/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 02:47:08,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 02:47:08,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 02:47:08,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 02:47:08,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 02:47:08,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 02:47:08,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 02:47:08,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 02:47:08,439 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 02:47:08,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 02:47:08,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 02:47:08,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 02:47:08,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 02:47:08,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 02:47:08,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 02:47:08,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 02:47:08,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 02:47:08,442 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 02:47:08,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 02:47:08,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 02:47:08,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 02:47:08,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 02:47:08,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 02:47:08,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:47:08,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 02:47:08,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 02:47:08,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 02:47:08,443 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 02:47:08,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 02:47:08,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 02:47:08,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 02:47:08,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 02:47:08,732 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 02:47:08,732 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 02:47:08,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2022-02-24 02:47:08,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/878429be9/a850b90c4fea4d72b4fb81e9cf75aeb4/FLAGd0d183b79 [2022-02-24 02:47:09,216 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 02:47:09,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2022-02-24 02:47:09,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/878429be9/a850b90c4fea4d72b4fb81e9cf75aeb4/FLAGd0d183b79 [2022-02-24 02:47:09,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/878429be9/a850b90c4fea4d72b4fb81e9cf75aeb4 [2022-02-24 02:47:09,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 02:47:09,254 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 02:47:09,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 02:47:09,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 02:47:09,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 02:47:09,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:47:09" (1/1) ... [2022-02-24 02:47:09,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee886a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:09, skipping insertion in model container [2022-02-24 02:47:09,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:47:09" (1/1) ... [2022-02-24 02:47:09,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 02:47:09,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 02:47:09,460 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/vogal-1.i[895,908] [2022-02-24 02:47:09,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:47:09,516 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 02:47:09,528 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/vogal-1.i[895,908] [2022-02-24 02:47:09,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:47:09,573 INFO L208 MainTranslator]: Completed translation [2022-02-24 02:47:09,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:09 WrapperNode [2022-02-24 02:47:09,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 02:47:09,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 02:47:09,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 02:47:09,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 02:47:09,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:09" (1/1) ... [2022-02-24 02:47:09,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:09" (1/1) ... [2022-02-24 02:47:09,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:09" (1/1) ... [2022-02-24 02:47:09,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:09" (1/1) ... [2022-02-24 02:47:09,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:09" (1/1) ... [2022-02-24 02:47:09,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:09" (1/1) ... [2022-02-24 02:47:09,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:09" (1/1) ... [2022-02-24 02:47:09,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 02:47:09,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 02:47:09,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 02:47:09,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 02:47:09,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:09" (1/1) ... [2022-02-24 02:47:09,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:47:09,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 02:47:09,657 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 02:47:09,681 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 02:47:09,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 02:47:09,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 02:47:09,704 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 02:47:09,704 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 02:47:09,704 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 02:47:09,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 02:47:09,704 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 02:47:09,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 02:47:09,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 02:47:09,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 02:47:09,705 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 02:47:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 02:47:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 02:47:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 02:47:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-24 02:47:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 02:47:09,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 02:47:09,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 02:47:09,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 02:47:09,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 02:47:09,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 02:47:09,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 02:47:09,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 02:47:09,792 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 02:47:09,794 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 02:47:10,016 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 02:47:10,022 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 02:47:10,022 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-02-24 02:47:10,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:47:10 BoogieIcfgContainer [2022-02-24 02:47:10,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 02:47:10,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 02:47:10,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 02:47:10,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 02:47:10,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 02:47:09" (1/3) ... [2022-02-24 02:47:10,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a40d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:47:10, skipping insertion in model container [2022-02-24 02:47:10,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:47:09" (2/3) ... [2022-02-24 02:47:10,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a40d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:47:10, skipping insertion in model container [2022-02-24 02:47:10,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:47:10" (3/3) ... [2022-02-24 02:47:10,033 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-02-24 02:47:10,038 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 02:47:10,038 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 02:47:10,082 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 02:47:10,089 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=QVASR [2022-02-24 02:47:10,089 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 02:47:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 02:47:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 02:47:10,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:10,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:10,121 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:10,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:10,126 INFO L85 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 1 times [2022-02-24 02:47:10,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:10,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853475922] [2022-02-24 02:47:10,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:10,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:10,196 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:47:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:10,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:10,382 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 02:47:10,383 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:10,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853475922] [2022-02-24 02:47:10,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1853475922] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:10,385 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:10,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 02:47:10,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230685595] [2022-02-24 02:47:10,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:10,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 02:47:10,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:10,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 02:47:10,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 02:47:10,422 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:10,482 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2022-02-24 02:47:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 02:47:10,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 02:47:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:10,492 INFO L225 Difference]: With dead ends: 66 [2022-02-24 02:47:10,493 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 02:47:10,496 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 02:47:10,500 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 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 02:47:10,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:47:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 02:47:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-24 02:47:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-02-24 02:47:10,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2022-02-24 02:47:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:10,547 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-02-24 02:47:10,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-02-24 02:47:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 02:47:10,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:10,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:10,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 02:47:10,549 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:10,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:10,549 INFO L85 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 1 times [2022-02-24 02:47:10,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:10,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817408621] [2022-02-24 02:47:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:10,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:10,552 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:47:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:10,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:10,660 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 02:47:10,661 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:10,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817408621] [2022-02-24 02:47:10,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817408621] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:10,661 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:10,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 02:47:10,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172839711] [2022-02-24 02:47:10,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:10,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 02:47:10,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 02:47:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 02:47:10,664 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:10,790 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-02-24 02:47:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 02:47:10,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 02:47:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:10,793 INFO L225 Difference]: With dead ends: 67 [2022-02-24 02:47:10,793 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 02:47:10,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:47:10,795 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:10,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:10,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 02:47:10,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-02-24 02:47:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:10,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-02-24 02:47:10,808 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2022-02-24 02:47:10,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:10,809 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-02-24 02:47:10,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-02-24 02:47:10,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 02:47:10,811 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:10,812 INFO L514 BasicCegarLoop]: trace histogram [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 02:47:10,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 02:47:10,813 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:10,817 INFO L85 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 1 times [2022-02-24 02:47:10,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:10,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635879440] [2022-02-24 02:47:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:10,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:10,830 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:10,831 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:10,966 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 02:47:10,966 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:10,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635879440] [2022-02-24 02:47:10,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [635879440] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:10,967 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:10,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 02:47:10,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422124684] [2022-02-24 02:47:10,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:10,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 02:47:10,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 02:47:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:47:10,970 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:11,166 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2022-02-24 02:47:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 02:47:11,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 02:47:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:11,168 INFO L225 Difference]: With dead ends: 82 [2022-02-24 02:47:11,168 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 02:47:11,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:47:11,170 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:11,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 02:47:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2022-02-24 02:47:11,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-02-24 02:47:11,182 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2022-02-24 02:47:11,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:11,182 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-02-24 02:47:11,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-02-24 02:47:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 02:47:11,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:11,183 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] [2022-02-24 02:47:11,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 02:47:11,184 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:11,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:11,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2027956876, now seen corresponding path program 2 times [2022-02-24 02:47:11,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:11,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131258897] [2022-02-24 02:47:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:11,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:11,189 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:11,189 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,322 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 02:47:11,323 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:11,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131258897] [2022-02-24 02:47:11,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2131258897] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:11,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:11,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:47:11,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597639876] [2022-02-24 02:47:11,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:11,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:47:11,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:11,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:47:11,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:47:11,325 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:11,566 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-02-24 02:47:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 02:47:11,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 02:47:11,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:11,571 INFO L225 Difference]: With dead ends: 97 [2022-02-24 02:47:11,571 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 02:47:11,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:47:11,575 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 130 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:11,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 57 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 02:47:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 35. [2022-02-24 02:47:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-02-24 02:47:11,591 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 24 [2022-02-24 02:47:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:11,591 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-02-24 02:47:11,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-02-24 02:47:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 02:47:11,593 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:11,594 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:11,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 02:47:11,594 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1706217130, now seen corresponding path program 3 times [2022-02-24 02:47:11,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:11,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101833765] [2022-02-24 02:47:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:11,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:11,600 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:11,600 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:11,717 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 02:47:11,717 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:11,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101833765] [2022-02-24 02:47:11,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2101833765] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:11,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:11,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:47:11,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030809546] [2022-02-24 02:47:11,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:11,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:47:11,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:11,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:47:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:47:11,719 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:11,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:11,977 INFO L93 Difference]: Finished difference Result 112 states and 150 transitions. [2022-02-24 02:47:11,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:47:11,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 02:47:11,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:11,979 INFO L225 Difference]: With dead ends: 112 [2022-02-24 02:47:11,980 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 02:47:11,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:47:11,988 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 193 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:11,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 64 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 02:47:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 37. [2022-02-24 02:47:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-02-24 02:47:12,004 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 26 [2022-02-24 02:47:12,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:12,005 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-02-24 02:47:12,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-02-24 02:47:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 02:47:12,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:12,006 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:12,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 02:47:12,006 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:12,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1751966536, now seen corresponding path program 4 times [2022-02-24 02:47:12,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:12,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151178075] [2022-02-24 02:47:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:12,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:12,010 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:12,010 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:12,187 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:12,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151178075] [2022-02-24 02:47:12,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151178075] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:12,188 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:12,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:47:12,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161051739] [2022-02-24 02:47:12,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:12,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:47:12,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:47:12,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:47:12,189 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 02:47:12,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:12,540 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-02-24 02:47:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:47:12,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 02:47:12,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:12,542 INFO L225 Difference]: With dead ends: 127 [2022-02-24 02:47:12,542 INFO L226 Difference]: Without dead ends: 105 [2022-02-24 02:47:12,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:12,544 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 256 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:12,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 71 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:12,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-24 02:47:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 39. [2022-02-24 02:47:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-02-24 02:47:12,564 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 28 [2022-02-24 02:47:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:12,565 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-02-24 02:47:12,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 02:47:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-02-24 02:47:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 02:47:12,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:12,566 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:12,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 02:47:12,567 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:12,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1527494554, now seen corresponding path program 5 times [2022-02-24 02:47:12,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:12,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693131088] [2022-02-24 02:47:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:12,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:12,570 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:12,571 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,698 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 02:47:12,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:12,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693131088] [2022-02-24 02:47:12,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693131088] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:12,699 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:12,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:47:12,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322374836] [2022-02-24 02:47:12,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:12,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:47:12,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:47:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:47:12,701 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:12,847 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-02-24 02:47:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:47:12,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 02:47:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:12,848 INFO L225 Difference]: With dead ends: 63 [2022-02-24 02:47:12,848 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 02:47:12,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:47:12,853 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:12,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 58 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 02:47:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-02-24 02:47:12,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-02-24 02:47:12,883 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 30 [2022-02-24 02:47:12,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:12,884 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-02-24 02:47:12,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:12,885 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-02-24 02:47:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 02:47:12,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:12,892 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 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 02:47:12,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 02:47:12,892 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:12,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash 810905395, now seen corresponding path program 1 times [2022-02-24 02:47:12,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:12,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139135760] [2022-02-24 02:47:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:12,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:12,898 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:12,898 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:12,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:13,006 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:13,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139135760] [2022-02-24 02:47:13,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2139135760] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:13,007 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:13,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 02:47:13,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207171190] [2022-02-24 02:47:13,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:13,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 02:47:13,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:13,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 02:47:13,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:47:13,010 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 02:47:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:13,111 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2022-02-24 02:47:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 02:47:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 36 [2022-02-24 02:47:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:13,112 INFO L225 Difference]: With dead ends: 104 [2022-02-24 02:47:13,112 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 02:47:13,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:47:13,113 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:13,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 45 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:13,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 02:47:13,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2022-02-24 02:47:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2022-02-24 02:47:13,140 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 36 [2022-02-24 02:47:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:13,141 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2022-02-24 02:47:13,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 02:47:13,141 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2022-02-24 02:47:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 02:47:13,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:13,142 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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 02:47:13,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 02:47:13,142 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:13,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1464313968, now seen corresponding path program 2 times [2022-02-24 02:47:13,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:13,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674036784] [2022-02-24 02:47:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:13,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:13,149 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:13,151 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:13,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:13,282 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 02:47:13,283 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:13,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674036784] [2022-02-24 02:47:13,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [674036784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:13,283 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:13,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 02:47:13,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056693775] [2022-02-24 02:47:13,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:13,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 02:47:13,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:13,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 02:47:13,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:47:13,285 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 02:47:13,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:13,410 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2022-02-24 02:47:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 02:47:13,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 39 [2022-02-24 02:47:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:13,411 INFO L225 Difference]: With dead ends: 154 [2022-02-24 02:47:13,411 INFO L226 Difference]: Without dead ends: 109 [2022-02-24 02:47:13,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:47:13,414 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:13,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 38 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:13,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-24 02:47:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2022-02-24 02:47:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-02-24 02:47:13,448 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 39 [2022-02-24 02:47:13,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:13,448 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-02-24 02:47:13,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 02:47:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-02-24 02:47:13,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 02:47:13,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:13,450 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-02-24 02:47:13,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 02:47:13,451 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:13,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2131958580, now seen corresponding path program 1 times [2022-02-24 02:47:13,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:13,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039730554] [2022-02-24 02:47:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:13,456 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:13,456 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:13,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:13,868 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:13,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039730554] [2022-02-24 02:47:13,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1039730554] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:13,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:13,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:47:13,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445711216] [2022-02-24 02:47:13,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:13,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:47:13,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:47:13,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:47:13,870 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:14,208 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2022-02-24 02:47:14,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:47:14,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 02:47:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:14,209 INFO L225 Difference]: With dead ends: 90 [2022-02-24 02:47:14,209 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 02:47:14,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:14,211 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 85 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:14,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 48 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 02:47:14,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-02-24 02:47:14,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 69 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:14,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-02-24 02:47:14,241 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 40 [2022-02-24 02:47:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:14,243 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-02-24 02:47:14,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:14,243 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-02-24 02:47:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 02:47:14,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:14,244 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1] [2022-02-24 02:47:14,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 02:47:14,245 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:14,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1769981706, now seen corresponding path program 1 times [2022-02-24 02:47:14,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:14,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990179084] [2022-02-24 02:47:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:14,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:14,249 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:14,249 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,471 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 02:47:14,471 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:14,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990179084] [2022-02-24 02:47:14,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1990179084] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:14,471 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:14,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:47:14,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670083778] [2022-02-24 02:47:14,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:14,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:47:14,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:14,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:47:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:47:14,473 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:14,672 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2022-02-24 02:47:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:47:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 02:47:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:14,673 INFO L225 Difference]: With dead ends: 105 [2022-02-24 02:47:14,673 INFO L226 Difference]: Without dead ends: 72 [2022-02-24 02:47:14,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:14,674 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:14,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-24 02:47:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-02-24 02:47:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-02-24 02:47:14,702 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 40 [2022-02-24 02:47:14,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:14,703 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-02-24 02:47:14,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-02-24 02:47:14,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 02:47:14,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:14,703 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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 02:47:14,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 02:47:14,704 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2076492661, now seen corresponding path program 1 times [2022-02-24 02:47:14,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:14,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275162409] [2022-02-24 02:47:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:14,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:14,707 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:14,707 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:14,981 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 02:47:14,982 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:14,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275162409] [2022-02-24 02:47:14,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [275162409] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:14,982 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:14,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:47:14,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085351340] [2022-02-24 02:47:14,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:14,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:47:14,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:14,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:47:14,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:47:14,983 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:15,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:15,319 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2022-02-24 02:47:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:47:15,323 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 02:47:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:15,324 INFO L225 Difference]: With dead ends: 104 [2022-02-24 02:47:15,324 INFO L226 Difference]: Without dead ends: 76 [2022-02-24 02:47:15,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:15,326 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 87 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:15,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 48 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:15,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-24 02:47:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-02-24 02:47:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2022-02-24 02:47:15,357 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 41 [2022-02-24 02:47:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:15,358 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2022-02-24 02:47:15,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2022-02-24 02:47:15,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 02:47:15,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:15,358 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2022-02-24 02:47:15,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 02:47:15,359 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:15,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1960309197, now seen corresponding path program 1 times [2022-02-24 02:47:15,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:15,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556161218] [2022-02-24 02:47:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:15,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:15,362 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:15,363 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:15,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:15,962 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 02:47:15,963 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:15,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556161218] [2022-02-24 02:47:15,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [556161218] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:15,963 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:15,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:47:15,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113261701] [2022-02-24 02:47:15,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:15,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:47:15,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:47:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:15,965 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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 02:47:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:17,225 INFO L93 Difference]: Finished difference Result 276 states and 354 transitions. [2022-02-24 02:47:17,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:47:17,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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 41 [2022-02-24 02:47:17,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:17,230 INFO L225 Difference]: With dead ends: 276 [2022-02-24 02:47:17,230 INFO L226 Difference]: Without dead ends: 245 [2022-02-24 02:47:17,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=352, Invalid=980, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 02:47:17,235 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 377 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:17,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 62 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-24 02:47:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 124. [2022-02-24 02:47:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2941176470588236) internal successors, (154), 119 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:17,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-02-24 02:47:17,287 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 41 [2022-02-24 02:47:17,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:17,288 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-02-24 02:47:17,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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 02:47:17,288 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-02-24 02:47:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 02:47:17,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:17,289 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2022-02-24 02:47:17,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 02:47:17,289 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:17,289 INFO L85 PathProgramCache]: Analyzing trace with hash 796628983, now seen corresponding path program 2 times [2022-02-24 02:47:17,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:17,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116281272] [2022-02-24 02:47:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:17,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:17,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:17,293 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:17,482 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:17,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116281272] [2022-02-24 02:47:17,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116281272] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:17,482 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:17,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:47:17,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100363360] [2022-02-24 02:47:17,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:17,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:47:17,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:17,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:47:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:47:17,484 INFO L87 Difference]: Start difference. First operand 124 states and 158 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 02:47:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:17,724 INFO L93 Difference]: Finished difference Result 190 states and 244 transitions. [2022-02-24 02:47:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:47:17,725 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 41 [2022-02-24 02:47:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:17,726 INFO L225 Difference]: With dead ends: 190 [2022-02-24 02:47:17,726 INFO L226 Difference]: Without dead ends: 185 [2022-02-24 02:47:17,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:47:17,726 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 116 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:17,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 38 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-24 02:47:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 108. [2022-02-24 02:47:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.2815533980582525) internal successors, (132), 103 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 136 transitions. [2022-02-24 02:47:17,774 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 136 transitions. Word has length 41 [2022-02-24 02:47:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:17,774 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 136 transitions. [2022-02-24 02:47:17,774 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 02:47:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 136 transitions. [2022-02-24 02:47:17,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 02:47:17,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:17,775 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1] [2022-02-24 02:47:17,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 02:47:17,776 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:17,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:17,776 INFO L85 PathProgramCache]: Analyzing trace with hash -727315291, now seen corresponding path program 1 times [2022-02-24 02:47:17,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:17,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211048683] [2022-02-24 02:47:17,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:17,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:17,779 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:17,779 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:17,845 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 02:47:17,845 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:17,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211048683] [2022-02-24 02:47:17,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [211048683] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:17,845 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:17,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:47:17,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875195510] [2022-02-24 02:47:17,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:17,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:47:17,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:17,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:47:17,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:47:17,846 INFO L87 Difference]: Start difference. First operand 108 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 02:47:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:18,188 INFO L93 Difference]: Finished difference Result 295 states and 378 transitions. [2022-02-24 02:47:18,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:47:18,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 42 [2022-02-24 02:47:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:18,190 INFO L225 Difference]: With dead ends: 295 [2022-02-24 02:47:18,190 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 02:47:18,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:47:18,192 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 147 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:18,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 57 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:18,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 02:47:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 113. [2022-02-24 02:47:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.2777777777777777) internal successors, (138), 108 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 142 transitions. [2022-02-24 02:47:18,249 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 142 transitions. Word has length 42 [2022-02-24 02:47:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:18,250 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 142 transitions. [2022-02-24 02:47:18,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 02:47:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 142 transitions. [2022-02-24 02:47:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 02:47:18,251 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:18,251 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 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 02:47:18,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 02:47:18,251 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:18,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:18,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1280661403, now seen corresponding path program 2 times [2022-02-24 02:47:18,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:18,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868573883] [2022-02-24 02:47:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:18,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:18,257 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:18,257 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:18,355 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:18,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868573883] [2022-02-24 02:47:18,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1868573883] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:18,356 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:18,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:47:18,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570828064] [2022-02-24 02:47:18,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:18,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:47:18,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:47:18,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:47:18,357 INFO L87 Difference]: Start difference. First operand 113 states and 142 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 02:47:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:18,814 INFO L93 Difference]: Finished difference Result 308 states and 393 transitions. [2022-02-24 02:47:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:47:18,814 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 46 [2022-02-24 02:47:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:18,816 INFO L225 Difference]: With dead ends: 308 [2022-02-24 02:47:18,816 INFO L226 Difference]: Without dead ends: 279 [2022-02-24 02:47:18,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:18,817 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 132 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:18,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 105 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-24 02:47:18,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 115. [2022-02-24 02:47:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.2818181818181817) internal successors, (141), 110 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 145 transitions. [2022-02-24 02:47:18,865 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 145 transitions. Word has length 46 [2022-02-24 02:47:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:18,865 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 145 transitions. [2022-02-24 02:47:18,865 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 02:47:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 145 transitions. [2022-02-24 02:47:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 02:47:18,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:18,866 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 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 02:47:18,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 02:47:18,867 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:18,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1482276086, now seen corresponding path program 3 times [2022-02-24 02:47:18,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:18,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112041523] [2022-02-24 02:47:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:18,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:18,870 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:18,871 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:18,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:19,001 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:19,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112041523] [2022-02-24 02:47:19,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112041523] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:19,001 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:19,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:47:19,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675993571] [2022-02-24 02:47:19,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:19,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:47:19,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:19,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:47:19,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:47:19,003 INFO L87 Difference]: Start difference. First operand 115 states and 145 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:19,642 INFO L93 Difference]: Finished difference Result 361 states and 462 transitions. [2022-02-24 02:47:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:47:19,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 02:47:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:19,645 INFO L225 Difference]: With dead ends: 361 [2022-02-24 02:47:19,645 INFO L226 Difference]: Without dead ends: 332 [2022-02-24 02:47:19,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:47:19,646 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 162 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:19,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 129 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:19,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-24 02:47:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 117. [2022-02-24 02:47:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.2857142857142858) internal successors, (144), 112 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 148 transitions. [2022-02-24 02:47:19,699 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 148 transitions. Word has length 48 [2022-02-24 02:47:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:19,699 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 148 transitions. [2022-02-24 02:47:19,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 148 transitions. [2022-02-24 02:47:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 02:47:19,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:19,700 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 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 02:47:19,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 02:47:19,700 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:19,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1960458129, now seen corresponding path program 4 times [2022-02-24 02:47:19,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:19,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204372376] [2022-02-24 02:47:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:19,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:19,704 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:19,704 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:19,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:19,809 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:19,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204372376] [2022-02-24 02:47:19,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [204372376] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:19,810 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:19,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:47:19,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175594865] [2022-02-24 02:47:19,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:19,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:47:19,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:19,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:47:19,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:47:19,811 INFO L87 Difference]: Start difference. First operand 117 states and 148 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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 02:47:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:20,454 INFO L93 Difference]: Finished difference Result 414 states and 531 transitions. [2022-02-24 02:47:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:47:20,455 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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 50 [2022-02-24 02:47:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:20,457 INFO L225 Difference]: With dead ends: 414 [2022-02-24 02:47:20,457 INFO L226 Difference]: Without dead ends: 385 [2022-02-24 02:47:20,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:47:20,458 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 217 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:20,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 136 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-02-24 02:47:20,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 119. [2022-02-24 02:47:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.2894736842105263) internal successors, (147), 114 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 151 transitions. [2022-02-24 02:47:20,513 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 151 transitions. Word has length 50 [2022-02-24 02:47:20,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:20,513 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 151 transitions. [2022-02-24 02:47:20,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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 02:47:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 151 transitions. [2022-02-24 02:47:20,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 02:47:20,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:20,514 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 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, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:20,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 02:47:20,514 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:20,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash -145264029, now seen corresponding path program 1 times [2022-02-24 02:47:20,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:20,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089807277] [2022-02-24 02:47:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:20,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:20,518 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:20,518 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:20,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:20,647 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 02:47:20,647 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:20,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089807277] [2022-02-24 02:47:20,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089807277] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:20,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:20,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:47:20,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141172228] [2022-02-24 02:47:20,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:20,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:47:20,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:20,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:47:20,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:47:20,649 INFO L87 Difference]: Start difference. First operand 119 states and 151 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 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 02:47:20,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:20,993 INFO L93 Difference]: Finished difference Result 210 states and 268 transitions. [2022-02-24 02:47:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:47:20,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 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 51 [2022-02-24 02:47:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:20,995 INFO L225 Difference]: With dead ends: 210 [2022-02-24 02:47:20,995 INFO L226 Difference]: Without dead ends: 205 [2022-02-24 02:47:20,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:47:20,996 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 127 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:20,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 90 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:20,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-24 02:47:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 164. [2022-02-24 02:47:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.3018867924528301) internal successors, (207), 159 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 211 transitions. [2022-02-24 02:47:21,080 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 211 transitions. Word has length 51 [2022-02-24 02:47:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:21,080 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 211 transitions. [2022-02-24 02:47:21,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 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 02:47:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 211 transitions. [2022-02-24 02:47:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 02:47:21,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:21,081 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:21,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 02:47:21,081 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:21,082 INFO L85 PathProgramCache]: Analyzing trace with hash -732070043, now seen corresponding path program 1 times [2022-02-24 02:47:21,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:21,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643729978] [2022-02-24 02:47:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:21,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:21,084 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:21,085 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:21,697 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 02:47:21,697 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:21,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643729978] [2022-02-24 02:47:21,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [643729978] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:21,697 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:21,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:47:21,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906034972] [2022-02-24 02:47:21,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:21,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:47:21,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:47:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:47:21,699 INFO L87 Difference]: Start difference. First operand 164 states and 211 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 02:47:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:22,608 INFO L93 Difference]: Finished difference Result 427 states and 550 transitions. [2022-02-24 02:47:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:47:22,609 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 51 [2022-02-24 02:47:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:22,610 INFO L225 Difference]: With dead ends: 427 [2022-02-24 02:47:22,611 INFO L226 Difference]: Without dead ends: 386 [2022-02-24 02:47:22,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:47:22,612 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 249 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:22,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 50 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-02-24 02:47:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 201. [2022-02-24 02:47:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.2959183673469388) internal successors, (254), 196 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 258 transitions. [2022-02-24 02:47:22,737 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 258 transitions. Word has length 51 [2022-02-24 02:47:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:22,737 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 258 transitions. [2022-02-24 02:47:22,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 02:47:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 258 transitions. [2022-02-24 02:47:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 02:47:22,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:22,738 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:22,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 02:47:22,738 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash -810376151, now seen corresponding path program 2 times [2022-02-24 02:47:22,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:22,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527110826] [2022-02-24 02:47:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:22,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:22,742 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:22,742 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:23,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:23,340 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 02:47:23,340 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:23,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527110826] [2022-02-24 02:47:23,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1527110826] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:23,341 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:23,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:47:23,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143451987] [2022-02-24 02:47:23,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:23,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:47:23,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:23,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:47:23,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:47:23,342 INFO L87 Difference]: Start difference. First operand 201 states and 258 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:24,818 INFO L93 Difference]: Finished difference Result 568 states and 732 transitions. [2022-02-24 02:47:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 02:47:24,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 02:47:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:24,820 INFO L225 Difference]: With dead ends: 568 [2022-02-24 02:47:24,820 INFO L226 Difference]: Without dead ends: 473 [2022-02-24 02:47:24,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=1371, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:47:24,823 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 234 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:24,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 80 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:47:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-02-24 02:47:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 259. [2022-02-24 02:47:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.2992125984251968) internal successors, (330), 254 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 334 transitions. [2022-02-24 02:47:24,936 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 334 transitions. Word has length 51 [2022-02-24 02:47:24,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:24,936 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 334 transitions. [2022-02-24 02:47:24,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:24,937 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 334 transitions. [2022-02-24 02:47:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 02:47:24,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:24,938 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:24,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 02:47:24,938 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:24,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:24,938 INFO L85 PathProgramCache]: Analyzing trace with hash -4715419, now seen corresponding path program 1 times [2022-02-24 02:47:24,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:24,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915398176] [2022-02-24 02:47:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:24,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:24,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:24,941 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:25,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:25,317 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 02:47:25,317 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:25,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915398176] [2022-02-24 02:47:25,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [915398176] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:25,317 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:25,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:47:25,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498923448] [2022-02-24 02:47:25,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:25,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:47:25,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:25,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:47:25,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:47:25,318 INFO L87 Difference]: Start difference. First operand 259 states and 334 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 02:47:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:25,844 INFO L93 Difference]: Finished difference Result 446 states and 582 transitions. [2022-02-24 02:47:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:47:25,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 51 [2022-02-24 02:47:25,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:25,847 INFO L225 Difference]: With dead ends: 446 [2022-02-24 02:47:25,847 INFO L226 Difference]: Without dead ends: 387 [2022-02-24 02:47:25,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:47:25,849 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 135 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:25,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 48 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:25,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-02-24 02:47:25,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 270. [2022-02-24 02:47:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.2792452830188679) internal successors, (339), 265 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 343 transitions. [2022-02-24 02:47:25,986 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 343 transitions. Word has length 51 [2022-02-24 02:47:25,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:25,986 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 343 transitions. [2022-02-24 02:47:25,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 02:47:25,986 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 343 transitions. [2022-02-24 02:47:25,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 02:47:25,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:25,987 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:25,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 02:47:25,988 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:25,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:25,988 INFO L85 PathProgramCache]: Analyzing trace with hash -198494423, now seen corresponding path program 2 times [2022-02-24 02:47:25,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:25,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132077470] [2022-02-24 02:47:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:25,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:25,991 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:25,991 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:26,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:26,459 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:26,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132077470] [2022-02-24 02:47:26,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2132077470] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:26,459 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:26,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:47:26,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816401801] [2022-02-24 02:47:26,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:26,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:47:26,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:26,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:47:26,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:47:26,460 INFO L87 Difference]: Start difference. First operand 270 states and 343 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 02:47:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:27,082 INFO L93 Difference]: Finished difference Result 535 states and 682 transitions. [2022-02-24 02:47:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:47:27,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 51 [2022-02-24 02:47:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:27,084 INFO L225 Difference]: With dead ends: 535 [2022-02-24 02:47:27,084 INFO L226 Difference]: Without dead ends: 367 [2022-02-24 02:47:27,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:47:27,085 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 226 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:27,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 42 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:27,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-02-24 02:47:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 295. [2022-02-24 02:47:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.2655172413793103) internal successors, (367), 290 states have internal predecessors, (367), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 371 transitions. [2022-02-24 02:47:27,237 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 371 transitions. Word has length 51 [2022-02-24 02:47:27,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:27,237 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 371 transitions. [2022-02-24 02:47:27,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 02:47:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 371 transitions. [2022-02-24 02:47:27,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 02:47:27,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:27,239 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 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 02:47:27,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 02:47:27,239 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:27,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:27,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1931900780, now seen corresponding path program 5 times [2022-02-24 02:47:27,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:27,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574054650] [2022-02-24 02:47:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:27,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:27,242 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:27,242 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:27,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:27,362 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 02:47:27,362 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:27,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574054650] [2022-02-24 02:47:27,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [574054650] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:27,362 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:27,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:47:27,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943371493] [2022-02-24 02:47:27,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:27,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:47:27,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:47:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:47:27,364 INFO L87 Difference]: Start difference. First operand 295 states and 371 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 02:47:28,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:28,725 INFO L93 Difference]: Finished difference Result 1351 states and 1687 transitions. [2022-02-24 02:47:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:47:28,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 52 [2022-02-24 02:47:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:28,731 INFO L225 Difference]: With dead ends: 1351 [2022-02-24 02:47:28,731 INFO L226 Difference]: Without dead ends: 1322 [2022-02-24 02:47:28,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:47:28,732 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 243 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:28,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 165 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:47:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-02-24 02:47:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 297. [2022-02-24 02:47:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.2671232876712328) internal successors, (370), 292 states have internal predecessors, (370), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 374 transitions. [2022-02-24 02:47:28,908 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 374 transitions. Word has length 52 [2022-02-24 02:47:28,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:28,908 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 374 transitions. [2022-02-24 02:47:28,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 02:47:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 374 transitions. [2022-02-24 02:47:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 02:47:28,910 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:28,910 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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, 1, 1, 1, 1, 1] [2022-02-24 02:47:28,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 02:47:28,910 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:28,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:28,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2072849753, now seen corresponding path program 2 times [2022-02-24 02:47:28,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:28,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847157392] [2022-02-24 02:47:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:28,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:28,913 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:28,913 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:28,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:28,962 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 02:47:28,963 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:28,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847157392] [2022-02-24 02:47:28,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1847157392] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:28,963 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:28,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:47:28,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863552584] [2022-02-24 02:47:28,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:28,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:47:28,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:28,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:47:28,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:47:28,964 INFO L87 Difference]: Start difference. First operand 297 states and 374 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:29,219 INFO L93 Difference]: Finished difference Result 514 states and 645 transitions. [2022-02-24 02:47:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 02:47:29,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 02:47:29,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:29,221 INFO L225 Difference]: With dead ends: 514 [2022-02-24 02:47:29,221 INFO L226 Difference]: Without dead ends: 273 [2022-02-24 02:47:29,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:47:29,222 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:29,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 53 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:29,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-02-24 02:47:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 253. [2022-02-24 02:47:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.189516129032258) internal successors, (295), 248 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 299 transitions. [2022-02-24 02:47:29,357 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 299 transitions. Word has length 54 [2022-02-24 02:47:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:29,358 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 299 transitions. [2022-02-24 02:47:29,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 299 transitions. [2022-02-24 02:47:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 02:47:29,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:29,358 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 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 02:47:29,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 02:47:29,359 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:29,359 INFO L85 PathProgramCache]: Analyzing trace with hash 258092167, now seen corresponding path program 6 times [2022-02-24 02:47:29,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:29,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729611378] [2022-02-24 02:47:29,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:29,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:29,362 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:29,362 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:29,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:29,498 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 02:47:29,499 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:29,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729611378] [2022-02-24 02:47:29,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [729611378] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:29,499 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:29,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:47:29,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371446170] [2022-02-24 02:47:29,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:29,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:47:29,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:29,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:47:29,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:47:29,500 INFO L87 Difference]: Start difference. First operand 253 states and 299 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:30,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:30,952 INFO L93 Difference]: Finished difference Result 1360 states and 1603 transitions. [2022-02-24 02:47:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:47:30,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 02:47:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:30,957 INFO L225 Difference]: With dead ends: 1360 [2022-02-24 02:47:30,957 INFO L226 Difference]: Without dead ends: 1331 [2022-02-24 02:47:30,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:47:30,958 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 296 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:30,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 186 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:47:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-02-24 02:47:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 255. [2022-02-24 02:47:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.192) internal successors, (298), 250 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 302 transitions. [2022-02-24 02:47:31,115 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 302 transitions. Word has length 54 [2022-02-24 02:47:31,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:31,116 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 302 transitions. [2022-02-24 02:47:31,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:31,116 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 302 transitions. [2022-02-24 02:47:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 02:47:31,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:31,117 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 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 02:47:31,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 02:47:31,117 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:31,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1954216222, now seen corresponding path program 7 times [2022-02-24 02:47:31,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:31,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893596345] [2022-02-24 02:47:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:31,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:31,120 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:31,120 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:31,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:31,270 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:31,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893596345] [2022-02-24 02:47:31,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1893596345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:31,271 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:31,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:47:31,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016539042] [2022-02-24 02:47:31,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:31,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:47:31,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:31,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:47:31,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:31,272 INFO L87 Difference]: Start difference. First operand 255 states and 302 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 02:47:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:33,464 INFO L93 Difference]: Finished difference Result 1528 states and 1803 transitions. [2022-02-24 02:47:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:47:33,465 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 56 [2022-02-24 02:47:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:33,469 INFO L225 Difference]: With dead ends: 1528 [2022-02-24 02:47:33,470 INFO L226 Difference]: Without dead ends: 1499 [2022-02-24 02:47:33,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:47:33,471 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 322 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:33,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 215 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:47:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2022-02-24 02:47:33,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 257. [2022-02-24 02:47:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.1944444444444444) internal successors, (301), 252 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 305 transitions. [2022-02-24 02:47:33,649 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 305 transitions. Word has length 56 [2022-02-24 02:47:33,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:33,649 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 305 transitions. [2022-02-24 02:47:33,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 02:47:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 305 transitions. [2022-02-24 02:47:33,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 02:47:33,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:33,651 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 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 02:47:33,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 02:47:33,651 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:33,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:33,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1973766531, now seen corresponding path program 8 times [2022-02-24 02:47:33,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:33,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223925267] [2022-02-24 02:47:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:33,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:33,654 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:33,654 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:33,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:33,840 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 02:47:33,840 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:33,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223925267] [2022-02-24 02:47:33,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1223925267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:33,841 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:33,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:47:33,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480517766] [2022-02-24 02:47:33,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:33,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:47:33,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:33,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:47:33,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:47:33,842 INFO L87 Difference]: Start difference. First operand 257 states and 305 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 02:47:36,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:36,047 INFO L93 Difference]: Finished difference Result 1696 states and 2003 transitions. [2022-02-24 02:47:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:47:36,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 58 [2022-02-24 02:47:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:36,052 INFO L225 Difference]: With dead ends: 1696 [2022-02-24 02:47:36,053 INFO L226 Difference]: Without dead ends: 1667 [2022-02-24 02:47:36,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:47:36,054 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 377 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2045 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:36,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 232 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2045 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:47:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2022-02-24 02:47:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 259. [2022-02-24 02:47:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.1968503937007875) internal successors, (304), 254 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 308 transitions. [2022-02-24 02:47:36,238 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 308 transitions. Word has length 58 [2022-02-24 02:47:36,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:36,238 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 308 transitions. [2022-02-24 02:47:36,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 02:47:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 308 transitions. [2022-02-24 02:47:36,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 02:47:36,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:36,239 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:36,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 02:47:36,240 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:36,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1813405083, now seen corresponding path program 3 times [2022-02-24 02:47:36,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:36,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500680938] [2022-02-24 02:47:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:36,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:36,243 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:36,243 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:36,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:36,353 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:36,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500680938] [2022-02-24 02:47:36,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [500680938] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:36,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:36,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:47:36,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727646060] [2022-02-24 02:47:36,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:36,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:47:36,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:36,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:47:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:47:36,355 INFO L87 Difference]: Start difference. First operand 259 states and 308 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 02:47:36,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:36,936 INFO L93 Difference]: Finished difference Result 376 states and 437 transitions. [2022-02-24 02:47:36,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:47:36,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 60 [2022-02-24 02:47:36,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:36,937 INFO L225 Difference]: With dead ends: 376 [2022-02-24 02:47:36,937 INFO L226 Difference]: Without dead ends: 300 [2022-02-24 02:47:36,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:47:36,943 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 132 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:36,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 52 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:36,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-24 02:47:37,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 236. [2022-02-24 02:47:37,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.1948051948051948) internal successors, (276), 231 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:37,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2022-02-24 02:47:37,097 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 60 [2022-02-24 02:47:37,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:37,097 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2022-02-24 02:47:37,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 02:47:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2022-02-24 02:47:37,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 02:47:37,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:37,098 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 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 02:47:37,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 02:47:37,098 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:37,098 INFO L85 PathProgramCache]: Analyzing trace with hash 713223000, now seen corresponding path program 9 times [2022-02-24 02:47:37,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:37,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323519239] [2022-02-24 02:47:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:37,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:37,101 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:37,101 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:37,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:37,273 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:37,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323519239] [2022-02-24 02:47:37,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [323519239] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:37,274 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:37,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:47:37,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950610324] [2022-02-24 02:47:37,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:37,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:47:37,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:37,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:47:37,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:47:37,275 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:39,874 INFO L93 Difference]: Finished difference Result 1828 states and 2162 transitions. [2022-02-24 02:47:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:47:39,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 02:47:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:39,879 INFO L225 Difference]: With dead ends: 1828 [2022-02-24 02:47:39,879 INFO L226 Difference]: Without dead ends: 1799 [2022-02-24 02:47:39,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:47:39,879 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 404 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2716 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:39,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 261 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2716 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:47:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-02-24 02:47:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 238. [2022-02-24 02:47:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.1974248927038627) internal successors, (279), 233 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 283 transitions. [2022-02-24 02:47:40,136 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 283 transitions. Word has length 60 [2022-02-24 02:47:40,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:40,136 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 283 transitions. [2022-02-24 02:47:40,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:40,136 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 283 transitions. [2022-02-24 02:47:40,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 02:47:40,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:40,137 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:40,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 02:47:40,137 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:40,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:40,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1971018387, now seen corresponding path program 4 times [2022-02-24 02:47:40,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:40,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927630606] [2022-02-24 02:47:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:40,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:40,142 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:40,142 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:40,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:40,436 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:40,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927630606] [2022-02-24 02:47:40,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927630606] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:40,436 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:40,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:47:40,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423093281] [2022-02-24 02:47:40,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:40,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:47:40,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:47:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:47:40,438 INFO L87 Difference]: Start difference. First operand 238 states and 283 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 02:47:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:40,901 INFO L93 Difference]: Finished difference Result 292 states and 341 transitions. [2022-02-24 02:47:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:47:40,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 61 [2022-02-24 02:47:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:40,902 INFO L225 Difference]: With dead ends: 292 [2022-02-24 02:47:40,902 INFO L226 Difference]: Without dead ends: 216 [2022-02-24 02:47:40,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:47:40,903 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:40,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 54 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:47:40,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-24 02:47:41,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-02-24 02:47:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.2037914691943128) internal successors, (254), 211 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 258 transitions. [2022-02-24 02:47:41,061 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 258 transitions. Word has length 61 [2022-02-24 02:47:41,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:41,061 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 258 transitions. [2022-02-24 02:47:41,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 02:47:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 258 transitions. [2022-02-24 02:47:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 02:47:41,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:41,062 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:41,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 02:47:41,062 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:41,062 INFO L85 PathProgramCache]: Analyzing trace with hash -891810688, now seen corresponding path program 5 times [2022-02-24 02:47:41,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:41,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126843388] [2022-02-24 02:47:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:41,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:41,065 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:41,065 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:41,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:41,771 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 02:47:41,772 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:41,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126843388] [2022-02-24 02:47:41,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1126843388] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:41,772 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:41,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:47:41,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644933727] [2022-02-24 02:47:41,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:41,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:47:41,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:41,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:47:41,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:47:41,773 INFO L87 Difference]: Start difference. First operand 216 states and 258 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 02:47:43,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:43,405 INFO L93 Difference]: Finished difference Result 788 states and 930 transitions. [2022-02-24 02:47:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 02:47:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 62 [2022-02-24 02:47:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:43,407 INFO L225 Difference]: With dead ends: 788 [2022-02-24 02:47:43,407 INFO L226 Difference]: Without dead ends: 676 [2022-02-24 02:47:43,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=354, Invalid=1626, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 02:47:43,408 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 264 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:43,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 87 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:47:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-02-24 02:47:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 291. [2022-02-24 02:47:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.1923076923076923) internal successors, (341), 286 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 345 transitions. [2022-02-24 02:47:43,634 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 345 transitions. Word has length 62 [2022-02-24 02:47:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:43,634 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 345 transitions. [2022-02-24 02:47:43,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 02:47:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 345 transitions. [2022-02-24 02:47:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 02:47:43,635 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:43,635 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:43,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 02:47:43,636 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:43,636 INFO L85 PathProgramCache]: Analyzing trace with hash -970116796, now seen corresponding path program 6 times [2022-02-24 02:47:43,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:43,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711651116] [2022-02-24 02:47:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:43,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:43,638 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:43,638 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:43,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:43,877 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:43,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711651116] [2022-02-24 02:47:43,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [711651116] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:43,877 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:43,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:47:43,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218199973] [2022-02-24 02:47:43,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:43,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:47:43,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:43,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:47:43,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:47:43,878 INFO L87 Difference]: Start difference. First operand 291 states and 345 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 02:47:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:44,526 INFO L93 Difference]: Finished difference Result 423 states and 495 transitions. [2022-02-24 02:47:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:47:44,526 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 62 [2022-02-24 02:47:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:44,527 INFO L225 Difference]: With dead ends: 423 [2022-02-24 02:47:44,528 INFO L226 Difference]: Without dead ends: 418 [2022-02-24 02:47:44,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:47:44,528 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 152 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:44,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 48 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-02-24 02:47:44,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 298. [2022-02-24 02:47:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.1945392491467577) internal successors, (350), 293 states have internal predecessors, (350), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 354 transitions. [2022-02-24 02:47:44,779 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 354 transitions. Word has length 62 [2022-02-24 02:47:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:44,779 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 354 transitions. [2022-02-24 02:47:44,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 02:47:44,779 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 354 transitions. [2022-02-24 02:47:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 02:47:44,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:44,780 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:47:44,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 02:47:44,780 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:44,781 INFO L85 PathProgramCache]: Analyzing trace with hash 475673560, now seen corresponding path program 7 times [2022-02-24 02:47:44,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:44,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367240674] [2022-02-24 02:47:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:44,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:44,784 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:44,784 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:44,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:44,877 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 02:47:44,877 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:44,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367240674] [2022-02-24 02:47:44,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [367240674] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:44,877 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:44,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:47:44,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178456630] [2022-02-24 02:47:44,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:44,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:47:44,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:44,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:47:44,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:47:44,879 INFO L87 Difference]: Start difference. First operand 298 states and 354 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 02:47:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:45,724 INFO L93 Difference]: Finished difference Result 593 states and 691 transitions. [2022-02-24 02:47:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:47:45,724 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 63 [2022-02-24 02:47:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:45,726 INFO L225 Difference]: With dead ends: 593 [2022-02-24 02:47:45,726 INFO L226 Difference]: Without dead ends: 544 [2022-02-24 02:47:45,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:47:45,727 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 99 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:45,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 67 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-02-24 02:47:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 298. [2022-02-24 02:47:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.1843003412969284) internal successors, (347), 293 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 351 transitions. [2022-02-24 02:47:45,965 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 351 transitions. Word has length 63 [2022-02-24 02:47:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:45,966 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 351 transitions. [2022-02-24 02:47:45,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 02:47:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 351 transitions. [2022-02-24 02:47:45,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 02:47:45,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:45,966 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:47:45,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 02:47:45,967 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:45,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:45,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2031628323, now seen corresponding path program 8 times [2022-02-24 02:47:45,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:45,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227051281] [2022-02-24 02:47:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:45,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:45,969 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:45,970 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:46,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:46,090 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:46,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227051281] [2022-02-24 02:47:46,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [227051281] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:46,090 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:46,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:47:46,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578586985] [2022-02-24 02:47:46,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:46,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:47:46,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:46,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:47:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:47:46,092 INFO L87 Difference]: Start difference. First operand 298 states and 351 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 02:47:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:47,040 INFO L93 Difference]: Finished difference Result 793 states and 925 transitions. [2022-02-24 02:47:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:47:47,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 65 [2022-02-24 02:47:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:47,043 INFO L225 Difference]: With dead ends: 793 [2022-02-24 02:47:47,043 INFO L226 Difference]: Without dead ends: 744 [2022-02-24 02:47:47,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:47:47,044 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 188 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:47,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 81 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:47:47,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-02-24 02:47:47,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 320. [2022-02-24 02:47:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1777777777777778) internal successors, (371), 315 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:47,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 375 transitions. [2022-02-24 02:47:47,316 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 375 transitions. Word has length 65 [2022-02-24 02:47:47,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:47,316 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 375 transitions. [2022-02-24 02:47:47,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 02:47:47,316 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 375 transitions. [2022-02-24 02:47:47,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 02:47:47,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:47,317 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:47:47,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 02:47:47,317 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:47,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:47,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2072084830, now seen corresponding path program 9 times [2022-02-24 02:47:47,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:47,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402425784] [2022-02-24 02:47:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:47,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:47,319 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:47,319 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:47,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:47,450 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:47,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402425784] [2022-02-24 02:47:47,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [402425784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:47,450 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:47,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:47:47,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514629370] [2022-02-24 02:47:47,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:47,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:47:47,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:47,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:47:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:47:47,451 INFO L87 Difference]: Start difference. First operand 320 states and 375 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 02:47:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:48,718 INFO L93 Difference]: Finished difference Result 984 states and 1147 transitions. [2022-02-24 02:47:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:47:48,718 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 67 [2022-02-24 02:47:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:48,721 INFO L225 Difference]: With dead ends: 984 [2022-02-24 02:47:48,721 INFO L226 Difference]: Without dead ends: 935 [2022-02-24 02:47:48,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:47:48,721 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 198 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:48,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 110 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-02-24 02:47:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 320. [2022-02-24 02:47:48,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1777777777777778) internal successors, (371), 315 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 375 transitions. [2022-02-24 02:47:48,991 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 375 transitions. Word has length 67 [2022-02-24 02:47:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:48,991 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 375 transitions. [2022-02-24 02:47:48,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 02:47:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 375 transitions. [2022-02-24 02:47:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 02:47:48,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:48,993 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:47:48,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 02:47:48,993 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:48,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:48,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1998884903, now seen corresponding path program 10 times [2022-02-24 02:47:48,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:48,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844673418] [2022-02-24 02:47:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:48,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:48,996 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:48,996 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:49,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:49,158 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 02:47:49,158 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:49,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844673418] [2022-02-24 02:47:49,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [844673418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:49,159 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:49,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:47:49,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357151912] [2022-02-24 02:47:49,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:49,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:47:49,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:49,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:47:49,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:47:49,160 INFO L87 Difference]: Start difference. First operand 320 states and 375 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:50,730 INFO L93 Difference]: Finished difference Result 1175 states and 1369 transitions. [2022-02-24 02:47:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:47:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 02:47:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:50,733 INFO L225 Difference]: With dead ends: 1175 [2022-02-24 02:47:50,733 INFO L226 Difference]: Without dead ends: 1126 [2022-02-24 02:47:50,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:47:50,734 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 228 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:50,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 134 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2022-02-24 02:47:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 320. [2022-02-24 02:47:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1777777777777778) internal successors, (371), 315 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 375 transitions. [2022-02-24 02:47:51,045 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 375 transitions. Word has length 69 [2022-02-24 02:47:51,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:51,047 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 375 transitions. [2022-02-24 02:47:51,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 375 transitions. [2022-02-24 02:47:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 02:47:51,048 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:51,048 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:47:51,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 02:47:51,048 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:51,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:51,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1485591660, now seen corresponding path program 11 times [2022-02-24 02:47:51,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:51,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479075038] [2022-02-24 02:47:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:51,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:51,051 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:51,051 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:51,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:51,203 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 02:47:51,203 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:51,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479075038] [2022-02-24 02:47:51,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479075038] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:51,203 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:51,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:47:51,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109099115] [2022-02-24 02:47:51,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:51,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:47:51,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:51,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:47:51,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:47:51,205 INFO L87 Difference]: Start difference. First operand 320 states and 375 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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 02:47:53,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:53,122 INFO L93 Difference]: Finished difference Result 1366 states and 1591 transitions. [2022-02-24 02:47:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:47:53,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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 71 [2022-02-24 02:47:53,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:53,125 INFO L225 Difference]: With dead ends: 1366 [2022-02-24 02:47:53,125 INFO L226 Difference]: Without dead ends: 1317 [2022-02-24 02:47:53,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:47:53,126 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 276 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:53,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 141 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:53,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-02-24 02:47:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 320. [2022-02-24 02:47:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.1777777777777778) internal successors, (371), 315 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 375 transitions. [2022-02-24 02:47:53,419 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 375 transitions. Word has length 71 [2022-02-24 02:47:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:53,419 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 375 transitions. [2022-02-24 02:47:53,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 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 02:47:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 375 transitions. [2022-02-24 02:47:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:47:53,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:53,420 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-02-24 02:47:53,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 02:47:53,420 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:53,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:53,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1517007984, now seen corresponding path program 12 times [2022-02-24 02:47:53,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:53,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605482258] [2022-02-24 02:47:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:53,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:53,423 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:53,423 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:53,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:53,590 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:53,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605482258] [2022-02-24 02:47:53,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [605482258] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:53,591 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:53,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:47:53,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113550257] [2022-02-24 02:47:53,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:53,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:47:53,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:53,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:47:53,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:47:53,592 INFO L87 Difference]: Start difference. First operand 320 states and 375 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 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 02:47:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:54,650 INFO L93 Difference]: Finished difference Result 526 states and 612 transitions. [2022-02-24 02:47:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:47:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 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 72 [2022-02-24 02:47:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:54,652 INFO L225 Difference]: With dead ends: 526 [2022-02-24 02:47:54,652 INFO L226 Difference]: Without dead ends: 521 [2022-02-24 02:47:54,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:47:54,653 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 182 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:54,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 137 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:47:54,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-24 02:47:55,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 418. [2022-02-24 02:47:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 1.171912832929782) internal successors, (484), 413 states have internal predecessors, (484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 488 transitions. [2022-02-24 02:47:55,054 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 488 transitions. Word has length 72 [2022-02-24 02:47:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:55,054 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 488 transitions. [2022-02-24 02:47:55,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 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 02:47:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 488 transitions. [2022-02-24 02:47:55,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:47:55,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:55,055 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-24 02:47:55,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 02:47:55,056 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:55,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:55,056 INFO L85 PathProgramCache]: Analyzing trace with hash 930201970, now seen corresponding path program 13 times [2022-02-24 02:47:55,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:55,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107123451] [2022-02-24 02:47:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:55,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:55,059 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:55,059 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:55,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:55,845 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 02:47:55,846 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:55,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107123451] [2022-02-24 02:47:55,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1107123451] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:55,846 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:55,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:47:55,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956276833] [2022-02-24 02:47:55,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:55,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:47:55,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:55,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:47:55,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:47:55,847 INFO L87 Difference]: Start difference. First operand 418 states and 488 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 02:47:57,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:47:57,828 INFO L93 Difference]: Finished difference Result 955 states and 1106 transitions. [2022-02-24 02:47:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:47:57,829 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 72 [2022-02-24 02:47:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:47:57,831 INFO L225 Difference]: With dead ends: 955 [2022-02-24 02:47:57,831 INFO L226 Difference]: Without dead ends: 901 [2022-02-24 02:47:57,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=872, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:47:57,832 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 252 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:47:57,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 61 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:47:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-02-24 02:47:58,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 485. [2022-02-24 02:47:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 480 states have (on average 1.1479166666666667) internal successors, (551), 480 states have internal predecessors, (551), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:47:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 555 transitions. [2022-02-24 02:47:58,369 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 555 transitions. Word has length 72 [2022-02-24 02:47:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:47:58,369 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 555 transitions. [2022-02-24 02:47:58,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 02:47:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 555 transitions. [2022-02-24 02:47:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:47:58,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:47:58,371 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-24 02:47:58,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 02:47:58,371 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:47:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:47:58,371 INFO L85 PathProgramCache]: Analyzing trace with hash -188563146, now seen corresponding path program 14 times [2022-02-24 02:47:58,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:47:58,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356660490] [2022-02-24 02:47:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:47:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:47:58,376 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:47:58,376 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:47:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:59,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:47:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:47:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:47:59,196 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:47:59,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356660490] [2022-02-24 02:47:59,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [356660490] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:47:59,196 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:47:59,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:47:59,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343249605] [2022-02-24 02:47:59,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:47:59,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:47:59,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:47:59,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:47:59,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:47:59,199 INFO L87 Difference]: Start difference. First operand 485 states and 555 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 02:48:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:01,256 INFO L93 Difference]: Finished difference Result 1241 states and 1437 transitions. [2022-02-24 02:48:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:48:01,257 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 72 [2022-02-24 02:48:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:01,260 INFO L225 Difference]: With dead ends: 1241 [2022-02-24 02:48:01,260 INFO L226 Difference]: Without dead ends: 1026 [2022-02-24 02:48:01,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:48:01,261 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 212 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:01,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 60 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:48:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-02-24 02:48:01,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 615. [2022-02-24 02:48:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 610 states have (on average 1.1327868852459015) internal successors, (691), 610 states have internal predecessors, (691), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 695 transitions. [2022-02-24 02:48:01,922 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 695 transitions. Word has length 72 [2022-02-24 02:48:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:01,922 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 695 transitions. [2022-02-24 02:48:01,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 02:48:01,922 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 695 transitions. [2022-02-24 02:48:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:48:01,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:01,924 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-24 02:48:01,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 02:48:01,924 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:01,925 INFO L85 PathProgramCache]: Analyzing trace with hash 673002482, now seen corresponding path program 15 times [2022-02-24 02:48:01,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:01,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636043723] [2022-02-24 02:48:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:01,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:01,927 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:01,928 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:02,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:02,859 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:02,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636043723] [2022-02-24 02:48:02,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [636043723] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:02,860 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:02,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:48:02,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951130989] [2022-02-24 02:48:02,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:02,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:48:02,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:02,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:48:02,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:48:02,861 INFO L87 Difference]: Start difference. First operand 615 states and 695 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 02:48:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:04,758 INFO L93 Difference]: Finished difference Result 1197 states and 1376 transitions. [2022-02-24 02:48:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:48:04,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 72 [2022-02-24 02:48:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:04,761 INFO L225 Difference]: With dead ends: 1197 [2022-02-24 02:48:04,761 INFO L226 Difference]: Without dead ends: 994 [2022-02-24 02:48:04,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=872, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:48:04,762 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 247 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:04,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 50 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:48:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-02-24 02:48:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 804. [2022-02-24 02:48:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 799 states have (on average 1.1264080100125156) internal successors, (900), 799 states have internal predecessors, (900), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 904 transitions. [2022-02-24 02:48:05,664 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 904 transitions. Word has length 72 [2022-02-24 02:48:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:05,664 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 904 transitions. [2022-02-24 02:48:05,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 02:48:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 904 transitions. [2022-02-24 02:48:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:48:05,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:05,667 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-24 02:48:05,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 02:48:05,667 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:05,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:05,667 INFO L85 PathProgramCache]: Analyzing trace with hash 479223478, now seen corresponding path program 16 times [2022-02-24 02:48:05,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:05,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125943637] [2022-02-24 02:48:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:05,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:05,670 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:05,670 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:06,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:06,456 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 02:48:06,457 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:06,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125943637] [2022-02-24 02:48:06,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2125943637] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:06,457 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:06,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:48:06,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859097167] [2022-02-24 02:48:06,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:06,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:48:06,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:06,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:48:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:48:06,458 INFO L87 Difference]: Start difference. First operand 804 states and 904 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 02:48:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:08,300 INFO L93 Difference]: Finished difference Result 1010 states and 1145 transitions. [2022-02-24 02:48:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:48:08,301 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 72 [2022-02-24 02:48:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:08,303 INFO L225 Difference]: With dead ends: 1010 [2022-02-24 02:48:08,303 INFO L226 Difference]: Without dead ends: 822 [2022-02-24 02:48:08,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:48:08,304 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 219 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:08,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 85 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:48:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-02-24 02:48:09,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 666. [2022-02-24 02:48:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 661 states have (on average 1.1270801815431164) internal successors, (745), 661 states have internal predecessors, (745), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:09,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 749 transitions. [2022-02-24 02:48:09,066 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 749 transitions. Word has length 72 [2022-02-24 02:48:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:09,066 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 749 transitions. [2022-02-24 02:48:09,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 02:48:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 749 transitions. [2022-02-24 02:48:09,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 02:48:09,068 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:09,068 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 5, 5, 4, 4, 3, 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 02:48:09,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 02:48:09,069 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:09,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:09,069 INFO L85 PathProgramCache]: Analyzing trace with hash -316626525, now seen corresponding path program 10 times [2022-02-24 02:48:09,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:09,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675605804] [2022-02-24 02:48:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:09,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:09,072 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:09,072 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:09,264 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:09,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675605804] [2022-02-24 02:48:09,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [675605804] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:09,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:09,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:48:09,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175239657] [2022-02-24 02:48:09,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:09,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:48:09,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:09,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:48:09,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:48:09,265 INFO L87 Difference]: Start difference. First operand 666 states and 749 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:14,463 INFO L93 Difference]: Finished difference Result 3092 states and 3576 transitions. [2022-02-24 02:48:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:48:14,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 02:48:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:14,470 INFO L225 Difference]: With dead ends: 3092 [2022-02-24 02:48:14,470 INFO L226 Difference]: Without dead ends: 3048 [2022-02-24 02:48:14,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:48:14,471 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 389 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2762 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:14,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 261 Invalid, 2782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2762 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:48:14,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2022-02-24 02:48:15,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 668. [2022-02-24 02:48:15,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 663 states have (on average 1.1282051282051282) internal successors, (748), 663 states have internal predecessors, (748), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 752 transitions. [2022-02-24 02:48:15,250 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 752 transitions. Word has length 72 [2022-02-24 02:48:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:15,250 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 752 transitions. [2022-02-24 02:48:15,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 752 transitions. [2022-02-24 02:48:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 02:48:15,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:15,252 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:48:15,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 02:48:15,252 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2132024177, now seen corresponding path program 17 times [2022-02-24 02:48:15,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:15,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983109837] [2022-02-24 02:48:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:15,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:15,255 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:15,256 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:15,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:15,445 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:15,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983109837] [2022-02-24 02:48:15,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [983109837] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:15,445 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:15,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:48:15,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196250377] [2022-02-24 02:48:15,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:15,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:48:15,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:15,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:48:15,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:48:15,447 INFO L87 Difference]: Start difference. First operand 668 states and 752 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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 02:48:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:18,999 INFO L93 Difference]: Finished difference Result 2177 states and 2503 transitions. [2022-02-24 02:48:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:48:19,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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 73 [2022-02-24 02:48:19,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:19,007 INFO L225 Difference]: With dead ends: 2177 [2022-02-24 02:48:19,007 INFO L226 Difference]: Without dead ends: 2128 [2022-02-24 02:48:19,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:48:19,008 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 316 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:19,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 165 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:48:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2022-02-24 02:48:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 668. [2022-02-24 02:48:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 663 states have (on average 1.1282051282051282) internal successors, (748), 663 states have internal predecessors, (748), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 752 transitions. [2022-02-24 02:48:19,806 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 752 transitions. Word has length 73 [2022-02-24 02:48:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:19,806 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 752 transitions. [2022-02-24 02:48:19,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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 02:48:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 752 transitions. [2022-02-24 02:48:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 02:48:19,807 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:19,807 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1] [2022-02-24 02:48:19,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 02:48:19,808 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash -505226483, now seen corresponding path program 18 times [2022-02-24 02:48:19,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:19,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497483570] [2022-02-24 02:48:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:19,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:19,811 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:19,811 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:19,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:19,932 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 02:48:19,932 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:19,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497483570] [2022-02-24 02:48:19,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [497483570] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:19,933 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:19,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 02:48:19,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838780575] [2022-02-24 02:48:19,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:19,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 02:48:19,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:19,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 02:48:19,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:48:19,934 INFO L87 Difference]: Start difference. First operand 668 states and 752 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:22,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:22,031 INFO L93 Difference]: Finished difference Result 1320 states and 1505 transitions. [2022-02-24 02:48:22,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:48:22,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 02:48:22,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:22,035 INFO L225 Difference]: With dead ends: 1320 [2022-02-24 02:48:22,035 INFO L226 Difference]: Without dead ends: 1235 [2022-02-24 02:48:22,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:48:22,036 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 258 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:22,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 81 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:48:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-02-24 02:48:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 726. [2022-02-24 02:48:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 721 states have (on average 1.1289875173370318) internal successors, (814), 721 states have internal predecessors, (814), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 818 transitions. [2022-02-24 02:48:22,892 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 818 transitions. Word has length 74 [2022-02-24 02:48:22,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:22,893 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 818 transitions. [2022-02-24 02:48:22,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:22,893 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 818 transitions. [2022-02-24 02:48:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 02:48:22,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:22,894 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 5, 5, 4, 4, 3, 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 02:48:22,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 02:48:22,894 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:22,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:22,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1752054978, now seen corresponding path program 11 times [2022-02-24 02:48:22,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:22,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205585394] [2022-02-24 02:48:22,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:22,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:22,897 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:22,898 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:23,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:23,100 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:23,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205585394] [2022-02-24 02:48:23,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [205585394] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:23,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:23,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:48:23,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50882341] [2022-02-24 02:48:23,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:23,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:48:23,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:23,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:48:23,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:48:23,102 INFO L87 Difference]: Start difference. First operand 726 states and 818 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 02:48:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:29,207 INFO L93 Difference]: Finished difference Result 3408 states and 3942 transitions. [2022-02-24 02:48:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:48:29,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 74 [2022-02-24 02:48:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:29,221 INFO L225 Difference]: With dead ends: 3408 [2022-02-24 02:48:29,221 INFO L226 Difference]: Without dead ends: 3364 [2022-02-24 02:48:29,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:48:29,223 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 405 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3530 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 3551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:29,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 290 Invalid, 3551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3530 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 02:48:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2022-02-24 02:48:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 728. [2022-02-24 02:48:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 723 states have (on average 1.1300138312586445) internal successors, (817), 723 states have internal predecessors, (817), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 821 transitions. [2022-02-24 02:48:30,107 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 821 transitions. Word has length 74 [2022-02-24 02:48:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:30,108 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 821 transitions. [2022-02-24 02:48:30,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 02:48:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 821 transitions. [2022-02-24 02:48:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 02:48:30,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:30,109 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:48:30,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 02:48:30,109 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:30,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:30,110 INFO L85 PathProgramCache]: Analyzing trace with hash 583415094, now seen corresponding path program 19 times [2022-02-24 02:48:30,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:30,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326851778] [2022-02-24 02:48:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:30,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:30,112 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:30,112 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:30,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:30,282 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 02:48:30,283 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:30,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326851778] [2022-02-24 02:48:30,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326851778] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:30,283 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:30,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:48:30,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371467365] [2022-02-24 02:48:30,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:30,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:48:30,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:30,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:48:30,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:48:30,284 INFO L87 Difference]: Start difference. First operand 728 states and 821 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 02:48:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:34,626 INFO L93 Difference]: Finished difference Result 2493 states and 2869 transitions. [2022-02-24 02:48:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:48:34,627 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 75 [2022-02-24 02:48:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:34,631 INFO L225 Difference]: With dead ends: 2493 [2022-02-24 02:48:34,631 INFO L226 Difference]: Without dead ends: 2444 [2022-02-24 02:48:34,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:48:34,632 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 346 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:34,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 189 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:48:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-02-24 02:48:35,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 728. [2022-02-24 02:48:35,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 723 states have (on average 1.1300138312586445) internal successors, (817), 723 states have internal predecessors, (817), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 821 transitions. [2022-02-24 02:48:35,541 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 821 transitions. Word has length 75 [2022-02-24 02:48:35,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:35,542 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 821 transitions. [2022-02-24 02:48:35,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 02:48:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 821 transitions. [2022-02-24 02:48:35,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 02:48:35,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:35,543 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 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, 1] [2022-02-24 02:48:35,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 02:48:35,544 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:35,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1267467800, now seen corresponding path program 20 times [2022-02-24 02:48:35,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:35,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273116556] [2022-02-24 02:48:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:35,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:35,547 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:35,547 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:35,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:35,697 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 02:48:35,697 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:35,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273116556] [2022-02-24 02:48:35,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [273116556] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:35,697 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:35,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:48:35,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116560892] [2022-02-24 02:48:35,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:35,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:48:35,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:35,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:48:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:48:35,699 INFO L87 Difference]: Start difference. First operand 728 states and 821 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:38,360 INFO L93 Difference]: Finished difference Result 1618 states and 1853 transitions. [2022-02-24 02:48:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:48:38,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 02:48:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:38,363 INFO L225 Difference]: With dead ends: 1618 [2022-02-24 02:48:38,363 INFO L226 Difference]: Without dead ends: 1533 [2022-02-24 02:48:38,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:48:38,364 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 280 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:38,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 99 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:48:38,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-02-24 02:48:39,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 728. [2022-02-24 02:48:39,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 723 states have (on average 1.1300138312586445) internal successors, (817), 723 states have internal predecessors, (817), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 821 transitions. [2022-02-24 02:48:39,279 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 821 transitions. Word has length 76 [2022-02-24 02:48:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:39,279 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 821 transitions. [2022-02-24 02:48:39,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 821 transitions. [2022-02-24 02:48:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 02:48:39,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:39,280 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 5, 5, 4, 4, 3, 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 02:48:39,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 02:48:39,280 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1780671001, now seen corresponding path program 12 times [2022-02-24 02:48:39,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:39,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664097918] [2022-02-24 02:48:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:39,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:39,283 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:39,283 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:39,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:39,517 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 02:48:39,518 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:39,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664097918] [2022-02-24 02:48:39,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [664097918] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:39,518 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:39,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:48:39,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051545012] [2022-02-24 02:48:39,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:39,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:48:39,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:48:39,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:48:39,519 INFO L87 Difference]: Start difference. First operand 728 states and 821 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 02:48:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:46,893 INFO L93 Difference]: Finished difference Result 3724 states and 4308 transitions. [2022-02-24 02:48:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:48:46,894 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 76 [2022-02-24 02:48:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:46,899 INFO L225 Difference]: With dead ends: 3724 [2022-02-24 02:48:46,899 INFO L226 Difference]: Without dead ends: 3680 [2022-02-24 02:48:46,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 02:48:46,901 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 435 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4123 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 4145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:46,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 314 Invalid, 4145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4123 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 02:48:46,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2022-02-24 02:48:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 730. [2022-02-24 02:48:47,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 725 states have (on average 1.1310344827586207) internal successors, (820), 725 states have internal predecessors, (820), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 824 transitions. [2022-02-24 02:48:47,842 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 824 transitions. Word has length 76 [2022-02-24 02:48:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:47,842 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 824 transitions. [2022-02-24 02:48:47,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 02:48:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 824 transitions. [2022-02-24 02:48:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 02:48:47,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:47,843 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:48:47,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 02:48:47,844 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:47,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1571229253, now seen corresponding path program 21 times [2022-02-24 02:48:47,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:47,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042822310] [2022-02-24 02:48:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:47,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:47,847 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:47,847 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:48,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:48,049 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:48,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042822310] [2022-02-24 02:48:48,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042822310] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:48,049 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:48,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:48:48,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957981641] [2022-02-24 02:48:48,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:48,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:48:48,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:48:48,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:48:48,050 INFO L87 Difference]: Start difference. First operand 730 states and 824 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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 02:48:53,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:53,368 INFO L93 Difference]: Finished difference Result 2809 states and 3235 transitions. [2022-02-24 02:48:53,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:48:53,368 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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 77 [2022-02-24 02:48:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:53,372 INFO L225 Difference]: With dead ends: 2809 [2022-02-24 02:48:53,373 INFO L226 Difference]: Without dead ends: 2760 [2022-02-24 02:48:53,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:48:53,373 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 376 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:53,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 213 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:48:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2022-02-24 02:48:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 730. [2022-02-24 02:48:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 725 states have (on average 1.1310344827586207) internal successors, (820), 725 states have internal predecessors, (820), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 824 transitions. [2022-02-24 02:48:54,319 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 824 transitions. Word has length 77 [2022-02-24 02:48:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:54,319 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 824 transitions. [2022-02-24 02:48:54,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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 02:48:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 824 transitions. [2022-02-24 02:48:54,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 02:48:54,320 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:54,321 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 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, 1] [2022-02-24 02:48:54,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 02:48:54,321 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash 658034179, now seen corresponding path program 22 times [2022-02-24 02:48:54,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:54,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668144764] [2022-02-24 02:48:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:54,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:54,324 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:54,324 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:54,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:48:54,480 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:54,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668144764] [2022-02-24 02:48:54,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [668144764] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:54,480 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:54,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:48:54,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342597771] [2022-02-24 02:48:54,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:54,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:48:54,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:48:54,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:48:54,481 INFO L87 Difference]: Start difference. First operand 730 states and 824 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 02:48:57,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:48:57,998 INFO L93 Difference]: Finished difference Result 1940 states and 2225 transitions. [2022-02-24 02:48:57,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 02:48:57,998 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 78 [2022-02-24 02:48:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:48:58,001 INFO L225 Difference]: With dead ends: 1940 [2022-02-24 02:48:58,001 INFO L226 Difference]: Without dead ends: 1855 [2022-02-24 02:48:58,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:48:58,002 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 284 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:48:58,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 133 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:48:58,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2022-02-24 02:48:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 730. [2022-02-24 02:48:58,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 725 states have (on average 1.1310344827586207) internal successors, (820), 725 states have internal predecessors, (820), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:48:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 824 transitions. [2022-02-24 02:48:58,957 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 824 transitions. Word has length 78 [2022-02-24 02:48:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:48:58,957 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 824 transitions. [2022-02-24 02:48:58,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 02:48:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 824 transitions. [2022-02-24 02:48:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 02:48:58,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:48:58,959 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 5, 5, 4, 4, 3, 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 02:48:58,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 02:48:58,959 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:48:58,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:48:58,959 INFO L85 PathProgramCache]: Analyzing trace with hash -588794316, now seen corresponding path program 13 times [2022-02-24 02:48:58,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:48:58,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861602679] [2022-02-24 02:48:58,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:48:58,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:48:58,962 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:48:58,962 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:48:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:59,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:48:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:48:59,207 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 02:48:59,208 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:48:59,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861602679] [2022-02-24 02:48:59,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861602679] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:48:59,208 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:48:59,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:48:59,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127259498] [2022-02-24 02:48:59,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:48:59,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:48:59,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:48:59,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:48:59,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:48:59,209 INFO L87 Difference]: Start difference. First operand 730 states and 824 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 02:49:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:07,681 INFO L93 Difference]: Finished difference Result 4040 states and 4674 transitions. [2022-02-24 02:49:07,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 02:49:07,681 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 78 [2022-02-24 02:49:07,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:07,689 INFO L225 Difference]: With dead ends: 4040 [2022-02-24 02:49:07,689 INFO L226 Difference]: Without dead ends: 3996 [2022-02-24 02:49:07,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 02:49:07,691 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 479 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 4495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:07,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 333 Invalid, 4495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 02:49:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2022-02-24 02:49:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 732. [2022-02-24 02:49:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 727 states have (on average 1.1320495185694635) internal successors, (823), 727 states have internal predecessors, (823), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:08,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 827 transitions. [2022-02-24 02:49:08,797 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 827 transitions. Word has length 78 [2022-02-24 02:49:08,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:08,797 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 827 transitions. [2022-02-24 02:49:08,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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 02:49:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 827 transitions. [2022-02-24 02:49:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 02:49:08,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:08,798 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:49:08,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 02:49:08,798 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:08,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2010210048, now seen corresponding path program 23 times [2022-02-24 02:49:08,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:08,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113833706] [2022-02-24 02:49:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:08,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:08,801 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:08,801 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:09,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:09,024 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 02:49:09,025 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:09,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113833706] [2022-02-24 02:49:09,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1113833706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:09,025 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:09,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:49:09,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185121822] [2022-02-24 02:49:09,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:09,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:49:09,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:09,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:49:09,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:49:09,026 INFO L87 Difference]: Start difference. First operand 732 states and 827 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 02:49:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:15,617 INFO L93 Difference]: Finished difference Result 3125 states and 3601 transitions. [2022-02-24 02:49:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:49:15,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 79 [2022-02-24 02:49:15,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:15,624 INFO L225 Difference]: With dead ends: 3125 [2022-02-24 02:49:15,624 INFO L226 Difference]: Without dead ends: 3076 [2022-02-24 02:49:15,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-02-24 02:49:15,625 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 406 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2516 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:15,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 237 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2516 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 02:49:15,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2022-02-24 02:49:16,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 732. [2022-02-24 02:49:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 727 states have (on average 1.1320495185694635) internal successors, (823), 727 states have internal predecessors, (823), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 827 transitions. [2022-02-24 02:49:16,743 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 827 transitions. Word has length 79 [2022-02-24 02:49:16,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:16,743 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 827 transitions. [2022-02-24 02:49:16,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 02:49:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 827 transitions. [2022-02-24 02:49:16,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 02:49:16,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:16,744 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 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, 1] [2022-02-24 02:49:16,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 02:49:16,744 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash -65468578, now seen corresponding path program 24 times [2022-02-24 02:49:16,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:16,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417504560] [2022-02-24 02:49:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:16,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:16,747 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:16,748 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:16,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:16,918 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:16,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417504560] [2022-02-24 02:49:16,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [417504560] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:16,918 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:16,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:49:16,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481014731] [2022-02-24 02:49:16,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:16,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:49:16,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:16,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:49:16,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:49:16,920 INFO L87 Difference]: Start difference. First operand 732 states and 827 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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 02:49:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:21,498 INFO L93 Difference]: Finished difference Result 2299 states and 2642 transitions. [2022-02-24 02:49:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 02:49:21,498 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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 80 [2022-02-24 02:49:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:21,501 INFO L225 Difference]: With dead ends: 2299 [2022-02-24 02:49:21,501 INFO L226 Difference]: Without dead ends: 2214 [2022-02-24 02:49:21,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:49:21,502 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 386 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:21,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 143 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:49:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2022-02-24 02:49:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 732. [2022-02-24 02:49:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 727 states have (on average 1.1320495185694635) internal successors, (823), 727 states have internal predecessors, (823), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 827 transitions. [2022-02-24 02:49:22,558 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 827 transitions. Word has length 80 [2022-02-24 02:49:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:22,558 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 827 transitions. [2022-02-24 02:49:22,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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 02:49:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 827 transitions. [2022-02-24 02:49:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 02:49:22,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:22,559 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 5, 5, 4, 4, 3, 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 02:49:22,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 02:49:22,559 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:22,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1312297073, now seen corresponding path program 14 times [2022-02-24 02:49:22,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:22,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556294362] [2022-02-24 02:49:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:22,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:22,561 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:22,561 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:22,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:22,822 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:22,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556294362] [2022-02-24 02:49:22,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [556294362] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:22,823 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:22,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:49:22,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445314349] [2022-02-24 02:49:22,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:22,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:49:22,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:22,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:49:22,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:49:22,824 INFO L87 Difference]: Start difference. First operand 732 states and 827 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 02:49:32,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:32,795 INFO L93 Difference]: Finished difference Result 4356 states and 5040 transitions. [2022-02-24 02:49:32,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:49:32,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 80 [2022-02-24 02:49:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:32,802 INFO L225 Difference]: With dead ends: 4356 [2022-02-24 02:49:32,802 INFO L226 Difference]: Without dead ends: 4312 [2022-02-24 02:49:32,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 02:49:32,804 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 510 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 5134 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 5159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 5134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:32,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 357 Invalid, 5159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 5134 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 02:49:32,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2022-02-24 02:49:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 734. [2022-02-24 02:49:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 729 states have (on average 1.1330589849108368) internal successors, (826), 729 states have internal predecessors, (826), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 830 transitions. [2022-02-24 02:49:33,959 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 830 transitions. Word has length 80 [2022-02-24 02:49:33,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:33,959 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 830 transitions. [2022-02-24 02:49:33,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 02:49:33,959 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 830 transitions. [2022-02-24 02:49:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 02:49:33,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:33,960 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1] [2022-02-24 02:49:33,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 02:49:33,961 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:33,961 INFO L85 PathProgramCache]: Analyzing trace with hash 598040280, now seen corresponding path program 25 times [2022-02-24 02:49:33,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:33,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466198079] [2022-02-24 02:49:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:33,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:33,964 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:33,964 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:34,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:34,098 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 02:49:34,098 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:34,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466198079] [2022-02-24 02:49:34,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1466198079] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:34,099 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:34,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:49:34,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792876066] [2022-02-24 02:49:34,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:34,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:49:34,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:34,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:49:34,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:49:34,100 INFO L87 Difference]: Start difference. First operand 734 states and 830 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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 02:49:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:35,404 INFO L93 Difference]: Finished difference Result 879 states and 992 transitions. [2022-02-24 02:49:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:49:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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 81 [2022-02-24 02:49:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:35,405 INFO L225 Difference]: With dead ends: 879 [2022-02-24 02:49:35,405 INFO L226 Difference]: Without dead ends: 616 [2022-02-24 02:49:35,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:49:35,406 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:35,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 81 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:49:35,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-02-24 02:49:36,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 555. [2022-02-24 02:49:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 550 states have (on average 1.1454545454545455) internal successors, (630), 550 states have internal predecessors, (630), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:36,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 634 transitions. [2022-02-24 02:49:36,280 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 634 transitions. Word has length 81 [2022-02-24 02:49:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:36,281 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 634 transitions. [2022-02-24 02:49:36,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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 02:49:36,281 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 634 transitions. [2022-02-24 02:49:36,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 02:49:36,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:36,282 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:49:36,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 02:49:36,282 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:36,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:36,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1331008261, now seen corresponding path program 26 times [2022-02-24 02:49:36,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:36,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616368839] [2022-02-24 02:49:36,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:36,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:36,284 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:36,285 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:36,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:36,522 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:36,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616368839] [2022-02-24 02:49:36,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1616368839] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:36,522 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:36,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:49:36,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075946486] [2022-02-24 02:49:36,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:36,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:49:36,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:36,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:49:36,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:49:36,523 INFO L87 Difference]: Start difference. First operand 555 states and 634 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 02:49:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:44,169 INFO L93 Difference]: Finished difference Result 3249 states and 3755 transitions. [2022-02-24 02:49:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:49:44,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 81 [2022-02-24 02:49:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:44,173 INFO L225 Difference]: With dead ends: 3249 [2022-02-24 02:49:44,173 INFO L226 Difference]: Without dead ends: 3200 [2022-02-24 02:49:44,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-02-24 02:49:44,174 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 437 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:44,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 261 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3016 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 02:49:44,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2022-02-24 02:49:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 555. [2022-02-24 02:49:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 550 states have (on average 1.1454545454545455) internal successors, (630), 550 states have internal predecessors, (630), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 634 transitions. [2022-02-24 02:49:45,112 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 634 transitions. Word has length 81 [2022-02-24 02:49:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:45,112 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 634 transitions. [2022-02-24 02:49:45,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 02:49:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 634 transitions. [2022-02-24 02:49:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 02:49:45,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:45,113 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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 02:49:45,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 02:49:45,114 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:45,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:45,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1790824352, now seen corresponding path program 27 times [2022-02-24 02:49:45,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:45,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221215877] [2022-02-24 02:49:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:45,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:45,117 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:45,117 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:45,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:45,489 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 02:49:45,489 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:45,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221215877] [2022-02-24 02:49:45,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1221215877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:45,489 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:45,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:49:45,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536155367] [2022-02-24 02:49:45,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:45,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:49:45,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:45,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:49:45,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:49:45,490 INFO L87 Difference]: Start difference. First operand 555 states and 634 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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 02:49:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:46,993 INFO L93 Difference]: Finished difference Result 606 states and 689 transitions. [2022-02-24 02:49:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:49:46,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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 82 [2022-02-24 02:49:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:46,994 INFO L225 Difference]: With dead ends: 606 [2022-02-24 02:49:46,994 INFO L226 Difference]: Without dead ends: 401 [2022-02-24 02:49:46,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:49:46,995 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 182 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:46,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 41 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:49:46,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-24 02:49:47,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2022-02-24 02:49:47,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 396 states have (on average 1.1792929292929293) internal successors, (467), 396 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 471 transitions. [2022-02-24 02:49:47,676 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 471 transitions. Word has length 82 [2022-02-24 02:49:47,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:47,676 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 471 transitions. [2022-02-24 02:49:47,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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 02:49:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 471 transitions. [2022-02-24 02:49:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 02:49:47,677 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:47,677 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 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, 1] [2022-02-24 02:49:47,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 02:49:47,677 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:47,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:47,678 INFO L85 PathProgramCache]: Analyzing trace with hash 433083897, now seen corresponding path program 28 times [2022-02-24 02:49:47,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:47,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072986499] [2022-02-24 02:49:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:47,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:47,680 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:47,680 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:47,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:49:47,869 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:47,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072986499] [2022-02-24 02:49:47,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1072986499] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:47,869 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:47,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:49:47,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99443425] [2022-02-24 02:49:47,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:47,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:49:47,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:47,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:49:47,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:49:47,870 INFO L87 Difference]: Start difference. First operand 401 states and 471 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 02:49:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:49:53,189 INFO L93 Difference]: Finished difference Result 2227 states and 2586 transitions. [2022-02-24 02:49:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:49:53,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 82 [2022-02-24 02:49:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:49:53,192 INFO L225 Difference]: With dead ends: 2227 [2022-02-24 02:49:53,192 INFO L226 Difference]: Without dead ends: 2142 [2022-02-24 02:49:53,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:49:53,193 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 348 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:49:53,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 168 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:49:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2022-02-24 02:49:53,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 401. [2022-02-24 02:49:53,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 396 states have (on average 1.1792929292929293) internal successors, (467), 396 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:49:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 471 transitions. [2022-02-24 02:49:53,914 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 471 transitions. Word has length 82 [2022-02-24 02:49:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:49:53,914 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 471 transitions. [2022-02-24 02:49:53,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 02:49:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 471 transitions. [2022-02-24 02:49:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 02:49:53,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:49:53,915 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 5, 5, 4, 4, 3, 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 02:49:53,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 02:49:53,915 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:49:53,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:49:53,915 INFO L85 PathProgramCache]: Analyzing trace with hash -813744598, now seen corresponding path program 15 times [2022-02-24 02:49:53,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:49:53,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291174060] [2022-02-24 02:49:53,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:49:53,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:49:53,917 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:49:53,917 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:49:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:54,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:49:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:49:54,166 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 02:49:54,166 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:49:54,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291174060] [2022-02-24 02:49:54,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1291174060] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:49:54,166 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:49:54,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 02:49:54,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225122727] [2022-02-24 02:49:54,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:49:54,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 02:49:54,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:49:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 02:49:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:49:54,167 INFO L87 Difference]: Start difference. First operand 401 states and 471 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 02:50:05,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:05,281 INFO L93 Difference]: Finished difference Result 4284 states and 4984 transitions. [2022-02-24 02:50:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 02:50:05,281 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 82 [2022-02-24 02:50:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:05,285 INFO L225 Difference]: With dead ends: 4284 [2022-02-24 02:50:05,285 INFO L226 Difference]: Without dead ends: 4240 [2022-02-24 02:50:05,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 02:50:05,286 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 511 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5503 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 5529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 5503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:05,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 362 Invalid, 5529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 5503 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 02:50:05,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2022-02-24 02:50:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 403. [2022-02-24 02:50:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 398 states have (on average 1.1809045226130652) internal successors, (470), 398 states have internal predecessors, (470), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 474 transitions. [2022-02-24 02:50:06,090 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 474 transitions. Word has length 82 [2022-02-24 02:50:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:06,091 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 474 transitions. [2022-02-24 02:50:06,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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 02:50:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 474 transitions. [2022-02-24 02:50:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 02:50:06,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:06,092 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2022-02-24 02:50:06,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 02:50:06,092 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:06,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:06,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1126702179, now seen corresponding path program 29 times [2022-02-24 02:50:06,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:06,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710869640] [2022-02-24 02:50:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:06,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:06,095 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:06,095 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:07,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:07,209 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:07,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710869640] [2022-02-24 02:50:07,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1710869640] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:07,209 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:07,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 02:50:07,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044777696] [2022-02-24 02:50:07,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:07,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 02:50:07,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:07,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 02:50:07,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:50:07,210 INFO L87 Difference]: Start difference. First operand 403 states and 474 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:11,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:11,455 INFO L93 Difference]: Finished difference Result 1458 states and 1705 transitions. [2022-02-24 02:50:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 02:50:11,456 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-24 02:50:11,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:11,457 INFO L225 Difference]: With dead ends: 1458 [2022-02-24 02:50:11,457 INFO L226 Difference]: Without dead ends: 1264 [2022-02-24 02:50:11,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 02:50:11,458 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 345 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:11,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 92 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:50:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-02-24 02:50:12,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 578. [2022-02-24 02:50:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 573 states have (on average 1.169284467713787) internal successors, (670), 573 states have internal predecessors, (670), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 674 transitions. [2022-02-24 02:50:12,626 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 674 transitions. Word has length 83 [2022-02-24 02:50:12,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:12,626 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 674 transitions. [2022-02-24 02:50:12,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 674 transitions. [2022-02-24 02:50:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 02:50:12,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:12,627 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2022-02-24 02:50:12,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 02:50:12,628 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2049500001, now seen corresponding path program 30 times [2022-02-24 02:50:12,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:12,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775774357] [2022-02-24 02:50:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:12,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:12,631 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:12,631 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:13,944 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:13,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775774357] [2022-02-24 02:50:13,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [775774357] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:13,944 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:13,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:50:13,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006843044] [2022-02-24 02:50:13,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:13,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:50:13,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:50:13,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:50:13,945 INFO L87 Difference]: Start difference. First operand 578 states and 674 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:19,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:19,144 INFO L93 Difference]: Finished difference Result 1625 states and 1895 transitions. [2022-02-24 02:50:19,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 02:50:19,144 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-24 02:50:19,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:19,146 INFO L225 Difference]: With dead ends: 1625 [2022-02-24 02:50:19,146 INFO L226 Difference]: Without dead ends: 1419 [2022-02-24 02:50:19,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=341, Invalid=1915, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 02:50:19,147 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 503 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:19,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 108 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 02:50:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2022-02-24 02:50:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 688. [2022-02-24 02:50:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 683 states have (on average 1.16398243045388) internal successors, (795), 683 states have internal predecessors, (795), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 799 transitions. [2022-02-24 02:50:20,621 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 799 transitions. Word has length 83 [2022-02-24 02:50:20,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:20,621 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 799 transitions. [2022-02-24 02:50:20,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 799 transitions. [2022-02-24 02:50:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 02:50:20,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:20,622 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-24 02:50:20,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 02:50:20,623 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:20,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:20,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1737453601, now seen corresponding path program 31 times [2022-02-24 02:50:20,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:20,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857810891] [2022-02-24 02:50:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:20,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:20,626 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:20,626 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:21,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:21,170 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 02:50:21,171 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:21,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857810891] [2022-02-24 02:50:21,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [857810891] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:21,171 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:21,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:50:21,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652420132] [2022-02-24 02:50:21,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:21,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:50:21,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:50:21,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:50:21,175 INFO L87 Difference]: Start difference. First operand 688 states and 799 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 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 02:50:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:24,315 INFO L93 Difference]: Finished difference Result 1275 states and 1463 transitions. [2022-02-24 02:50:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:50:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 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 83 [2022-02-24 02:50:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:24,317 INFO L225 Difference]: With dead ends: 1275 [2022-02-24 02:50:24,317 INFO L226 Difference]: Without dead ends: 1200 [2022-02-24 02:50:24,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:50:24,318 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 220 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:24,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 50 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 02:50:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-02-24 02:50:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1008. [2022-02-24 02:50:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1003 states have (on average 1.152542372881356) internal successors, (1156), 1003 states have internal predecessors, (1156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1160 transitions. [2022-02-24 02:50:26,548 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1160 transitions. Word has length 83 [2022-02-24 02:50:26,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:26,549 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1160 transitions. [2022-02-24 02:50:26,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 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 02:50:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1160 transitions. [2022-02-24 02:50:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 02:50:26,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:26,551 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-02-24 02:50:26,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 02:50:26,551 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash -735580963, now seen corresponding path program 32 times [2022-02-24 02:50:26,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:26,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644642856] [2022-02-24 02:50:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:26,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:26,555 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:26,555 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:27,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:27,273 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:27,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644642856] [2022-02-24 02:50:27,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [644642856] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:27,273 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:27,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 02:50:27,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543636436] [2022-02-24 02:50:27,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:27,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 02:50:27,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:27,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 02:50:27,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-24 02:50:27,275 INFO L87 Difference]: Start difference. First operand 1008 states and 1160 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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 02:50:31,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:31,446 INFO L93 Difference]: Finished difference Result 1538 states and 1758 transitions. [2022-02-24 02:50:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:50:31,446 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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 83 [2022-02-24 02:50:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:31,448 INFO L225 Difference]: With dead ends: 1538 [2022-02-24 02:50:31,448 INFO L226 Difference]: Without dead ends: 1454 [2022-02-24 02:50:31,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:50:31,449 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 150 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:31,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 87 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:50:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-02-24 02:50:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1265. [2022-02-24 02:50:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1260 states have (on average 1.1468253968253967) internal successors, (1445), 1260 states have internal predecessors, (1445), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1449 transitions. [2022-02-24 02:50:34,333 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1449 transitions. Word has length 83 [2022-02-24 02:50:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:34,333 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 1449 transitions. [2022-02-24 02:50:34,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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 02:50:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1449 transitions. [2022-02-24 02:50:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 02:50:34,335 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:34,335 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 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, 1, 1] [2022-02-24 02:50:34,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 02:50:34,335 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:34,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:34,336 INFO L85 PathProgramCache]: Analyzing trace with hash 274871773, now seen corresponding path program 33 times [2022-02-24 02:50:34,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:34,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070034173] [2022-02-24 02:50:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:34,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:34,338 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:34,338 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:34,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:50:34,872 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:34,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070034173] [2022-02-24 02:50:34,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1070034173] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:34,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:34,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:50:34,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308493251] [2022-02-24 02:50:34,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:34,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:50:34,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:34,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:50:34,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:50:34,874 INFO L87 Difference]: Start difference. First operand 1265 states and 1449 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 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 02:50:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:38,988 INFO L93 Difference]: Finished difference Result 1555 states and 1766 transitions. [2022-02-24 02:50:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 02:50:38,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 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 83 [2022-02-24 02:50:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:38,990 INFO L225 Difference]: With dead ends: 1555 [2022-02-24 02:50:38,990 INFO L226 Difference]: Without dead ends: 1495 [2022-02-24 02:50:38,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:50:38,990 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 168 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:38,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 55 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:50:38,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2022-02-24 02:50:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1342. [2022-02-24 02:50:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1337 states have (on average 1.1361256544502618) internal successors, (1519), 1337 states have internal predecessors, (1519), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1523 transitions. [2022-02-24 02:50:42,225 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1523 transitions. Word has length 83 [2022-02-24 02:50:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:42,226 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 1523 transitions. [2022-02-24 02:50:42,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 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 02:50:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1523 transitions. [2022-02-24 02:50:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 02:50:42,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:42,227 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 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, 1, 1] [2022-02-24 02:50:42,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 02:50:42,228 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash 81092769, now seen corresponding path program 34 times [2022-02-24 02:50:42,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:42,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393821931] [2022-02-24 02:50:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:42,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:42,231 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:42,231 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:42,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:42,819 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 02:50:42,819 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:42,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393821931] [2022-02-24 02:50:42,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1393821931] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:42,819 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:42,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:50:42,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190304056] [2022-02-24 02:50:42,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:42,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:50:42,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:42,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:50:42,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:50:42,820 INFO L87 Difference]: Start difference. First operand 1342 states and 1523 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 02:50:46,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:46,973 INFO L93 Difference]: Finished difference Result 1549 states and 1753 transitions. [2022-02-24 02:50:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:50:46,974 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 83 [2022-02-24 02:50:46,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:46,975 INFO L225 Difference]: With dead ends: 1549 [2022-02-24 02:50:46,975 INFO L226 Difference]: Without dead ends: 1498 [2022-02-24 02:50:46,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-02-24 02:50:46,976 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 211 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:46,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 70 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:50:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-02-24 02:50:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1335. [2022-02-24 02:50:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1330 states have (on average 1.1345864661654135) internal successors, (1509), 1330 states have internal predecessors, (1509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:50:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1513 transitions. [2022-02-24 02:50:50,197 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1513 transitions. Word has length 83 [2022-02-24 02:50:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:50:50,198 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 1513 transitions. [2022-02-24 02:50:50,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 02:50:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1513 transitions. [2022-02-24 02:50:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 02:50:50,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:50:50,199 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2022-02-24 02:50:50,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 02:50:50,199 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:50:50,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:50:50,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1189511131, now seen corresponding path program 35 times [2022-02-24 02:50:50,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:50:50,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282384522] [2022-02-24 02:50:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:50:50,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:50:50,203 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:50:50,203 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:50:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:51,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:50:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:50:51,357 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 02:50:51,357 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:50:51,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282384522] [2022-02-24 02:50:51,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282384522] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:50:51,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:50:51,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 02:50:51,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104455433] [2022-02-24 02:50:51,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:50:51,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 02:50:51,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:50:51,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 02:50:51,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-24 02:50:51,358 INFO L87 Difference]: Start difference. First operand 1335 states and 1513 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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 02:50:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:50:59,300 INFO L93 Difference]: Finished difference Result 2454 states and 2762 transitions. [2022-02-24 02:50:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 02:50:59,301 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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 83 [2022-02-24 02:50:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:50:59,303 INFO L225 Difference]: With dead ends: 2454 [2022-02-24 02:50:59,303 INFO L226 Difference]: Without dead ends: 2449 [2022-02-24 02:50:59,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=412, Invalid=2240, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 02:50:59,304 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 324 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:50:59,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 119 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:50:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2022-02-24 02:51:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1335. [2022-02-24 02:51:02,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1330 states have (on average 1.1345864661654135) internal successors, (1509), 1330 states have internal predecessors, (1509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1513 transitions. [2022-02-24 02:51:02,490 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1513 transitions. Word has length 83 [2022-02-24 02:51:02,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:02,490 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 1513 transitions. [2022-02-24 02:51:02,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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 02:51:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1513 transitions. [2022-02-24 02:51:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 02:51:02,492 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:02,492 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2022-02-24 02:51:02,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 02:51:02,492 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:02,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:02,493 INFO L85 PathProgramCache]: Analyzing trace with hash 438642597, now seen corresponding path program 36 times [2022-02-24 02:51:02,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:02,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641829472] [2022-02-24 02:51:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:02,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:02,495 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:02,495 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:03,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:51:03,478 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:03,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641829472] [2022-02-24 02:51:03,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [641829472] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:03,479 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:03,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:51:03,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612518991] [2022-02-24 02:51:03,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:03,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:51:03,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:03,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:51:03,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:51:03,479 INFO L87 Difference]: Start difference. First operand 1335 states and 1513 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:11,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:11,089 INFO L93 Difference]: Finished difference Result 2394 states and 2696 transitions. [2022-02-24 02:51:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 02:51:11,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-24 02:51:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:11,093 INFO L225 Difference]: With dead ends: 2394 [2022-02-24 02:51:11,093 INFO L226 Difference]: Without dead ends: 2389 [2022-02-24 02:51:11,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 02:51:11,094 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 342 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:11,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 95 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:51:11,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2022-02-24 02:51:14,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 1335. [2022-02-24 02:51:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1330 states have (on average 1.1345864661654135) internal successors, (1509), 1330 states have internal predecessors, (1509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:14,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1513 transitions. [2022-02-24 02:51:14,517 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1513 transitions. Word has length 83 [2022-02-24 02:51:14,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:14,517 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 1513 transitions. [2022-02-24 02:51:14,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1513 transitions. [2022-02-24 02:51:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 02:51:14,518 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:14,519 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:51:14,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 02:51:14,519 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:14,519 INFO L85 PathProgramCache]: Analyzing trace with hash -393734198, now seen corresponding path program 37 times [2022-02-24 02:51:14,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:14,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926358894] [2022-02-24 02:51:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:14,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:14,521 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:14,521 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:14,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:14,781 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 02:51:14,781 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:14,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926358894] [2022-02-24 02:51:14,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [926358894] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:14,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:14,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 02:51:14,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583840896] [2022-02-24 02:51:14,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:14,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 02:51:14,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:14,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 02:51:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-02-24 02:51:14,782 INFO L87 Difference]: Start difference. First operand 1335 states and 1513 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 02:51:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:51:36,486 INFO L93 Difference]: Finished difference Result 7534 states and 8611 transitions. [2022-02-24 02:51:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 02:51:36,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 83 [2022-02-24 02:51:36,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:51:36,496 INFO L225 Difference]: With dead ends: 7534 [2022-02-24 02:51:36,497 INFO L226 Difference]: Without dead ends: 7485 [2022-02-24 02:51:36,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 02:51:36,498 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 429 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3530 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 3558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:51:36,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 273 Invalid, 3558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3530 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 02:51:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7485 states. [2022-02-24 02:51:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7485 to 1335. [2022-02-24 02:51:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1330 states have (on average 1.1345864661654135) internal successors, (1509), 1330 states have internal predecessors, (1509), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:51:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1513 transitions. [2022-02-24 02:51:39,953 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1513 transitions. Word has length 83 [2022-02-24 02:51:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:51:39,953 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 1513 transitions. [2022-02-24 02:51:39,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 02:51:39,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1513 transitions. [2022-02-24 02:51:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 02:51:39,954 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:51:39,955 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 5, 5, 4, 4, 3, 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 02:51:39,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 02:51:39,955 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:51:39,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:51:39,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1553814021, now seen corresponding path program 16 times [2022-02-24 02:51:39,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:51:39,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288832736] [2022-02-24 02:51:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:51:39,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:51:39,958 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:51:39,958 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:51:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:40,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:51:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:51:40,245 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 02:51:40,245 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:51:40,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288832736] [2022-02-24 02:51:40,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [288832736] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:51:40,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:51:40,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:51:40,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103531292] [2022-02-24 02:51:40,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:51:40,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:51:40,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:51:40,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:51:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:51:40,247 INFO L87 Difference]: Start difference. First operand 1335 states and 1513 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 02:52:11,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:11,538 INFO L93 Difference]: Finished difference Result 10567 states and 12115 transitions. [2022-02-24 02:52:11,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 02:52:11,539 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 84 [2022-02-24 02:52:11,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:11,550 INFO L225 Difference]: With dead ends: 10567 [2022-02-24 02:52:11,551 INFO L226 Difference]: Without dead ends: 10523 [2022-02-24 02:52:11,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 02:52:11,552 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 560 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 6236 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 6262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 6236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:11,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 386 Invalid, 6262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 6236 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 02:52:11,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10523 states. [2022-02-24 02:52:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10523 to 1337. [2022-02-24 02:52:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1332 states have (on average 1.135135135135135) internal successors, (1512), 1332 states have internal predecessors, (1512), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:14,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1516 transitions. [2022-02-24 02:52:14,936 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1516 transitions. Word has length 84 [2022-02-24 02:52:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:14,937 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 1516 transitions. [2022-02-24 02:52:14,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 02:52:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1516 transitions. [2022-02-24 02:52:14,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 02:52:14,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:14,938 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 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, 1] [2022-02-24 02:52:14,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 02:52:14,939 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:14,939 INFO L85 PathProgramCache]: Analyzing trace with hash -746829022, now seen corresponding path program 38 times [2022-02-24 02:52:14,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:14,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423368959] [2022-02-24 02:52:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:14,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:14,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:52:14,941 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:52:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:15,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:15,089 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:15,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423368959] [2022-02-24 02:52:15,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1423368959] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:15,089 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:15,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:52:15,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239870129] [2022-02-24 02:52:15,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:15,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:52:15,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:15,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:52:15,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:52:15,090 INFO L87 Difference]: Start difference. First operand 1337 states and 1516 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 02:52:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:24,198 INFO L93 Difference]: Finished difference Result 3396 states and 3861 transitions. [2022-02-24 02:52:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:52:24,198 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 85 [2022-02-24 02:52:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:24,201 INFO L225 Difference]: With dead ends: 3396 [2022-02-24 02:52:24,201 INFO L226 Difference]: Without dead ends: 3155 [2022-02-24 02:52:24,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:52:24,202 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 338 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:24,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 91 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:52:24,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2022-02-24 02:52:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 1527. [2022-02-24 02:52:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1522 states have (on average 1.135348226018397) internal successors, (1728), 1522 states have internal predecessors, (1728), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 1732 transitions. [2022-02-24 02:52:28,121 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 1732 transitions. Word has length 85 [2022-02-24 02:52:28,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:28,121 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 1732 transitions. [2022-02-24 02:52:28,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 02:52:28,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 1732 transitions. [2022-02-24 02:52:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 02:52:28,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:28,123 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:52:28,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 02:52:28,123 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:28,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:28,124 INFO L85 PathProgramCache]: Analyzing trace with hash -13861041, now seen corresponding path program 39 times [2022-02-24 02:52:28,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:28,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695059919] [2022-02-24 02:52:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:28,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:28,126 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:52:28,126 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:52:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:28,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:52:28,414 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:28,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695059919] [2022-02-24 02:52:28,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1695059919] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:28,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:28,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:52:28,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392129420] [2022-02-24 02:52:28,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:28,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:52:28,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:28,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:52:28,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:52:28,416 INFO L87 Difference]: Start difference. First operand 1527 states and 1732 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 02:52:53,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:52:53,496 INFO L93 Difference]: Finished difference Result 8290 states and 9477 transitions. [2022-02-24 02:52:53,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:52:53,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 85 [2022-02-24 02:52:53,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:52:53,506 INFO L225 Difference]: With dead ends: 8290 [2022-02-24 02:52:53,506 INFO L226 Difference]: Without dead ends: 8241 [2022-02-24 02:52:53,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:52:53,508 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 476 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3889 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 3919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:52:53,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 292 Invalid, 3919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3889 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 02:52:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8241 states. [2022-02-24 02:52:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8241 to 1527. [2022-02-24 02:52:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1522 states have (on average 1.135348226018397) internal successors, (1728), 1522 states have internal predecessors, (1728), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:52:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 1732 transitions. [2022-02-24 02:52:57,475 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 1732 transitions. Word has length 85 [2022-02-24 02:52:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:52:57,475 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 1732 transitions. [2022-02-24 02:52:57,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 02:52:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 1732 transitions. [2022-02-24 02:52:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 02:52:57,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:52:57,477 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 5, 5, 4, 4, 3, 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 02:52:57,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 02:52:57,477 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:52:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:52:57,477 INFO L85 PathProgramCache]: Analyzing trace with hash 444980000, now seen corresponding path program 17 times [2022-02-24 02:52:57,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:52:57,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483143451] [2022-02-24 02:52:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:52:57,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:52:57,480 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:52:57,480 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:52:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:57,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:52:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:52:57,762 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 02:52:57,762 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:52:57,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483143451] [2022-02-24 02:52:57,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [483143451] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:52:57,763 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:52:57,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 02:52:57,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549034470] [2022-02-24 02:52:57,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:52:57,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 02:52:57,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:52:57,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 02:52:57,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2022-02-24 02:52:57,764 INFO L87 Difference]: Start difference. First operand 1527 states and 1732 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:33,264 INFO L93 Difference]: Finished difference Result 11323 states and 12981 transitions. [2022-02-24 02:53:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 02:53:33,264 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-24 02:53:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:33,277 INFO L225 Difference]: With dead ends: 11323 [2022-02-24 02:53:33,277 INFO L226 Difference]: Without dead ends: 11279 [2022-02-24 02:53:33,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=1680, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:53:33,278 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 586 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7376 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 7403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 7376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:33,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 415 Invalid, 7403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 7376 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 02:53:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11279 states. [2022-02-24 02:53:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11279 to 1529. [2022-02-24 02:53:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1524 states have (on average 1.1358267716535433) internal successors, (1731), 1524 states have internal predecessors, (1731), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 1735 transitions. [2022-02-24 02:53:37,292 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 1735 transitions. Word has length 86 [2022-02-24 02:53:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:37,292 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 1735 transitions. [2022-02-24 02:53:37,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:37,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 1735 transitions. [2022-02-24 02:53:37,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-24 02:53:37,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:37,294 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 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, 1] [2022-02-24 02:53:37,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 02:53:37,295 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:37,295 INFO L85 PathProgramCache]: Analyzing trace with hash -760945305, now seen corresponding path program 40 times [2022-02-24 02:53:37,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:37,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074096152] [2022-02-24 02:53:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:37,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:37,297 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:53:37,297 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:53:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:37,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:37,460 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 02:53:37,460 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:37,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074096152] [2022-02-24 02:53:37,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1074096152] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:37,461 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:37,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 02:53:37,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195400396] [2022-02-24 02:53:37,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:37,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 02:53:37,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 02:53:37,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-24 02:53:37,462 INFO L87 Difference]: Start difference. First operand 1529 states and 1735 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 02:53:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:53:49,018 INFO L93 Difference]: Finished difference Result 4054 states and 4618 transitions. [2022-02-24 02:53:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 02:53:49,019 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 87 [2022-02-24 02:53:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:53:49,023 INFO L225 Difference]: With dead ends: 4054 [2022-02-24 02:53:49,023 INFO L226 Difference]: Without dead ends: 3813 [2022-02-24 02:53:49,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:53:49,024 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 275 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:53:49,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 128 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:53:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-02-24 02:53:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1529. [2022-02-24 02:53:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1524 states have (on average 1.1358267716535433) internal successors, (1731), 1524 states have internal predecessors, (1731), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:53:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 1735 transitions. [2022-02-24 02:53:53,091 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 1735 transitions. Word has length 87 [2022-02-24 02:53:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:53:53,091 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 1735 transitions. [2022-02-24 02:53:53,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 02:53:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 1735 transitions. [2022-02-24 02:53:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-24 02:53:53,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:53:53,093 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:53:53,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 02:53:53,093 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:53:53,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:53:53,094 INFO L85 PathProgramCache]: Analyzing trace with hash -27977324, now seen corresponding path program 41 times [2022-02-24 02:53:53,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:53:53,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469788551] [2022-02-24 02:53:53,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:53:53,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:53:53,097 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:53:53,097 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:53:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:53,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:53:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:53:53,347 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 02:53:53,348 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:53:53,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469788551] [2022-02-24 02:53:53,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [469788551] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:53:53,348 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:53:53,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 02:53:53,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345592896] [2022-02-24 02:53:53,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:53:53,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 02:53:53,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:53:53,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 02:53:53,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:53:53,349 INFO L87 Difference]: Start difference. First operand 1529 states and 1735 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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 02:54:22,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:54:22,626 INFO L93 Difference]: Finished difference Result 9046 states and 10343 transitions. [2022-02-24 02:54:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 02:54:22,627 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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 87 [2022-02-24 02:54:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:54:22,636 INFO L225 Difference]: With dead ends: 9046 [2022-02-24 02:54:22,636 INFO L226 Difference]: Without dead ends: 8997 [2022-02-24 02:54:22,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 02:54:22,638 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 516 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4509 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 4540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:54:22,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 316 Invalid, 4540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4509 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 02:54:22,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8997 states. [2022-02-24 02:54:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8997 to 1529. [2022-02-24 02:54:26,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1524 states have (on average 1.1358267716535433) internal successors, (1731), 1524 states have internal predecessors, (1731), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:54:26,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 1735 transitions. [2022-02-24 02:54:26,867 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 1735 transitions. Word has length 87 [2022-02-24 02:54:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:54:26,867 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 1735 transitions. [2022-02-24 02:54:26,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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 02:54:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 1735 transitions. [2022-02-24 02:54:26,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 02:54:26,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:54:26,869 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 5, 5, 4, 4, 3, 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 02:54:26,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 02:54:26,869 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:54:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:54:26,869 INFO L85 PathProgramCache]: Analyzing trace with hash 7375227, now seen corresponding path program 18 times [2022-02-24 02:54:26,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:54:26,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647661268] [2022-02-24 02:54:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:54:26,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:54:26,872 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:54:26,872 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:54:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:27,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:54:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:54:27,205 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 02:54:27,205 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:54:27,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647661268] [2022-02-24 02:54:27,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1647661268] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:54:27,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:54:27,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:54:27,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583651925] [2022-02-24 02:54:27,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:54:27,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:54:27,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:54:27,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:54:27,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:54:27,206 INFO L87 Difference]: Start difference. First operand 1529 states and 1735 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:55:08,012 INFO L93 Difference]: Finished difference Result 12079 states and 13847 transitions. [2022-02-24 02:55:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 02:55:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-02-24 02:55:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:55:08,028 INFO L225 Difference]: With dead ends: 12079 [2022-02-24 02:55:08,029 INFO L226 Difference]: Without dead ends: 12035 [2022-02-24 02:55:08,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 02:55:08,032 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 626 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 8224 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 8252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 8224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-24 02:55:08,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 439 Invalid, 8252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 8224 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-24 02:55:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12035 states. [2022-02-24 02:55:12,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12035 to 1531. [2022-02-24 02:55:12,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1526 states have (on average 1.1363040629095675) internal successors, (1734), 1526 states have internal predecessors, (1734), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 1738 transitions. [2022-02-24 02:55:12,340 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 1738 transitions. Word has length 88 [2022-02-24 02:55:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:55:12,340 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 1738 transitions. [2022-02-24 02:55:12,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 1738 transitions. [2022-02-24 02:55:12,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 02:55:12,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:55:12,342 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 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, 1] [2022-02-24 02:55:12,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 02:55:12,342 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:55:12,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:55:12,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1441791380, now seen corresponding path program 42 times [2022-02-24 02:55:12,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:55:12,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452186407] [2022-02-24 02:55:12,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:55:12,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:55:12,345 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:55:12,345 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:55:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:12,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:55:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:12,546 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 02:55:12,546 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:55:12,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452186407] [2022-02-24 02:55:12,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452186407] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:55:12,546 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:55:12,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 02:55:12,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372774921] [2022-02-24 02:55:12,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:55:12,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 02:55:12,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:55:12,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 02:55:12,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-24 02:55:12,547 INFO L87 Difference]: Start difference. First operand 1531 states and 1738 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 02:55:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:55:27,566 INFO L93 Difference]: Finished difference Result 4846 states and 5520 transitions. [2022-02-24 02:55:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 02:55:27,567 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 89 [2022-02-24 02:55:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:55:27,572 INFO L225 Difference]: With dead ends: 4846 [2022-02-24 02:55:27,572 INFO L226 Difference]: Without dead ends: 4605 [2022-02-24 02:55:27,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:55:27,573 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 358 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:55:27,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 137 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:55:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2022-02-24 02:55:31,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 1531. [2022-02-24 02:55:31,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1526 states have (on average 1.1363040629095675) internal successors, (1734), 1526 states have internal predecessors, (1734), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:55:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 1738 transitions. [2022-02-24 02:55:31,901 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 1738 transitions. Word has length 89 [2022-02-24 02:55:31,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:55:31,901 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 1738 transitions. [2022-02-24 02:55:31,909 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 02:55:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 1738 transitions. [2022-02-24 02:55:31,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 02:55:31,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:55:31,911 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:55:31,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 02:55:31,912 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:55:31,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:55:31,912 INFO L85 PathProgramCache]: Analyzing trace with hash -708823399, now seen corresponding path program 43 times [2022-02-24 02:55:31,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:55:31,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560442756] [2022-02-24 02:55:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:55:31,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:55:31,915 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:55:31,915 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:55:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:32,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:55:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:55:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:55:32,215 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:55:32,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560442756] [2022-02-24 02:55:32,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [560442756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:55:32,216 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:55:32,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 02:55:32,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698995081] [2022-02-24 02:55:32,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:55:32,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 02:55:32,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:55:32,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 02:55:32,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2022-02-24 02:55:32,217 INFO L87 Difference]: Start difference. First operand 1531 states and 1738 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 02:56:06,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:56:06,323 INFO L93 Difference]: Finished difference Result 9802 states and 11209 transitions. [2022-02-24 02:56:06,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 02:56:06,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 89 [2022-02-24 02:56:06,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:56:06,336 INFO L225 Difference]: With dead ends: 9802 [2022-02-24 02:56:06,336 INFO L226 Difference]: Without dead ends: 9753 [2022-02-24 02:56:06,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=1436, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 02:56:06,339 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 549 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 5459 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 5490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 5459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:56:06,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 345 Invalid, 5490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 5459 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 02:56:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9753 states. [2022-02-24 02:56:10,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9753 to 1531. [2022-02-24 02:56:10,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1526 states have (on average 1.1363040629095675) internal successors, (1734), 1526 states have internal predecessors, (1734), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:56:10,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 1738 transitions. [2022-02-24 02:56:10,773 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 1738 transitions. Word has length 89 [2022-02-24 02:56:10,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:56:10,773 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 1738 transitions. [2022-02-24 02:56:10,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 02:56:10,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 1738 transitions. [2022-02-24 02:56:10,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-24 02:56:10,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:56:10,775 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 5, 5, 4, 4, 3, 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 02:56:10,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 02:56:10,775 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:56:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:56:10,776 INFO L85 PathProgramCache]: Analyzing trace with hash 375983382, now seen corresponding path program 19 times [2022-02-24 02:56:10,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:56:10,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867439917] [2022-02-24 02:56:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:56:10,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:56:10,778 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:56:10,778 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:56:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:11,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:56:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:56:11,088 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 02:56:11,088 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:56:11,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867439917] [2022-02-24 02:56:11,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867439917] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:56:11,089 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:56:11,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 02:56:11,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029247813] [2022-02-24 02:56:11,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:56:11,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 02:56:11,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:56:11,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 02:56:11,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2022-02-24 02:56:11,090 INFO L87 Difference]: Start difference. First operand 1531 states and 1738 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 02:56:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:56:57,069 INFO L93 Difference]: Finished difference Result 12835 states and 14713 transitions. [2022-02-24 02:56:57,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 02:56:57,069 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 90 [2022-02-24 02:56:57,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:56:57,084 INFO L225 Difference]: With dead ends: 12835 [2022-02-24 02:56:57,085 INFO L226 Difference]: Without dead ends: 12791 [2022-02-24 02:56:57,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=2024, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 02:56:57,087 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 667 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 9118 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 9148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 9118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:56:57,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 463 Invalid, 9148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 9118 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-24 02:56:57,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12791 states. [2022-02-24 02:57:01,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12791 to 1533. [2022-02-24 02:57:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1528 states have (on average 1.1367801047120418) internal successors, (1737), 1528 states have internal predecessors, (1737), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 1741 transitions. [2022-02-24 02:57:01,535 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 1741 transitions. Word has length 90 [2022-02-24 02:57:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:57:01,535 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 1741 transitions. [2022-02-24 02:57:01,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 02:57:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 1741 transitions. [2022-02-24 02:57:01,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-24 02:57:01,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:57:01,547 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 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, 1] [2022-02-24 02:57:01,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 02:57:01,547 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:57:01,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:57:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1395126833, now seen corresponding path program 44 times [2022-02-24 02:57:01,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:57:01,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094252640] [2022-02-24 02:57:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:57:01,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:57:01,550 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:57:01,550 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:57:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:01,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:57:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:01,752 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 02:57:01,752 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:57:01,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094252640] [2022-02-24 02:57:01,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094252640] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:57:01,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:57:01,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 02:57:01,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362233171] [2022-02-24 02:57:01,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:57:01,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 02:57:01,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:57:01,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 02:57:01,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-24 02:57:01,753 INFO L87 Difference]: Start difference. First operand 1533 states and 1741 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 02:57:20,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:57:20,105 INFO L93 Difference]: Finished difference Result 5556 states and 6332 transitions. [2022-02-24 02:57:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 02:57:20,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 91 [2022-02-24 02:57:20,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:57:20,113 INFO L225 Difference]: With dead ends: 5556 [2022-02-24 02:57:20,113 INFO L226 Difference]: Without dead ends: 5315 [2022-02-24 02:57:20,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-02-24 02:57:20,115 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 368 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 02:57:20,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 171 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 02:57:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2022-02-24 02:57:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 1487. [2022-02-24 02:57:24,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1482 states have (on average 1.1356275303643724) internal successors, (1683), 1482 states have internal predecessors, (1683), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:57:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 1687 transitions. [2022-02-24 02:57:24,573 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 1687 transitions. Word has length 91 [2022-02-24 02:57:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:57:24,574 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 1687 transitions. [2022-02-24 02:57:24,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 02:57:24,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 1687 transitions. [2022-02-24 02:57:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-24 02:57:24,575 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:57:24,575 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-02-24 02:57:24,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 02:57:24,576 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:57:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:57:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2128094814, now seen corresponding path program 45 times [2022-02-24 02:57:24,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:57:24,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768147273] [2022-02-24 02:57:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:57:24,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:57:24,579 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:57:24,579 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:57:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:24,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:57:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:57:24,873 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 02:57:24,873 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:57:24,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768147273] [2022-02-24 02:57:24,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1768147273] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:57:24,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:57:24,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:57:24,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069770696] [2022-02-24 02:57:24,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:57:24,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:57:24,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:57:24,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:57:24,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:57:24,874 INFO L87 Difference]: Start difference. First operand 1487 states and 1687 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:03,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:58:03,993 INFO L93 Difference]: Finished difference Result 10558 states and 12075 transitions. [2022-02-24 02:58:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 02:58:03,993 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-02-24 02:58:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:58:04,006 INFO L225 Difference]: With dead ends: 10558 [2022-02-24 02:58:04,006 INFO L226 Difference]: Without dead ends: 10509 [2022-02-24 02:58:04,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 02:58:04,008 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 597 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 5852 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 5886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 5852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:58:04,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 362 Invalid, 5886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 5852 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 02:58:04,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10509 states. [2022-02-24 02:58:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10509 to 1487. [2022-02-24 02:58:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1482 states have (on average 1.1356275303643724) internal successors, (1683), 1482 states have internal predecessors, (1683), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 1687 transitions. [2022-02-24 02:58:08,534 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 1687 transitions. Word has length 91 [2022-02-24 02:58:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:58:08,534 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 1687 transitions. [2022-02-24 02:58:08,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 1687 transitions. [2022-02-24 02:58:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-24 02:58:08,536 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:58:08,536 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 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, 1, 1, 1, 1, 1, 1] [2022-02-24 02:58:08,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 02:58:08,537 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:58:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:58:08,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1388329719, now seen corresponding path program 46 times [2022-02-24 02:58:08,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:58:08,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082490327] [2022-02-24 02:58:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:58:08,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:58:08,540 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:58:08,541 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:58:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:08,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:58:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:08,667 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 02:58:08,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:58:08,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082490327] [2022-02-24 02:58:08,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2082490327] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:58:08,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:58:08,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 02:58:08,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146033432] [2022-02-24 02:58:08,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:58:08,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 02:58:08,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:58:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 02:58:08,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:58:08,668 INFO L87 Difference]: Start difference. First operand 1487 states and 1687 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 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 02:58:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:58:14,072 INFO L93 Difference]: Finished difference Result 2399 states and 2720 transitions. [2022-02-24 02:58:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:58:14,073 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 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 92 [2022-02-24 02:58:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:58:14,075 INFO L225 Difference]: With dead ends: 2399 [2022-02-24 02:58:14,075 INFO L226 Difference]: Without dead ends: 1533 [2022-02-24 02:58:14,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-24 02:58:14,076 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 142 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:58:14,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 95 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 02:58:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-02-24 02:58:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1290. [2022-02-24 02:58:18,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1285 states have (on average 1.1330739299610895) internal successors, (1456), 1285 states have internal predecessors, (1456), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:58:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1460 transitions. [2022-02-24 02:58:18,055 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1460 transitions. Word has length 92 [2022-02-24 02:58:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:58:18,055 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 1460 transitions. [2022-02-24 02:58:18,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 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 02:58:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1460 transitions. [2022-02-24 02:58:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-24 02:58:18,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:58:18,057 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 5, 5, 4, 4, 3, 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 02:58:18,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 02:58:18,057 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:58:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:58:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1873865231, now seen corresponding path program 20 times [2022-02-24 02:58:18,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:58:18,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536184394] [2022-02-24 02:58:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:58:18,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:58:18,060 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:58:18,060 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:58:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:18,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:58:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:58:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:58:18,406 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:58:18,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536184394] [2022-02-24 02:58:18,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1536184394] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:58:18,406 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:58:18,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 02:58:18,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909047072] [2022-02-24 02:58:18,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:58:18,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 02:58:18,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:58:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 02:58:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2022-02-24 02:58:18,407 INFO L87 Difference]: Start difference. First operand 1290 states and 1460 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:07,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:59:07,723 INFO L93 Difference]: Finished difference Result 12954 states and 14837 transitions. [2022-02-24 02:59:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 02:59:07,724 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-24 02:59:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:59:07,738 INFO L225 Difference]: With dead ends: 12954 [2022-02-24 02:59:07,738 INFO L226 Difference]: Without dead ends: 12910 [2022-02-24 02:59:07,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=2208, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 02:59:07,741 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 708 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 10058 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 10090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 10058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-24 02:59:07,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 487 Invalid, 10090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 10058 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-24 02:59:07,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12910 states. [2022-02-24 02:59:11,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12910 to 1292. [2022-02-24 02:59:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1287 states have (on average 1.1336441336441336) internal successors, (1459), 1287 states have internal predecessors, (1459), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 1463 transitions. [2022-02-24 02:59:11,833 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 1463 transitions. Word has length 92 [2022-02-24 02:59:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:59:11,834 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 1463 transitions. [2022-02-24 02:59:11,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 1463 transitions. [2022-02-24 02:59:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 02:59:11,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:59:11,835 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2022-02-24 02:59:11,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-24 02:59:11,835 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:59:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:59:11,836 INFO L85 PathProgramCache]: Analyzing trace with hash 162728781, now seen corresponding path program 47 times [2022-02-24 02:59:11,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:59:11,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497676838] [2022-02-24 02:59:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:59:11,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:59:11,838 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:59:11,838 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:59:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:11,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:59:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:59:11,995 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:59:11,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497676838] [2022-02-24 02:59:11,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1497676838] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:59:11,995 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:59:11,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 02:59:11,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997856857] [2022-02-24 02:59:11,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:59:11,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 02:59:11,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:59:11,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 02:59:11,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-24 02:59:11,996 INFO L87 Difference]: Start difference. First operand 1292 states and 1463 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:18,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:59:18,567 INFO L93 Difference]: Finished difference Result 1747 states and 1975 transitions. [2022-02-24 02:59:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 02:59:18,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-24 02:59:18,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:59:18,570 INFO L225 Difference]: With dead ends: 1747 [2022-02-24 02:59:18,570 INFO L226 Difference]: Without dead ends: 1742 [2022-02-24 02:59:18,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-24 02:59:18,570 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 258 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:59:18,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 186 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:59:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-02-24 02:59:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1477. [2022-02-24 02:59:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1472 states have (on average 1.1372282608695652) internal successors, (1674), 1472 states have internal predecessors, (1674), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 1678 transitions. [2022-02-24 02:59:23,548 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 1678 transitions. Word has length 93 [2022-02-24 02:59:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:59:23,548 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 1678 transitions. [2022-02-24 02:59:23,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 1678 transitions. [2022-02-24 02:59:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 02:59:23,550 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:59:23,550 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:59:23,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-24 02:59:23,550 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:59:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:59:23,551 INFO L85 PathProgramCache]: Analyzing trace with hash -424077233, now seen corresponding path program 48 times [2022-02-24 02:59:23,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:59:23,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007299347] [2022-02-24 02:59:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:59:23,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:59:23,554 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:59:23,554 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:59:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:24,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:59:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:59:24,195 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:59:24,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007299347] [2022-02-24 02:59:24,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2007299347] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:59:24,195 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:59:24,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 02:59:24,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118966351] [2022-02-24 02:59:24,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:59:24,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 02:59:24,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:59:24,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 02:59:24,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-24 02:59:24,196 INFO L87 Difference]: Start difference. First operand 1477 states and 1678 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:59:31,454 INFO L93 Difference]: Finished difference Result 1854 states and 2082 transitions. [2022-02-24 02:59:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:59:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-24 02:59:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:59:31,457 INFO L225 Difference]: With dead ends: 1854 [2022-02-24 02:59:31,457 INFO L226 Difference]: Without dead ends: 1813 [2022-02-24 02:59:31,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 02:59:31,457 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 263 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 02:59:31,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 76 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 02:59:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2022-02-24 02:59:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1585. [2022-02-24 02:59:36,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1580 states have (on average 1.1278481012658228) internal successors, (1782), 1580 states have internal predecessors, (1782), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 1786 transitions. [2022-02-24 02:59:36,850 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 1786 transitions. Word has length 93 [2022-02-24 02:59:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:59:36,851 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 1786 transitions. [2022-02-24 02:59:36,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 1786 transitions. [2022-02-24 02:59:36,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 02:59:36,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:59:36,853 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:59:36,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-24 02:59:36,853 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:59:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:59:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash 221262611, now seen corresponding path program 49 times [2022-02-24 02:59:36,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:59:36,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516120305] [2022-02-24 02:59:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:59:36,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:59:36,855 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:59:36,856 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:59:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:37,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:59:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:37,873 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 02:59:37,873 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:59:37,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516120305] [2022-02-24 02:59:37,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [516120305] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:59:37,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:59:37,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 02:59:37,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522359893] [2022-02-24 02:59:37,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:59:37,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 02:59:37,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:59:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 02:59:37,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-24 02:59:37,874 INFO L87 Difference]: Start difference. First operand 1585 states and 1786 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:59:45,628 INFO L93 Difference]: Finished difference Result 1838 states and 2062 transitions. [2022-02-24 02:59:45,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 02:59:45,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-24 02:59:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:59:45,631 INFO L225 Difference]: With dead ends: 1838 [2022-02-24 02:59:45,631 INFO L226 Difference]: Without dead ends: 1794 [2022-02-24 02:59:45,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 02:59:45,631 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 203 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 02:59:45,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 117 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 02:59:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-02-24 02:59:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1562. [2022-02-24 02:59:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1557 states have (on average 1.1297366730892742) internal successors, (1759), 1557 states have internal predecessors, (1759), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 1763 transitions. [2022-02-24 02:59:50,922 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 1763 transitions. Word has length 93 [2022-02-24 02:59:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:59:50,922 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 1763 transitions. [2022-02-24 02:59:50,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 1763 transitions. [2022-02-24 02:59:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 02:59:50,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:59:50,924 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:59:50,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-24 02:59:50,924 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:59:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:59:50,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1056215119, now seen corresponding path program 50 times [2022-02-24 02:59:50,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:59:50,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720054602] [2022-02-24 02:59:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:59:50,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:59:50,927 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:59:50,927 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:59:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:51,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:59:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:59:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:59:51,911 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:59:51,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720054602] [2022-02-24 02:59:51,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [720054602] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:59:51,912 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:59:51,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 02:59:51,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830860642] [2022-02-24 02:59:51,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:59:51,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 02:59:51,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:59:51,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 02:59:51,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-02-24 02:59:51,913 INFO L87 Difference]: Start difference. First operand 1562 states and 1763 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:59:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:59:59,760 INFO L93 Difference]: Finished difference Result 1817 states and 2037 transitions. [2022-02-24 02:59:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 02:59:59,760 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-24 02:59:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:59:59,762 INFO L225 Difference]: With dead ends: 1817 [2022-02-24 02:59:59,762 INFO L226 Difference]: Without dead ends: 1799 [2022-02-24 02:59:59,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 02:59:59,763 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 254 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 02:59:59,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 107 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 02:59:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-02-24 03:00:05,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1659. [2022-02-24 03:00:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1654 states have (on average 1.1221281741233373) internal successors, (1856), 1654 states have internal predecessors, (1856), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:00:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 1860 transitions. [2022-02-24 03:00:05,832 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 1860 transitions. Word has length 93 [2022-02-24 03:00:05,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:05,832 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 1860 transitions. [2022-02-24 03:00:05,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:00:05,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 1860 transitions. [2022-02-24 03:00:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 03:00:05,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:05,834 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:00:05,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-24 03:00:05,834 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:05,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:05,835 INFO L85 PathProgramCache]: Analyzing trace with hash 862436115, now seen corresponding path program 51 times [2022-02-24 03:00:05,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:05,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633737202] [2022-02-24 03:00:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:05,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:05,837 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 03:00:05,837 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:00:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:06,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:06,863 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 03:00:06,863 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:06,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633737202] [2022-02-24 03:00:06,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [633737202] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:06,863 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:06,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:00:06,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815498896] [2022-02-24 03:00:06,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:06,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:00:06,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:00:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:00:06,864 INFO L87 Difference]: Start difference. First operand 1659 states and 1860 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:00:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:00:14,900 INFO L93 Difference]: Finished difference Result 1806 states and 2022 transitions. [2022-02-24 03:00:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 03:00:14,901 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-24 03:00:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:00:14,903 INFO L225 Difference]: With dead ends: 1806 [2022-02-24 03:00:14,903 INFO L226 Difference]: Without dead ends: 1788 [2022-02-24 03:00:14,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 03:00:14,904 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 235 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:00:14,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 65 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:00:14,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2022-02-24 03:00:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1634. [2022-02-24 03:00:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1629 states have (on average 1.124002455494168) internal successors, (1831), 1629 states have internal predecessors, (1831), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:00:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 1835 transitions. [2022-02-24 03:00:21,011 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 1835 transitions. Word has length 93 [2022-02-24 03:00:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:00:21,011 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 1835 transitions. [2022-02-24 03:00:21,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:00:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 1835 transitions. [2022-02-24 03:00:21,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 03:00:21,013 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:00:21,014 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 4, 4, 3, 3, 3, 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, 1] [2022-02-24 03:00:21,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-24 03:00:21,014 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:00:21,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:00:21,014 INFO L85 PathProgramCache]: Analyzing trace with hash 369296566, now seen corresponding path program 52 times [2022-02-24 03:00:21,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:00:21,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762986235] [2022-02-24 03:00:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:00:21,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:00:21,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 03:00:21,017 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 03:00:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:21,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:00:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:00:21,206 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 03:00:21,206 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:00:21,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762986235] [2022-02-24 03:00:21,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1762986235] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:00:21,207 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:00:21,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:00:21,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976750060] [2022-02-24 03:00:21,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:00:21,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:00:21,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:00:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:00:21,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:00:21,208 INFO L87 Difference]: Start difference. First operand 1634 states and 1835 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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)