have internal predecessors, (3161), 111 states have call successors, (111), 42 states have call predecessors, (111), 41 states have return successors, (110), 35 states have call predecessors, (110), 110 states have call successors, (110) [2022-02-24 01:22:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 3382 transitions. [2022-02-24 01:22:20,749 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 3382 transitions. Word has length 74 [2022-02-24 01:22:20,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:20,749 INFO L470 AbstractCegarLoop]: Abstraction has 2743 states and 3382 transitions. [2022-02-24 01:22:20,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:22:20,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 3382 transitions. [2022-02-24 01:22:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:22:20,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:20,752 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:22:20,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-02-24 01:22:20,752 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1837502160, now seen corresponding path program 28 times [2022-02-24 01:22:20,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:20,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324725421] [2022-02-24 01:22:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:20,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:20,756 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:20,756 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:20,756 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:21,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:21,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 01:22:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:21,216 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:21,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324725421] [2022-02-24 01:22:21,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [324725421] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:21,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:21,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:22:21,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439065312] [2022-02-24 01:22:21,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:21,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:22:21,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:22:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:22:21,217 INFO L87 Difference]: Start difference. First operand 2743 states and 3382 transitions. Second operand has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:22:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:31,044 INFO L93 Difference]: Finished difference Result 3054 states and 3759 transitions. [2022-02-24 01:22:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 01:22:31,045 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-24 01:22:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:31,049 INFO L225 Difference]: With dead ends: 3054 [2022-02-24 01:22:31,049 INFO L226 Difference]: Without dead ends: 3052 [2022-02-24 01:22:31,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1074, Invalid=8432, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 01:22:31,049 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 375 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 3093 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 3093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:31,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 133 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 3093 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 01:22:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2022-02-24 01:22:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2795. [2022-02-24 01:22:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2635 states have (on average 1.220493358633776) internal successors, (3216), 2713 states have internal predecessors, (3216), 116 states have call successors, (116), 44 states have call predecessors, (116), 43 states have return successors, (115), 37 states have call predecessors, (115), 115 states have call successors, (115) [2022-02-24 01:22:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 3447 transitions. [2022-02-24 01:22:36,410 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 3447 transitions. Word has length 74 [2022-02-24 01:22:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:36,410 INFO L470 AbstractCegarLoop]: Abstraction has 2795 states and 3447 transitions. [2022-02-24 01:22:36,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:22:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 3447 transitions. [2022-02-24 01:22:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:22:36,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:36,413 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:22:36,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-02-24 01:22:36,414 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:36,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:36,414 INFO L85 PathProgramCache]: Analyzing trace with hash -344034646, now seen corresponding path program 29 times [2022-02-24 01:22:36,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:36,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723911372] [2022-02-24 01:22:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:36,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:36,418 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:36,418 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:36,418 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:36,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:36,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 01:22:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:36,796 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:36,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723911372] [2022-02-24 01:22:36,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [723911372] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:36,796 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:36,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:22:36,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835877001] [2022-02-24 01:22:36,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:36,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:22:36,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:36,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:22:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:22:36,797 INFO L87 Difference]: Start difference. First operand 2795 states and 3447 transitions. Second operand has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:22:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:44,379 INFO L93 Difference]: Finished difference Result 2948 states and 3630 transitions. [2022-02-24 01:22:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:22:44,379 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-24 01:22:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:44,382 INFO L225 Difference]: With dead ends: 2948 [2022-02-24 01:22:44,383 INFO L226 Difference]: Without dead ends: 2946 [2022-02-24 01:22:44,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=387, Invalid=3035, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:22:44,383 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 293 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:44,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 146 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:22:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2022-02-24 01:22:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2810. [2022-02-24 01:22:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 2650 states have (on average 1.221132075471698) internal successors, (3236), 2728 states have internal predecessors, (3236), 116 states have call successors, (116), 44 states have call predecessors, (116), 43 states have return successors, (115), 37 states have call predecessors, (115), 115 states have call successors, (115) [2022-02-24 01:22:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 3467 transitions. [2022-02-24 01:22:49,625 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 3467 transitions. Word has length 74 [2022-02-24 01:22:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:49,625 INFO L470 AbstractCegarLoop]: Abstraction has 2810 states and 3467 transitions. [2022-02-24 01:22:49,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:22:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 3467 transitions. [2022-02-24 01:22:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:22:49,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:49,628 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:22:49,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-02-24 01:22:49,628 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:49,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:49,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1166072080, now seen corresponding path program 30 times [2022-02-24 01:22:49,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:49,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413105108] [2022-02-24 01:22:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:49,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:49,631 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:49,631 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:49,631 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:50,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:50,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 01:22:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:50,132 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:50,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413105108] [2022-02-24 01:22:50,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [413105108] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:50,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:50,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:22:50,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996118404] [2022-02-24 01:22:50,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:50,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:22:50,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:50,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:22:50,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:22:50,133 INFO L87 Difference]: Start difference. First operand 2810 states and 3467 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:22:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:57,913 INFO L93 Difference]: Finished difference Result 2959 states and 3641 transitions. [2022-02-24 01:22:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 01:22:57,913 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-24 01:22:57,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:57,916 INFO L225 Difference]: With dead ends: 2959 [2022-02-24 01:22:57,917 INFO L226 Difference]: Without dead ends: 2957 [2022-02-24 01:22:57,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=512, Invalid=3778, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 01:22:57,917 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 286 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 2504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:57,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 130 Invalid, 2504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:22:57,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-02-24 01:23:03,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2809. [2022-02-24 01:23:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2650 states have (on average 1.221509433962264) internal successors, (3237), 2728 states have internal predecessors, (3237), 115 states have call successors, (115), 44 states have call predecessors, (115), 43 states have return successors, (114), 36 states have call predecessors, (114), 114 states have call successors, (114) [2022-02-24 01:23:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 3466 transitions. [2022-02-24 01:23:03,156 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 3466 transitions. Word has length 74 [2022-02-24 01:23:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:03,156 INFO L470 AbstractCegarLoop]: Abstraction has 2809 states and 3466 transitions. [2022-02-24 01:23:03,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:23:03,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 3466 transitions. [2022-02-24 01:23:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:23:03,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:03,159 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:03,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-02-24 01:23:03,159 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:03,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1614776572, now seen corresponding path program 31 times [2022-02-24 01:23:03,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:03,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790510521] [2022-02-24 01:23:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:03,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:03,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:03,162 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:03,163 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:03,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:03,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 01:23:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:03,720 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:03,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790510521] [2022-02-24 01:23:03,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1790510521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:03,720 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:03,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:23:03,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554588714] [2022-02-24 01:23:03,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:03,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:23:03,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:23:03,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:23:03,721 INFO L87 Difference]: Start difference. First operand 2809 states and 3466 transitions. Second operand has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:23:11,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:11,749 INFO L93 Difference]: Finished difference Result 2995 states and 3685 transitions. [2022-02-24 01:23:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 01:23:11,749 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-24 01:23:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:11,753 INFO L225 Difference]: With dead ends: 2995 [2022-02-24 01:23:11,753 INFO L226 Difference]: Without dead ends: 2993 [2022-02-24 01:23:11,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=496, Invalid=5510, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 01:23:11,753 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 244 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:11,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 141 Invalid, 2963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2811 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:23:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-02-24 01:23:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2815. [2022-02-24 01:23:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2656 states have (on average 1.2217620481927711) internal successors, (3245), 2734 states have internal predecessors, (3245), 115 states have call successors, (115), 44 states have call predecessors, (115), 43 states have return successors, (114), 36 states have call predecessors, (114), 114 states have call successors, (114) [2022-02-24 01:23:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 3474 transitions. [2022-02-24 01:23:17,062 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 3474 transitions. Word has length 74 [2022-02-24 01:23:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:17,062 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 3474 transitions. [2022-02-24 01:23:17,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:23:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 3474 transitions. [2022-02-24 01:23:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:23:17,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:17,065 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:17,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-02-24 01:23:17,065 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1089485352, now seen corresponding path program 27 times [2022-02-24 01:23:17,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:17,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172768682] [2022-02-24 01:23:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:17,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:17,068 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:17,068 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:17,068 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:18,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:18,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 01:23:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:18,012 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:18,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172768682] [2022-02-24 01:23:18,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172768682] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:18,012 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:18,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:23:18,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813178751] [2022-02-24 01:23:18,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:18,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:23:18,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:18,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:23:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:23:18,013 INFO L87 Difference]: Start difference. First operand 2815 states and 3474 transitions. Second operand has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:23:27,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:27,026 INFO L93 Difference]: Finished difference Result 2974 states and 3663 transitions. [2022-02-24 01:23:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 01:23:27,027 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-24 01:23:27,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:27,030 INFO L225 Difference]: With dead ends: 2974 [2022-02-24 01:23:27,030 INFO L226 Difference]: Without dead ends: 2972 [2022-02-24 01:23:27,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2743 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=951, Invalid=8361, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 01:23:27,031 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 225 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:27,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 124 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:23:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2022-02-24 01:23:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2830. [2022-02-24 01:23:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2830 states, 2670 states have (on average 1.2217228464419476) internal successors, (3262), 2749 states have internal predecessors, (3262), 116 states have call successors, (116), 44 states have call predecessors, (116), 43 states have return successors, (115), 36 states have call predecessors, (115), 115 states have call successors, (115) [2022-02-24 01:23:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 3493 transitions. [2022-02-24 01:23:32,395 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 3493 transitions. Word has length 74 [2022-02-24 01:23:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:32,395 INFO L470 AbstractCegarLoop]: Abstraction has 2830 states and 3493 transitions. [2022-02-24 01:23:32,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:23:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 3493 transitions. [2022-02-24 01:23:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:23:32,398 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:32,398 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:32,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-02-24 01:23:32,398 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash 267447918, now seen corresponding path program 28 times [2022-02-24 01:23:32,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:32,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826774479] [2022-02-24 01:23:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:32,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:32,401 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:32,401 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:32,401 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:33,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:33,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-24 01:23:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:33,235 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:33,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826774479] [2022-02-24 01:23:33,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [826774479] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:33,235 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:33,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:23:33,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684120362] [2022-02-24 01:23:33,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:33,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:23:33,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:33,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:23:33,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:23:33,236 INFO L87 Difference]: Start difference. First operand 2830 states and 3493 transitions. Second operand has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:23:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:42,339 INFO L93 Difference]: Finished difference Result 3047 states and 3753 transitions. [2022-02-24 01:23:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 01:23:42,340 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-24 01:23:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:42,343 INFO L225 Difference]: With dead ends: 3047 [2022-02-24 01:23:42,343 INFO L226 Difference]: Without dead ends: 3045 [2022-02-24 01:23:42,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3284 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=996, Invalid=9510, Unknown=0, NotChecked=0, Total=10506 [2022-02-24 01:23:42,344 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 278 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:42,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 125 Invalid, 2798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2541 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:23:42,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2022-02-24 01:23:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2832. [2022-02-24 01:23:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2674 states have (on average 1.2228870605833957) internal successors, (3270), 2752 states have internal predecessors, (3270), 114 states have call successors, (114), 44 states have call predecessors, (114), 43 states have return successors, (113), 35 states have call predecessors, (113), 113 states have call successors, (113) [2022-02-24 01:23:47,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3497 transitions. [2022-02-24 01:23:47,698 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3497 transitions. Word has length 74 [2022-02-24 01:23:47,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:47,698 INFO L470 AbstractCegarLoop]: Abstraction has 2832 states and 3497 transitions. [2022-02-24 01:23:47,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:23:47,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3497 transitions. [2022-02-24 01:23:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 01:23:47,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:47,701 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:47,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-02-24 01:23:47,701 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:47,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1570581088, now seen corresponding path program 29 times [2022-02-24 01:23:47,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:47,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241281246] [2022-02-24 01:23:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:47,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:47,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:47,704 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:47,704 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:48,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:48,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-24 01:23:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:48,754 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:48,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241281246] [2022-02-24 01:23:48,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241281246] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:48,754 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:48,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 01:23:48,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345400923] [2022-02-24 01:23:48,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:48,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 01:23:48,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:48,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 01:23:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 01:23:48,755 INFO L87 Difference]: Start difference. First operand 2832 states and 3497 transitions. Second operand has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:23:58,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:58,174 INFO L93 Difference]: Finished difference Result 2984 states and 3682 transitions. [2022-02-24 01:23:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 01:23:58,174 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-02-24 01:23:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:58,178 INFO L225 Difference]: With dead ends: 2984 [2022-02-24 01:23:58,178 INFO L226 Difference]: Without dead ends: 2982 [2022-02-24 01:23:58,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2687 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1275, Invalid=8037, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 01:23:58,179 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 282 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:58,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 107 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:23:58,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2022-02-24 01:24:03,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2862. [2022-02-24 01:24:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2703 states have (on average 1.222345541990381) internal successors, (3304), 2782 states have internal predecessors, (3304), 115 states have call successors, (115), 44 states have call predecessors, (115), 43 states have return successors, (114), 35 states have call predecessors, (114), 114 states have call successors, (114) [2022-02-24 01:24:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 3533 transitions. [2022-02-24 01:24:03,638 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 3533 transitions. Word has length 75 [2022-02-24 01:24:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:24:03,639 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 3533 transitions. [2022-02-24 01:24:03,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:24:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 3533 transitions. [2022-02-24 01:24:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 01:24:03,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:24:03,641 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:24:03,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-02-24 01:24:03,641 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:24:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:24:03,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1100612134, now seen corresponding path program 30 times [2022-02-24 01:24:03,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:24:03,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903038117] [2022-02-24 01:24:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:24:03,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:24:03,645 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:24:03,645 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:24:03,645 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:24:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:04,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:24:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:04,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-24 01:24:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:24:04,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:24:04,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903038117] [2022-02-24 01:24:04,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1903038117] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:24:04,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:24:04,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:24:04,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628263202] [2022-02-24 01:24:04,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:24:04,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:24:04,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:24:04,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:24:04,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:24:04,677 INFO L87 Difference]: Start difference. First operand 2862 states and 3533 transitions. Second operand has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:24:15,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:24:15,186 INFO L93 Difference]: Finished difference Result 3117 states and 3834 transitions. [2022-02-24 01:24:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 01:24:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-02-24 01:24:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:24:15,191 INFO L225 Difference]: With dead ends: 3117 [2022-02-24 01:24:15,191 INFO L226 Difference]: Without dead ends: 3115 [2022-02-24 01:24:15,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3840 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1098, Invalid=11112, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 01:24:15,192 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 278 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 3944 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 4217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 3944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:24:15,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 156 Invalid, 4217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 3944 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 01:24:15,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-02-24 01:24:20,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2837. [2022-02-24 01:24:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2679 states have (on average 1.2228443449048152) internal successors, (3276), 2755 states have internal predecessors, (3276), 112 states have call successors, (112), 46 states have call predecessors, (112), 45 states have return successors, (111), 35 states have call predecessors, (111), 111 states have call successors, (111) [2022-02-24 01:24:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 3499 transitions. [2022-02-24 01:24:20,597 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 3499 transitions. Word has length 75 [2022-02-24 01:24:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:24:20,597 INFO L470 AbstractCegarLoop]: Abstraction has 2837 states and 3499 transitions. [2022-02-24 01:24:20,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:24:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 3499 transitions. [2022-02-24 01:24:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 01:24:20,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:24:20,600 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:24:20,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-02-24 01:24:20,600 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:24:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:24:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1589949918, now seen corresponding path program 31 times [2022-02-24 01:24:20,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:24:20,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258881244] [2022-02-24 01:24:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:24:20,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:24:20,604 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:24:20,604 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:24:20,604 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:24:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:21,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:24:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:21,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-24 01:24:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:24:21,532 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:24:21,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258881244] [2022-02-24 01:24:21,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [258881244] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:24:21,533 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:24:21,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:24:21,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044110418] [2022-02-24 01:24:21,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:24:21,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:24:21,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:24:21,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:24:21,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:24:21,534 INFO L87 Difference]: Start difference. First operand 2837 states and 3499 transitions. Second operand has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:24:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:24:31,921 INFO L93 Difference]: Finished difference Result 3017 states and 3717 transitions. [2022-02-24 01:24:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 01:24:31,921 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-02-24 01:24:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:24:31,925 INFO L225 Difference]: With dead ends: 3017 [2022-02-24 01:24:31,925 INFO L226 Difference]: Without dead ends: 3015 [2022-02-24 01:24:31,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1513, Invalid=10697, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 01:24:31,926 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 285 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 3457 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 3774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 3457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:24:31,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 134 Invalid, 3774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 3457 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 01:24:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2022-02-24 01:24:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 2827. [2022-02-24 01:24:37,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2671 states have (on average 1.2235117933358293) internal successors, (3268), 2746 states have internal predecessors, (3268), 110 states have call successors, (110), 46 states have call predecessors, (110), 45 states have return successors, (109), 34 states have call predecessors, (109), 109 states have call successors, (109) [2022-02-24 01:24:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 3487 transitions. [2022-02-24 01:24:37,221 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 3487 transitions. Word has length 75 [2022-02-24 01:24:37,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:24:37,222 INFO L470 AbstractCegarLoop]: Abstraction has 2827 states and 3487 transitions. [2022-02-24 01:24:37,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:24:37,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 3487 transitions. [2022-02-24 01:24:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 01:24:37,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:24:37,224 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:24:37,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-02-24 01:24:37,224 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:24:37,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:24:37,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1924650392, now seen corresponding path program 32 times [2022-02-24 01:24:37,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:24:37,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133561259] [2022-02-24 01:24:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:24:37,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:24:37,229 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:24:37,229 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:24:37,229 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:24:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:38,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:24:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:38,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-24 01:24:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:24:38,276 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:24:38,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133561259] [2022-02-24 01:24:38,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [133561259] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:24:38,277 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:24:38,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:24:38,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223123232] [2022-02-24 01:24:38,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:24:38,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:24:38,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:24:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:24:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:24:38,278 INFO L87 Difference]: Start difference. First operand 2827 states and 3487 transitions. Second operand has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:24:46,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:24:46,554 INFO L93 Difference]: Finished difference Result 2935 states and 3617 transitions. [2022-02-24 01:24:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 01:24:46,555 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-02-24 01:24:46,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:24:46,558 INFO L225 Difference]: With dead ends: 2935 [2022-02-24 01:24:46,558 INFO L226 Difference]: Without dead ends: 2933 [2022-02-24 01:24:46,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=887, Invalid=6595, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 01:24:46,559 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 221 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:24:46,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 103 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2097 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:24:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2022-02-24 01:24:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2802. [2022-02-24 01:24:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2648 states have (on average 1.2235649546827794) internal successors, (3240), 2722 states have internal predecessors, (3240), 108 states have call successors, (108), 46 states have call predecessors, (108), 45 states have return successors, (107), 33 states have call predecessors, (107), 107 states have call successors, (107) [2022-02-24 01:24:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 3455 transitions. [2022-02-24 01:24:51,778 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 3455 transitions. Word has length 75 [2022-02-24 01:24:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:24:51,778 INFO L470 AbstractCegarLoop]: Abstraction has 2802 states and 3455 transitions. [2022-02-24 01:24:51,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:24:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 3455 transitions. [2022-02-24 01:24:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:24:51,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:24:51,781 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:24:51,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-02-24 01:24:51,781 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:24:51,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:24:51,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1231018404, now seen corresponding path program 32 times [2022-02-24 01:24:51,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:24:51,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699528113] [2022-02-24 01:24:51,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:24:51,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:24:51,785 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:24:51,785 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:24:51,785 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:24:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:52,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:24:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:52,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-24 01:24:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:52,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-24 01:24:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:24:52,285 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:24:52,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699528113] [2022-02-24 01:24:52,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [699528113] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:24:52,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:24:52,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:24:52,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565705335] [2022-02-24 01:24:52,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:24:52,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:24:52,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:24:52,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:24:52,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:24:52,286 INFO L87 Difference]: Start difference. First operand 2802 states and 3455 transitions. Second operand has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:25:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:25:00,004 INFO L93 Difference]: Finished difference Result 3000 states and 3695 transitions. [2022-02-24 01:25:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:25:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 76 [2022-02-24 01:25:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:25:00,009 INFO L225 Difference]: With dead ends: 3000 [2022-02-24 01:25:00,009 INFO L226 Difference]: Without dead ends: 2998 [2022-02-24 01:25:00,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=404, Invalid=3018, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:25:00,009 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 217 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:25:00,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 78 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:25:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states.