/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:31:21,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:31:21,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:31:21,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:31:21,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:31:21,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:31:21,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:31:21,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:31:21,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:31:21,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:31:21,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:31:21,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:31:21,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:31:21,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:31:21,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:31:21,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:31:21,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:31:21,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:31:21,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:31:21,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:31:21,275 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 19:31:21,282 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:31:21,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:31:21,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:31:21,284 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:31:21,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:31:21,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:31:21,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:31:21,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:31:21,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:31:21,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:31:21,284 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:31:21,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:31:21,285 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:31:21,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:31:21,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:31:21,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:31:21,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:31:21,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:31:21,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:31:21,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:31:21,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:31:21,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:31:21,286 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:31:21,286 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:31:21,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:31:21,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:31:21,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:31:21,491 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:31:21,492 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:31:21,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum5.c [2022-01-31 19:31:21,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00f881a45/68f28d15e7d44081abc0ca42c144d030/FLAG45fce22f0 [2022-01-31 19:31:21,905 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:31:21,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum5.c [2022-01-31 19:31:21,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00f881a45/68f28d15e7d44081abc0ca42c144d030/FLAG45fce22f0 [2022-01-31 19:31:22,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00f881a45/68f28d15e7d44081abc0ca42c144d030 [2022-01-31 19:31:22,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:31:22,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:31:22,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:31:22,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:31:22,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:31:22,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:31:22" (1/1) ... [2022-01-31 19:31:22,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414413b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:22, skipping insertion in model container [2022-01-31 19:31:22,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:31:22" (1/1) ... [2022-01-31 19:31:22,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:31:22,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:31:22,478 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum5.c[400,413] [2022-01-31 19:31:22,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:31:22,540 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:31:22,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum5.c[400,413] [2022-01-31 19:31:22,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:31:22,609 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:31:22,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:22 WrapperNode [2022-01-31 19:31:22,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:31:22,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:31:22,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:31:22,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:31:22,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:22" (1/1) ... [2022-01-31 19:31:22,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:22" (1/1) ... [2022-01-31 19:31:22,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:22" (1/1) ... [2022-01-31 19:31:22,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:22" (1/1) ... [2022-01-31 19:31:22,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:22" (1/1) ... [2022-01-31 19:31:22,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:22" (1/1) ... [2022-01-31 19:31:22,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:22" (1/1) ... [2022-01-31 19:31:22,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:31:22,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:31:22,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:31:22,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:31:22,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:22" (1/1) ... [2022-01-31 19:31:22,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:31:22,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:31:22,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 19:31:22,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 19:31:22,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:31:22,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:31:22,737 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:31:22,738 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 19:31:22,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:31:22,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:31:22,738 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:31:22,738 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:31:22,738 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:31:22,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:31:22,738 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 19:31:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:31:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 19:31:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:31:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 19:31:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:31:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:31:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:31:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:31:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:31:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:31:22,811 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:31:22,813 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:31:23,031 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:31:23,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:31:23,040 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-01-31 19:31:23,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:31:23 BoogieIcfgContainer [2022-01-31 19:31:23,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:31:23,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:31:23,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:31:23,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:31:23,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:31:22" (1/3) ... [2022-01-31 19:31:23,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21819329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:31:23, skipping insertion in model container [2022-01-31 19:31:23,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:22" (2/3) ... [2022-01-31 19:31:23,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21819329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:31:23, skipping insertion in model container [2022-01-31 19:31:23,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:31:23" (3/3) ... [2022-01-31 19:31:23,047 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2022-01-31 19:31:23,051 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:31:23,051 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:31:23,088 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:31:23,094 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 19:31:23,095 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:31:23,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 45 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 19:31:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 19:31:23,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:23,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:23,115 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:23,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1538774170, now seen corresponding path program 1 times [2022-01-31 19:31:23,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:23,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952092442] [2022-01-31 19:31:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:23,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:23,167 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:23,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:23,335 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:23,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952092442] [2022-01-31 19:31:23,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [952092442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:23,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:23,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:31:23,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84405316] [2022-01-31 19:31:23,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:23,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:31:23,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:23,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:31:23,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:31:23,374 INFO L87 Difference]: Start difference. First operand has 52 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 45 states have internal predecessors, (69), 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 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:23,520 INFO L93 Difference]: Finished difference Result 97 states and 143 transitions. [2022-01-31 19:31:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 19:31:23,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 19:31:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:23,530 INFO L225 Difference]: With dead ends: 97 [2022-01-31 19:31:23,530 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 19:31:23,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:31:23,537 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:23,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 95 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 19:31:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-01-31 19:31:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-01-31 19:31:23,585 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 32 [2022-01-31 19:31:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:23,585 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-01-31 19:31:23,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-01-31 19:31:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 19:31:23,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:23,588 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:23,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:31:23,589 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:23,589 INFO L85 PathProgramCache]: Analyzing trace with hash -281038688, now seen corresponding path program 1 times [2022-01-31 19:31:23,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:23,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168952411] [2022-01-31 19:31:23,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:23,611 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:23,611 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:23,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:23,617 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:23,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:23,729 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:23,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168952411] [2022-01-31 19:31:23,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1168952411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:23,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:23,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:31:23,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119825137] [2022-01-31 19:31:23,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:23,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:31:23,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:23,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:31:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:31:23,732 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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) [2022-01-31 19:31:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:23,901 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2022-01-31 19:31:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:31:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 19:31:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:23,905 INFO L225 Difference]: With dead ends: 97 [2022-01-31 19:31:23,905 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 19:31:23,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:31:23,911 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 67 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:23,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 29 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 19:31:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-01-31 19:31:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-01-31 19:31:23,927 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 34 [2022-01-31 19:31:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:23,928 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-01-31 19:31:23,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 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) [2022-01-31 19:31:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-01-31 19:31:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 19:31:23,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:23,929 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, 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, 1, 1, 1] [2022-01-31 19:31:23,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:31:23,930 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:23,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:23,930 INFO L85 PathProgramCache]: Analyzing trace with hash -670903156, now seen corresponding path program 1 times [2022-01-31 19:31:23,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:23,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967279232] [2022-01-31 19:31:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:23,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:23,942 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:23,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:23,943 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:24,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:24,077 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:24,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967279232] [2022-01-31 19:31:24,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1967279232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:24,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:24,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:31:24,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522615793] [2022-01-31 19:31:24,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:24,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:31:24,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:31:24,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:31:24,082 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 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) [2022-01-31 19:31:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:24,170 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2022-01-31 19:31:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:31:24,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 19:31:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:24,173 INFO L225 Difference]: With dead ends: 102 [2022-01-31 19:31:24,173 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 19:31:24,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:31:24,181 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:24,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 79 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 19:31:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-31 19:31:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-01-31 19:31:24,202 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2022-01-31 19:31:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:24,203 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-01-31 19:31:24,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 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) [2022-01-31 19:31:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-01-31 19:31:24,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 19:31:24,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:24,206 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1] [2022-01-31 19:31:24,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:31:24,207 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:24,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:24,207 INFO L85 PathProgramCache]: Analyzing trace with hash 308089514, now seen corresponding path program 2 times [2022-01-31 19:31:24,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:24,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721457861] [2022-01-31 19:31:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:24,210 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:24,210 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:24,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:24,211 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:24,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:24,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721457861] [2022-01-31 19:31:24,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [721457861] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:24,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:24,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:31:24,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046209726] [2022-01-31 19:31:24,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:24,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:31:24,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:24,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:31:24,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:31:24,283 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 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) [2022-01-31 19:31:24,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:24,444 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2022-01-31 19:31:24,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:31:24,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 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 56 [2022-01-31 19:31:24,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:24,446 INFO L225 Difference]: With dead ends: 118 [2022-01-31 19:31:24,446 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 19:31:24,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:31:24,447 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:24,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 33 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 19:31:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-01-31 19:31:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2022-01-31 19:31:24,457 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 56 [2022-01-31 19:31:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:24,457 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2022-01-31 19:31:24,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 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) [2022-01-31 19:31:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2022-01-31 19:31:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 19:31:24,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:24,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:24,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:31:24,459 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1983085974, now seen corresponding path program 3 times [2022-01-31 19:31:24,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:24,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254622442] [2022-01-31 19:31:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:24,462 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:24,462 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:24,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:24,463 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:26,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:26,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:26,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254622442] [2022-01-31 19:31:26,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254622442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:26,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:26,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:31:26,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180394987] [2022-01-31 19:31:26,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:26,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:31:26,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:26,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:31:26,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:31:26,355 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 16 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) [2022-01-31 19:31:26,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:26,893 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2022-01-31 19:31:26,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:31:26,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 16 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 19:31:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:26,895 INFO L225 Difference]: With dead ends: 139 [2022-01-31 19:31:26,895 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 19:31:26,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 23 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:31:26,896 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:26,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 222 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:31:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 19:31:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2022-01-31 19:31:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.16) internal successors, (145), 125 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2022-01-31 19:31:26,915 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 76 [2022-01-31 19:31:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:26,916 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2022-01-31 19:31:26,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 16 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) [2022-01-31 19:31:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2022-01-31 19:31:26,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 19:31:26,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:26,917 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:26,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:31:26,918 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:26,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1296326476, now seen corresponding path program 4 times [2022-01-31 19:31:26,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:26,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050820549] [2022-01-31 19:31:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:26,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:26,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:26,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:26,922 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:26,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:26,994 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:26,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050820549] [2022-01-31 19:31:26,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1050820549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:26,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:26,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:31:26,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570153717] [2022-01-31 19:31:26,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:26,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:31:26,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:26,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:31:26,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:31:26,996 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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) [2022-01-31 19:31:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:27,286 INFO L93 Difference]: Finished difference Result 254 states and 292 transitions. [2022-01-31 19:31:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:31:27,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 78 [2022-01-31 19:31:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:27,293 INFO L225 Difference]: With dead ends: 254 [2022-01-31 19:31:27,293 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 19:31:27,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:31:27,298 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:27,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 104 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:31:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 19:31:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-01-31 19:31:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 127 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) [2022-01-31 19:31:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 151 transitions. [2022-01-31 19:31:27,317 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 151 transitions. Word has length 78 [2022-01-31 19:31:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:27,317 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 151 transitions. [2022-01-31 19:31:27,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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) [2022-01-31 19:31:27,317 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 151 transitions. [2022-01-31 19:31:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 19:31:27,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:27,319 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:27,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:31:27,319 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash 795141330, now seen corresponding path program 5 times [2022-01-31 19:31:27,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:27,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67698919] [2022-01-31 19:31:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:27,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:27,322 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:27,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:27,323 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:27,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:27,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:27,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67698919] [2022-01-31 19:31:27,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [67698919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:27,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:27,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:31:27,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042210363] [2022-01-31 19:31:27,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:27,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:31:27,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:31:27,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:31:27,406 INFO L87 Difference]: Start difference. First operand 132 states and 151 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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) [2022-01-31 19:31:27,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:27,639 INFO L93 Difference]: Finished difference Result 205 states and 241 transitions. [2022-01-31 19:31:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:31:27,640 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 80 [2022-01-31 19:31:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:27,641 INFO L225 Difference]: With dead ends: 205 [2022-01-31 19:31:27,641 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 19:31:27,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:31:27,645 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 167 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:27,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 59 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:31:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 19:31:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-01-31 19:31:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2022-01-31 19:31:27,667 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 80 [2022-01-31 19:31:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:27,672 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2022-01-31 19:31:27,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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) [2022-01-31 19:31:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2022-01-31 19:31:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 19:31:27,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:27,674 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:27,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:31:27,674 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:27,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:27,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1460511520, now seen corresponding path program 6 times [2022-01-31 19:31:27,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:27,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176121132] [2022-01-31 19:31:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:27,678 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:27,678 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:27,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:27,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:31,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:31,349 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:31,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176121132] [2022-01-31 19:31:31,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1176121132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:31,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:31,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 19:31:31,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789675356] [2022-01-31 19:31:31,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:31,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 19:31:31,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 19:31:31,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2804, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:31:31,352 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 54 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:36,911 INFO L93 Difference]: Finished difference Result 311 states and 351 transitions. [2022-01-31 19:31:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:31:36,912 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 54 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 19:31:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:36,913 INFO L225 Difference]: With dead ends: 311 [2022-01-31 19:31:36,913 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 19:31:36,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 13 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=836, Invalid=7536, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 19:31:36,917 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 239 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 4335 mSolverCounterSat, 1194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 5529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1194 IncrementalHoareTripleChecker+Valid, 4335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:36,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 327 Invalid, 5529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1194 Valid, 4335 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 19:31:36,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 19:31:36,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 170. [2022-01-31 19:31:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.121212121212121) internal successors, (185), 165 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 189 transitions. [2022-01-31 19:31:36,983 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 189 transitions. Word has length 98 [2022-01-31 19:31:36,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:36,984 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 189 transitions. [2022-01-31 19:31:36,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 54 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 189 transitions. [2022-01-31 19:31:36,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:31:36,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:36,988 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:36,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:31:36,989 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:36,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash 109217116, now seen corresponding path program 7 times [2022-01-31 19:31:36,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:36,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365953347] [2022-01-31 19:31:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:36,991 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:36,991 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:36,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:36,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:37,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:37,086 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:37,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365953347] [2022-01-31 19:31:37,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [365953347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:37,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:37,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:31:37,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722645637] [2022-01-31 19:31:37,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:37,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:31:37,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:37,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:31:37,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:31:37,088 INFO L87 Difference]: Start difference. First operand 170 states and 189 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 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) [2022-01-31 19:31:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:37,370 INFO L93 Difference]: Finished difference Result 259 states and 295 transitions. [2022-01-31 19:31:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:31:37,370 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 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 102 [2022-01-31 19:31:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:37,371 INFO L225 Difference]: With dead ends: 259 [2022-01-31 19:31:37,371 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 19:31:37,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:31:37,372 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 206 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:37,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 69 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:31:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 19:31:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-01-31 19:31:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 116 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2022-01-31 19:31:37,388 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 102 [2022-01-31 19:31:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:37,389 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2022-01-31 19:31:37,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 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) [2022-01-31 19:31:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2022-01-31 19:31:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:31:37,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:37,390 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-01-31 19:31:37,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:31:37,391 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:37,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1874912554, now seen corresponding path program 8 times [2022-01-31 19:31:37,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:37,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105049295] [2022-01-31 19:31:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:37,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:37,393 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:37,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:37,394 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:42,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:42,479 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:42,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105049295] [2022-01-31 19:31:42,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1105049295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:42,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:42,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 19:31:42,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6166180] [2022-01-31 19:31:42,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:42,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 19:31:42,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:42,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 19:31:42,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=4916, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:31:42,484 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 73 states, 73 states have (on average 1.5890410958904109) internal successors, (116), 71 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:50,228 INFO L93 Difference]: Finished difference Result 371 states and 411 transitions. [2022-01-31 19:31:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:31:50,229 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.5890410958904109) internal successors, (116), 71 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-01-31 19:31:50,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:50,230 INFO L225 Difference]: With dead ends: 371 [2022-01-31 19:31:50,230 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 19:31:50,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3374 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=978, Invalid=12362, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 19:31:50,234 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 248 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 6846 mSolverCounterSat, 1326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 8172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1326 IncrementalHoareTripleChecker+Valid, 6846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:50,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 388 Invalid, 8172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1326 Valid, 6846 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-01-31 19:31:50,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 19:31:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 208. [2022-01-31 19:31:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 203 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 227 transitions. [2022-01-31 19:31:50,270 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 227 transitions. Word has length 120 [2022-01-31 19:31:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:50,270 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 227 transitions. [2022-01-31 19:31:50,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.5890410958904109) internal successors, (116), 71 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 227 transitions. [2022-01-31 19:31:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 19:31:50,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:50,272 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-01-31 19:31:50,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:31:50,272 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash -833944986, now seen corresponding path program 9 times [2022-01-31 19:31:50,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:50,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137280733] [2022-01-31 19:31:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:50,275 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:50,275 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:50,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:50,277 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:50,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:50,390 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:50,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137280733] [2022-01-31 19:31:50,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2137280733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:50,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:50,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:31:50,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073591729] [2022-01-31 19:31:50,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:50,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:31:50,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:50,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:31:50,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:31:50,392 INFO L87 Difference]: Start difference. First operand 208 states and 227 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:50,712 INFO L93 Difference]: Finished difference Result 313 states and 349 transitions. [2022-01-31 19:31:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:31:50,712 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 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 124 [2022-01-31 19:31:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:50,713 INFO L225 Difference]: With dead ends: 313 [2022-01-31 19:31:50,713 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 19:31:50,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:31:50,714 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 245 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:50,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 63 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:31:50,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 19:31:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-01-31 19:31:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0797101449275361) internal successors, (149), 138 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2022-01-31 19:31:50,732 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 124 [2022-01-31 19:31:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:50,733 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2022-01-31 19:31:50,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,733 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2022-01-31 19:31:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 19:31:50,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:50,734 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:50,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:31:50,734 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:50,735 INFO L85 PathProgramCache]: Analyzing trace with hash -234560588, now seen corresponding path program 10 times [2022-01-31 19:31:50,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:50,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325772641] [2022-01-31 19:31:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:50,737 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:50,737 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:50,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:50,738 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:58,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:58,448 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:58,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325772641] [2022-01-31 19:31:58,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1325772641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:58,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:58,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 19:31:58,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790299714] [2022-01-31 19:31:58,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:58,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 19:31:58,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:58,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 19:31:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=8248, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 19:31:58,452 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 94 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 92 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:12,826 INFO L93 Difference]: Finished difference Result 307 states and 338 transitions. [2022-01-31 19:32:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 19:32:12,827 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 92 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 19:32:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:12,829 INFO L225 Difference]: With dead ends: 307 [2022-01-31 19:32:12,829 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 19:32:12,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5716 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1768, Invalid=22412, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 19:32:12,834 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 336 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 9412 mSolverCounterSat, 2142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 11554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2142 IncrementalHoareTripleChecker+Valid, 9412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:12,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 428 Invalid, 11554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2142 Valid, 9412 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-01-31 19:32:12,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 19:32:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 148. [2022-01-31 19:32:12,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.083916083916084) internal successors, (155), 143 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 159 transitions. [2022-01-31 19:32:12,882 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 159 transitions. Word has length 142 [2022-01-31 19:32:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:12,882 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 159 transitions. [2022-01-31 19:32:12,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 92 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 159 transitions. [2022-01-31 19:32:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 19:32:12,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:12,884 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:12,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:32:12,884 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1090636462, now seen corresponding path program 11 times [2022-01-31 19:32:12,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:12,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178676246] [2022-01-31 19:32:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:12,886 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:12,886 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:12,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:12,887 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:13,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:13,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:13,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178676246] [2022-01-31 19:32:13,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [178676246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:13,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:13,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:32:13,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495371296] [2022-01-31 19:32:13,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:13,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:32:13,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:13,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:32:13,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:32:13,032 INFO L87 Difference]: Start difference. First operand 148 states and 159 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:13,559 INFO L93 Difference]: Finished difference Result 391 states and 422 transitions. [2022-01-31 19:32:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:32:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-01-31 19:32:13,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:13,560 INFO L225 Difference]: With dead ends: 391 [2022-01-31 19:32:13,560 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 19:32:13,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:32:13,561 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 127 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:13,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 123 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:32:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 19:32:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-01-31 19:32:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0827586206896551) internal successors, (157), 145 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 161 transitions. [2022-01-31 19:32:13,610 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 161 transitions. Word has length 144 [2022-01-31 19:32:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:13,610 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 161 transitions. [2022-01-31 19:32:13,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 161 transitions. [2022-01-31 19:32:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 19:32:13,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:13,611 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:13,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:32:13,611 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:13,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:13,611 INFO L85 PathProgramCache]: Analyzing trace with hash 317913584, now seen corresponding path program 12 times [2022-01-31 19:32:13,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:13,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244004106] [2022-01-31 19:32:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:13,613 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:13,613 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:13,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:13,614 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:13,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:13,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:13,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244004106] [2022-01-31 19:32:13,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1244004106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:13,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:13,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:32:13,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425612015] [2022-01-31 19:32:13,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:13,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:32:13,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:32:13,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:32:13,749 INFO L87 Difference]: Start difference. First operand 150 states and 161 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:14,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:14,161 INFO L93 Difference]: Finished difference Result 283 states and 312 transitions. [2022-01-31 19:32:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:32:14,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-01-31 19:32:14,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:14,162 INFO L225 Difference]: With dead ends: 283 [2022-01-31 19:32:14,162 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 19:32:14,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:32:14,163 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 420 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:14,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 59 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:32:14,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 19:32:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-01-31 19:32:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.06875) internal successors, (171), 160 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2022-01-31 19:32:14,232 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 146 [2022-01-31 19:32:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:14,232 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2022-01-31 19:32:14,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:14,232 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2022-01-31 19:32:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:32:14,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:14,233 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1] [2022-01-31 19:32:14,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:32:14,233 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:14,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:14,234 INFO L85 PathProgramCache]: Analyzing trace with hash 907624126, now seen corresponding path program 13 times [2022-01-31 19:32:14,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:14,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681761683] [2022-01-31 19:32:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:14,235 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:14,236 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:14,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:14,236 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:26,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:26,631 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:26,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681761683] [2022-01-31 19:32:26,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [681761683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:26,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:26,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 19:32:26,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542439813] [2022-01-31 19:32:26,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:26,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 19:32:26,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:26,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 19:32:26,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=10464, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 19:32:26,634 INFO L87 Difference]: Start difference. First operand 165 states and 175 transitions. Second operand has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:41,218 INFO L93 Difference]: Finished difference Result 486 states and 526 transitions. [2022-01-31 19:32:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 19:32:41,219 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-01-31 19:32:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:41,221 INFO L225 Difference]: With dead ends: 486 [2022-01-31 19:32:41,221 INFO L226 Difference]: Without dead ends: 481 [2022-01-31 19:32:41,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 28 SyntacticMatches, 9 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8438 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=2375, Invalid=28075, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 19:32:41,225 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 200 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 9975 mSolverCounterSat, 2066 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 12041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2066 IncrementalHoareTripleChecker+Valid, 9975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:41,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 424 Invalid, 12041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2066 Valid, 9975 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-01-31 19:32:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-31 19:32:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 388. [2022-01-31 19:32:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 383 states have (on average 1.080939947780679) internal successors, (414), 383 states have internal predecessors, (414), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 418 transitions. [2022-01-31 19:32:41,392 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 418 transitions. Word has length 164 [2022-01-31 19:32:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:41,392 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 418 transitions. [2022-01-31 19:32:41,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 418 transitions. [2022-01-31 19:32:41,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 19:32:41,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:41,394 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1] [2022-01-31 19:32:41,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:32:41,394 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:41,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:41,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1726171172, now seen corresponding path program 14 times [2022-01-31 19:32:41,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:41,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576467725] [2022-01-31 19:32:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:41,396 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:41,396 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:41,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:41,397 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:41,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:41,565 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:41,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576467725] [2022-01-31 19:32:41,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [576467725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:41,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:41,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:32:41,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882627543] [2022-01-31 19:32:41,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:41,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:32:41,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:41,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:32:41,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:32:41,567 INFO L87 Difference]: Start difference. First operand 388 states and 418 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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) [2022-01-31 19:32:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:42,380 INFO L93 Difference]: Finished difference Result 859 states and 926 transitions. [2022-01-31 19:32:42,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:32:42,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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 166 [2022-01-31 19:32:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:42,382 INFO L225 Difference]: With dead ends: 859 [2022-01-31 19:32:42,382 INFO L226 Difference]: Without dead ends: 391 [2022-01-31 19:32:42,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:32:42,383 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 160 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:42,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 132 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:32:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-31 19:32:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 390. [2022-01-31 19:32:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 385 states have (on average 1.0805194805194804) internal successors, (416), 385 states have internal predecessors, (416), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 420 transitions. [2022-01-31 19:32:42,544 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 420 transitions. Word has length 166 [2022-01-31 19:32:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:42,545 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 420 transitions. [2022-01-31 19:32:42,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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) [2022-01-31 19:32:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 420 transitions. [2022-01-31 19:32:42,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 19:32:42,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:42,546 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1] [2022-01-31 19:32:42,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:32:42,546 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:42,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:42,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2113728006, now seen corresponding path program 15 times [2022-01-31 19:32:42,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:42,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836637904] [2022-01-31 19:32:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:42,549 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:42,549 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:42,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:42,550 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:42,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:42,719 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:42,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836637904] [2022-01-31 19:32:42,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1836637904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:42,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:42,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:32:42,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273381645] [2022-01-31 19:32:42,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:42,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:32:42,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:42,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:32:42,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:32:42,721 INFO L87 Difference]: Start difference. First operand 390 states and 420 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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) [2022-01-31 19:32:43,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:43,319 INFO L93 Difference]: Finished difference Result 525 states and 571 transitions. [2022-01-31 19:32:43,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:32:43,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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 168 [2022-01-31 19:32:43,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:43,320 INFO L225 Difference]: With dead ends: 525 [2022-01-31 19:32:43,320 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 19:32:43,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:32:43,321 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 543 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:43,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 61 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:32:43,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 19:32:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-01-31 19:32:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0604395604395604) internal successors, (193), 182 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 197 transitions. [2022-01-31 19:32:43,426 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 197 transitions. Word has length 168 [2022-01-31 19:32:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:43,426 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 197 transitions. [2022-01-31 19:32:43,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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) [2022-01-31 19:32:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 197 transitions. [2022-01-31 19:32:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 19:32:43,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:43,427 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1] [2022-01-31 19:32:43,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:32:43,427 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash 616928840, now seen corresponding path program 16 times [2022-01-31 19:32:43,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:43,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071390391] [2022-01-31 19:32:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:43,430 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:43,430 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:43,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:43,432 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:58,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:58,256 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:58,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071390391] [2022-01-31 19:32:58,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2071390391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:58,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:58,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 19:32:58,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208723984] [2022-01-31 19:32:58,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:58,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 19:32:58,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:58,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 19:32:58,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=13074, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 19:32:58,258 INFO L87 Difference]: Start difference. First operand 187 states and 197 transitions. Second operand has 119 states, 119 states have (on average 1.5294117647058822) internal successors, (182), 117 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:13,646 INFO L93 Difference]: Finished difference Result 551 states and 591 transitions. [2022-01-31 19:33:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 19:33:13,646 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.5294117647058822) internal successors, (182), 117 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-01-31 19:33:13,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:13,648 INFO L225 Difference]: With dead ends: 551 [2022-01-31 19:33:13,648 INFO L226 Difference]: Without dead ends: 346 [2022-01-31 19:33:13,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 22 SyntacticMatches, 31 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12697 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=2688, Invalid=31352, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 19:33:13,650 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 150 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 13878 mSolverCounterSat, 2276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 16154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2276 IncrementalHoareTripleChecker+Valid, 13878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:13,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 542 Invalid, 16154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2276 Valid, 13878 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-01-31 19:33:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-31 19:33:13,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 322. [2022-01-31 19:33:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 317 states have (on average 1.0630914826498423) internal successors, (337), 317 states have internal predecessors, (337), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 341 transitions. [2022-01-31 19:33:13,868 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 341 transitions. Word has length 186 [2022-01-31 19:33:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:13,868 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 341 transitions. [2022-01-31 19:33:13,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.5294117647058822) internal successors, (182), 117 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 341 transitions. [2022-01-31 19:33:13,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 19:33:13,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:13,870 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1] [2022-01-31 19:33:13,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:33:13,870 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:13,870 INFO L85 PathProgramCache]: Analyzing trace with hash 928638084, now seen corresponding path program 17 times [2022-01-31 19:33:13,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:13,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817367181] [2022-01-31 19:33:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:13,872 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:13,872 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:13,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:13,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:14,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:14,074 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:14,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817367181] [2022-01-31 19:33:14,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [817367181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:14,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:14,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:33:14,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469628041] [2022-01-31 19:33:14,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:14,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:33:14,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:14,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:33:14,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:33:14,075 INFO L87 Difference]: Start difference. First operand 322 states and 341 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:14,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:14,713 INFO L93 Difference]: Finished difference Result 475 states and 511 transitions. [2022-01-31 19:33:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:33:14,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 19:33:14,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:14,716 INFO L225 Difference]: With dead ends: 475 [2022-01-31 19:33:14,716 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 19:33:14,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:33:14,718 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 566 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:14,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 65 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:33:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 19:33:14,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-01-31 19:33:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.053921568627451) internal successors, (215), 204 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 219 transitions. [2022-01-31 19:33:14,851 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 219 transitions. Word has length 190 [2022-01-31 19:33:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:14,851 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 219 transitions. [2022-01-31 19:33:14,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 219 transitions. [2022-01-31 19:33:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 19:33:14,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:14,856 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1] [2022-01-31 19:33:14,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:33:14,856 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash 559516242, now seen corresponding path program 18 times [2022-01-31 19:33:14,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:14,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995286174] [2022-01-31 19:33:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:14,858 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:14,858 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:14,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:14,860 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:34,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:34,015 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:34,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995286174] [2022-01-31 19:33:34,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995286174] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:34,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:34,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 19:33:34,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550704356] [2022-01-31 19:33:34,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:34,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 19:33:34,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:34,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 19:33:34,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=17193, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 19:33:34,019 INFO L87 Difference]: Start difference. First operand 209 states and 219 transitions. Second operand has 135 states, 135 states have (on average 1.511111111111111) internal successors, (204), 133 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:15,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:15,740 INFO L93 Difference]: Finished difference Result 818 states and 879 transitions. [2022-01-31 19:34:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2022-01-31 19:34:15,741 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.511111111111111) internal successors, (204), 133 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2022-01-31 19:34:15,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:15,743 INFO L225 Difference]: With dead ends: 818 [2022-01-31 19:34:15,743 INFO L226 Difference]: Without dead ends: 579 [2022-01-31 19:34:15,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 36 SyntacticMatches, 17 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31211 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=6467, Invalid=92443, Unknown=0, NotChecked=0, Total=98910 [2022-01-31 19:34:15,748 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 595 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 16021 mSolverCounterSat, 5770 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 21791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5770 IncrementalHoareTripleChecker+Valid, 16021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:15,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 436 Invalid, 21791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5770 Valid, 16021 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2022-01-31 19:34:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-31 19:34:16,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 440. [2022-01-31 19:34:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.064367816091954) internal successors, (463), 435 states have internal predecessors, (463), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 467 transitions. [2022-01-31 19:34:16,004 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 467 transitions. Word has length 208 [2022-01-31 19:34:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:16,004 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 467 transitions. [2022-01-31 19:34:16,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.511111111111111) internal successors, (204), 133 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 467 transitions. [2022-01-31 19:34:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 19:34:16,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:16,006 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1] [2022-01-31 19:34:16,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:34:16,006 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:16,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:16,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1226714738, now seen corresponding path program 19 times [2022-01-31 19:34:16,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:16,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499404642] [2022-01-31 19:34:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:16,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:16,008 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:16,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:16,009 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:16,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:16,241 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:16,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499404642] [2022-01-31 19:34:16,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1499404642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:16,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:16,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:34:16,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222113189] [2022-01-31 19:34:16,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:16,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:34:16,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:16,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:34:16,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:34:16,242 INFO L87 Difference]: Start difference. First operand 440 states and 467 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:16,961 INFO L93 Difference]: Finished difference Result 607 states and 650 transitions. [2022-01-31 19:34:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:34:16,962 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2022-01-31 19:34:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:16,963 INFO L225 Difference]: With dead ends: 607 [2022-01-31 19:34:16,963 INFO L226 Difference]: Without dead ends: 251 [2022-01-31 19:34:16,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=746, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:34:16,964 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 966 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 810 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 810 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:16,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 59 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [810 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:34:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-31 19:34:17,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 231. [2022-01-31 19:34:17,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0486725663716814) internal successors, (237), 226 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 241 transitions. [2022-01-31 19:34:17,109 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 241 transitions. Word has length 212 [2022-01-31 19:34:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:17,109 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 241 transitions. [2022-01-31 19:34:17,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 21 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 241 transitions. [2022-01-31 19:34:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 19:34:17,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:17,110 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1] [2022-01-31 19:34:17,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:34:17,110 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:17,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1940699868, now seen corresponding path program 20 times [2022-01-31 19:34:17,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:17,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547703029] [2022-01-31 19:34:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:17,112 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:17,112 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:17,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:17,113 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:41,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:41,576 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:41,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547703029] [2022-01-31 19:34:41,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1547703029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:41,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:41,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 19:34:41,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324681994] [2022-01-31 19:34:41,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:41,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 19:34:41,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:41,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 19:34:41,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1255, Invalid=20501, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 19:34:41,580 INFO L87 Difference]: Start difference. First operand 231 states and 241 transitions. Second operand has 148 states, 148 states have (on average 1.527027027027027) internal successors, (226), 146 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:12,102 INFO L93 Difference]: Finished difference Result 671 states and 711 transitions. [2022-01-31 19:35:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 19:35:12,104 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.527027027027027) internal successors, (226), 146 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2022-01-31 19:35:12,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:12,106 INFO L225 Difference]: With dead ends: 671 [2022-01-31 19:35:12,106 INFO L226 Difference]: Without dead ends: 426 [2022-01-31 19:35:12,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 38 SyntacticMatches, 23 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20038 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=3959, Invalid=52447, Unknown=0, NotChecked=0, Total=56406 [2022-01-31 19:35:12,109 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 386 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 21155 mSolverCounterSat, 3198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 24353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3198 IncrementalHoareTripleChecker+Valid, 21155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:12,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 446 Invalid, 24353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3198 Valid, 21155 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2022-01-31 19:35:12,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-01-31 19:35:12,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 398. [2022-01-31 19:35:12,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 393 states have (on average 1.0508905852417303) internal successors, (413), 393 states have internal predecessors, (413), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 417 transitions. [2022-01-31 19:35:12,339 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 417 transitions. Word has length 230 [2022-01-31 19:35:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:12,340 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 417 transitions. [2022-01-31 19:35:12,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.527027027027027) internal successors, (226), 146 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 417 transitions. [2022-01-31 19:35:12,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 19:35:12,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:12,342 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1] [2022-01-31 19:35:12,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:35:12,342 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:12,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:12,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1971634408, now seen corresponding path program 21 times [2022-01-31 19:35:12,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:12,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820545440] [2022-01-31 19:35:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:12,344 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:12,344 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:12,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:12,345 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:12,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:35:12,604 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:12,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820545440] [2022-01-31 19:35:12,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [820545440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:12,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:12,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:35:12,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699500431] [2022-01-31 19:35:12,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:12,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:35:12,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:35:12,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:35:12,606 INFO L87 Difference]: Start difference. First operand 398 states and 417 transitions. Second operand has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:13,349 INFO L93 Difference]: Finished difference Result 583 states and 619 transitions. [2022-01-31 19:35:13,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:35:13,349 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2022-01-31 19:35:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:13,350 INFO L225 Difference]: With dead ends: 583 [2022-01-31 19:35:13,350 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 19:35:13,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=373, Invalid=887, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:35:13,352 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 824 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:13,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 71 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:35:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 19:35:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-01-31 19:35:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0443548387096775) internal successors, (259), 248 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:13,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 263 transitions. [2022-01-31 19:35:13,508 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 263 transitions. Word has length 234 [2022-01-31 19:35:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:13,508 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 263 transitions. [2022-01-31 19:35:13,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 263 transitions. [2022-01-31 19:35:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-01-31 19:35:13,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:13,509 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1] [2022-01-31 19:35:13,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:35:13,510 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:13,510 INFO L85 PathProgramCache]: Analyzing trace with hash 840878054, now seen corresponding path program 22 times [2022-01-31 19:35:13,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:13,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112190122] [2022-01-31 19:35:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:13,513 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:13,513 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:13,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:13,514 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:46,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:35:46,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:46,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112190122] [2022-01-31 19:35:46,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1112190122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:46,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:46,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2022-01-31 19:35:46,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235838839] [2022-01-31 19:35:46,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:46,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-01-31 19:35:46,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:46,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-01-31 19:35:46,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1257, Invalid=26465, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 19:35:46,279 INFO L87 Difference]: Start difference. First operand 253 states and 263 transitions. Second operand has 167 states, 167 states have (on average 1.4850299401197604) internal successors, (248), 165 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:48,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:48,163 INFO L93 Difference]: Finished difference Result 1076 states and 1138 transitions. [2022-01-31 19:36:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2022-01-31 19:36:48,163 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.4850299401197604) internal successors, (248), 165 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 252 [2022-01-31 19:36:48,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:48,166 INFO L225 Difference]: With dead ends: 1076 [2022-01-31 19:36:48,166 INFO L226 Difference]: Without dead ends: 810 [2022-01-31 19:36:48,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 40 SyntacticMatches, 25 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38945 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=8947, Invalid=116015, Unknown=0, NotChecked=0, Total=124962 [2022-01-31 19:36:48,172 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 441 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 24856 mSolverCounterSat, 6116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 30972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6116 IncrementalHoareTripleChecker+Valid, 24856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:48,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 441 Invalid, 30972 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6116 Valid, 24856 Invalid, 0 Unknown, 0 Unchecked, 20.0s Time] [2022-01-31 19:36:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-01-31 19:36:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 552. [2022-01-31 19:36:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 547 states have (on average 1.0511882998171846) internal successors, (575), 547 states have internal predecessors, (575), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 579 transitions. [2022-01-31 19:36:48,608 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 579 transitions. Word has length 252 [2022-01-31 19:36:48,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:48,608 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 579 transitions. [2022-01-31 19:36:48,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.4850299401197604) internal successors, (248), 165 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 579 transitions. [2022-01-31 19:36:48,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-01-31 19:36:48,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:48,611 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1] [2022-01-31 19:36:48,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:36:48,611 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1994196770, now seen corresponding path program 23 times [2022-01-31 19:36:48,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:48,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899591529] [2022-01-31 19:36:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:48,616 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:48,616 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:48,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:48,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:48,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:48,926 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:48,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899591529] [2022-01-31 19:36:48,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1899591529] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:48,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:48,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:36:48,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437781486] [2022-01-31 19:36:48,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:48,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:36:48,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:48,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:36:48,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:36:48,928 INFO L87 Difference]: Start difference. First operand 552 states and 579 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:49,716 INFO L93 Difference]: Finished difference Result 751 states and 794 transitions. [2022-01-31 19:36:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:36:49,716 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2022-01-31 19:36:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:49,717 INFO L225 Difference]: With dead ends: 751 [2022-01-31 19:36:49,717 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 19:36:49,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:36:49,719 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 638 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:49,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 67 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:36:49,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 19:36:49,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-01-31 19:36:49,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0407407407407407) internal successors, (281), 270 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 285 transitions. [2022-01-31 19:36:49,927 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 285 transitions. Word has length 256 [2022-01-31 19:36:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:49,927 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 285 transitions. [2022-01-31 19:36:49,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 285 transitions. [2022-01-31 19:36:49,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-31 19:36:49,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:49,929 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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, 1, 1, 1] [2022-01-31 19:36:49,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:36:49,929 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:49,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:49,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1416146576, now seen corresponding path program 24 times [2022-01-31 19:36:49,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:49,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320200314] [2022-01-31 19:36:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:49,931 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:49,932 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:49,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:49,933 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:21,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:21,390 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:21,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320200314] [2022-01-31 19:37:21,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [320200314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:21,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:21,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-01-31 19:37:21,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675329381] [2022-01-31 19:37:21,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:21,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-01-31 19:37:21,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:21,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-01-31 19:37:21,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1704, Invalid=26352, Unknown=0, NotChecked=0, Total=28056 [2022-01-31 19:37:21,394 INFO L87 Difference]: Start difference. First operand 275 states and 285 transitions. Second operand has 168 states, 168 states have (on average 1.6071428571428572) internal successors, (270), 166 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:57,806 INFO L93 Difference]: Finished difference Result 525 states and 553 transitions. [2022-01-31 19:37:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 19:37:57,806 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 1.6071428571428572) internal successors, (270), 166 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2022-01-31 19:37:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:57,808 INFO L225 Difference]: With dead ends: 525 [2022-01-31 19:37:57,808 INFO L226 Difference]: Without dead ends: 520 [2022-01-31 19:37:57,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 30 SyntacticMatches, 58 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30466 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=6524, Invalid=73848, Unknown=0, NotChecked=0, Total=80372 [2022-01-31 19:37:57,811 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 403 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 23932 mSolverCounterSat, 4790 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 28722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4790 IncrementalHoareTripleChecker+Valid, 23932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:57,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 588 Invalid, 28722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4790 Valid, 23932 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2022-01-31 19:37:57,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-01-31 19:37:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 280. [2022-01-31 19:37:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.0436363636363637) internal successors, (287), 275 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 291 transitions. [2022-01-31 19:37:58,067 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 291 transitions. Word has length 274 [2022-01-31 19:37:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:58,067 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 291 transitions. [2022-01-31 19:37:58,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 1.6071428571428572) internal successors, (270), 166 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 291 transitions. [2022-01-31 19:37:58,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-01-31 19:37:58,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:58,069 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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, 1, 1, 1] [2022-01-31 19:37:58,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:37:58,069 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:58,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:58,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1571562510, now seen corresponding path program 25 times [2022-01-31 19:37:58,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:58,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617691622] [2022-01-31 19:37:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:58,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:58,072 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:58,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:58,073 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:58,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:58,421 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:58,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617691622] [2022-01-31 19:37:58,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [617691622] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:58,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:58,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:37:58,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757914193] [2022-01-31 19:37:58,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:58,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:37:58,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:58,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:37:58,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:37:58,422 INFO L87 Difference]: Start difference. First operand 280 states and 291 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:59,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:59,919 INFO L93 Difference]: Finished difference Result 751 states and 782 transitions. [2022-01-31 19:37:59,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 19:37:59,920 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 276 [2022-01-31 19:37:59,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:59,921 INFO L225 Difference]: With dead ends: 751 [2022-01-31 19:37:59,921 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 19:37:59,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=1357, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:37:59,923 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 178 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:59,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 151 Invalid, 2374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:37:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 19:38:00,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 282. [2022-01-31 19:38:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 1.0433212996389891) internal successors, (289), 277 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 293 transitions. [2022-01-31 19:38:00,172 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 293 transitions. Word has length 276 [2022-01-31 19:38:00,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:00,172 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 293 transitions. [2022-01-31 19:38:00,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 293 transitions. [2022-01-31 19:38:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 19:38:00,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:00,174 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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, 1, 1, 1] [2022-01-31 19:38:00,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:38:00,174 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash 551127468, now seen corresponding path program 26 times [2022-01-31 19:38:00,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:00,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132419794] [2022-01-31 19:38:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:00,176 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:00,177 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:00,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:00,178 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:00,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:00,540 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:00,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132419794] [2022-01-31 19:38:00,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1132419794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:00,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:00,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:38:00,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80341151] [2022-01-31 19:38:00,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:00,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:38:00,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:00,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:38:00,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:38:00,542 INFO L87 Difference]: Start difference. First operand 282 states and 293 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:01,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:01,473 INFO L93 Difference]: Finished difference Result 523 states and 552 transitions. [2022-01-31 19:38:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:38:01,473 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2022-01-31 19:38:01,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:01,474 INFO L225 Difference]: With dead ends: 523 [2022-01-31 19:38:01,474 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 19:38:01,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:38:01,475 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 660 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:01,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 71 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:38:01,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 19:38:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2022-01-31 19:38:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.0376712328767124) internal successors, (303), 292 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 307 transitions. [2022-01-31 19:38:01,754 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 307 transitions. Word has length 278 [2022-01-31 19:38:01,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:01,754 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 307 transitions. [2022-01-31 19:38:01,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:01,754 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 307 transitions. [2022-01-31 19:38:01,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-01-31 19:38:01,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:01,755 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 1, 1, 1] [2022-01-31 19:38:01,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:38:01,755 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1367734138, now seen corresponding path program 27 times [2022-01-31 19:38:01,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:01,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446341065] [2022-01-31 19:38:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:01,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:01,757 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:01,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:01,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:55,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:55,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:55,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446341065] [2022-01-31 19:38:55,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1446341065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:55,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:55,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [189] imperfect sequences [] total 189 [2022-01-31 19:38:55,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181463823] [2022-01-31 19:38:55,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:55,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-01-31 19:38:55,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:55,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-01-31 19:38:55,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2289, Invalid=33243, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 19:38:55,481 INFO L87 Difference]: Start difference. First operand 297 states and 307 transitions. Second operand has 189 states, 189 states have (on average 1.5449735449735449) internal successors, (292), 187 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:32,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:32,125 INFO L93 Difference]: Finished difference Result 548 states and 567 transitions. [2022-01-31 19:39:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 19:39:32,125 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.5449735449735449) internal successors, (292), 187 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 296 [2022-01-31 19:39:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:32,126 INFO L225 Difference]: With dead ends: 548 [2022-01-31 19:39:32,126 INFO L226 Difference]: Without dead ends: 543 [2022-01-31 19:39:32,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 41 SyntacticMatches, 44 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13689 ImplicationChecksByTransitivity, 46.9s TimeCoverageRelationStatistics Valid=3935, Invalid=56335, Unknown=0, NotChecked=0, Total=60270 [2022-01-31 19:39:32,133 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 32829 mSolverCounterSat, 1280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 34109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1280 IncrementalHoareTripleChecker+Valid, 32829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:32,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 625 Invalid, 34109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1280 Valid, 32829 Invalid, 0 Unknown, 0 Unchecked, 22.7s Time] [2022-01-31 19:39:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-31 19:39:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 510. [2022-01-31 19:39:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 505 states have (on average 1.0396039603960396) internal successors, (525), 505 states have internal predecessors, (525), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 529 transitions. [2022-01-31 19:39:32,720 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 529 transitions. Word has length 296 [2022-01-31 19:39:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:32,720 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 529 transitions. [2022-01-31 19:39:32,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.5449735449735449) internal successors, (292), 187 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 529 transitions. [2022-01-31 19:39:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-31 19:39:32,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:32,722 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 1, 1, 1] [2022-01-31 19:39:32,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:39:32,722 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:32,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1429778840, now seen corresponding path program 28 times [2022-01-31 19:39:32,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:32,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571019240] [2022-01-31 19:39:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:32,725 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:32,725 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:32,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:32,726 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:33,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:33,083 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:33,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571019240] [2022-01-31 19:39:33,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1571019240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:33,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:33,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:39:33,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076456870] [2022-01-31 19:39:33,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:33,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:39:33,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:33,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:39:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:39:33,084 INFO L87 Difference]: Start difference. First operand 510 states and 529 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:34,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:34,878 INFO L93 Difference]: Finished difference Result 1014 states and 1052 transitions. [2022-01-31 19:39:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 19:39:34,878 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2022-01-31 19:39:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:34,880 INFO L225 Difference]: With dead ends: 1014 [2022-01-31 19:39:34,880 INFO L226 Difference]: Without dead ends: 513 [2022-01-31 19:39:34,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=1560, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:39:34,882 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 229 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:34,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 143 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:39:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-31 19:39:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 512. [2022-01-31 19:39:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 507 states have (on average 1.039447731755424) internal successors, (527), 507 states have internal predecessors, (527), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 531 transitions. [2022-01-31 19:39:35,398 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 531 transitions. Word has length 298 [2022-01-31 19:39:35,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:35,398 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 531 transitions. [2022-01-31 19:39:35,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:35,398 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 531 transitions. [2022-01-31 19:39:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-01-31 19:39:35,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:35,400 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 1, 1, 1] [2022-01-31 19:39:35,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:39:35,400 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash 616098998, now seen corresponding path program 29 times [2022-01-31 19:39:35,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:35,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896652775] [2022-01-31 19:39:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:35,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:35,402 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:35,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:35,404 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:35,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:35,768 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:35,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896652775] [2022-01-31 19:39:35,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [896652775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:35,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:35,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:39:35,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939260710] [2022-01-31 19:39:35,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:35,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:39:35,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:39:35,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:39:35,769 INFO L87 Difference]: Start difference. First operand 512 states and 531 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:36,899 INFO L93 Difference]: Finished difference Result 745 states and 781 transitions. [2022-01-31 19:39:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 19:39:36,899 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 300 [2022-01-31 19:39:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:36,900 INFO L225 Difference]: With dead ends: 745 [2022-01-31 19:39:36,900 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 19:39:36,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=598, Invalid=1382, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:39:36,902 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1237 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 1075 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1075 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:36,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 67 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1075 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:39:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 19:39:37,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2022-01-31 19:39:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.035031847133758) internal successors, (325), 314 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 329 transitions. [2022-01-31 19:39:37,211 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 329 transitions. Word has length 300 [2022-01-31 19:39:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:37,211 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 329 transitions. [2022-01-31 19:39:37,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 329 transitions. [2022-01-31 19:39:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-31 19:39:37,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:37,212 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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, 1, 1, 1] [2022-01-31 19:39:37,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:39:37,213 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:37,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:37,213 INFO L85 PathProgramCache]: Analyzing trace with hash 568482308, now seen corresponding path program 30 times [2022-01-31 19:39:37,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:37,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563776943] [2022-01-31 19:39:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:37,215 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:37,215 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:37,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:37,216 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:18,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:18,955 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:18,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563776943] [2022-01-31 19:40:18,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563776943] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:18,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:18,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [204] imperfect sequences [] total 204 [2022-01-31 19:40:18,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401813637] [2022-01-31 19:40:18,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:18,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2022-01-31 19:40:18,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:18,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2022-01-31 19:40:18,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2424, Invalid=38988, Unknown=0, NotChecked=0, Total=41412 [2022-01-31 19:40:18,959 INFO L87 Difference]: Start difference. First operand 319 states and 329 transitions. Second operand has 204 states, 204 states have (on average 1.5392156862745099) internal successors, (314), 202 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:08,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:08,549 INFO L93 Difference]: Finished difference Result 605 states and 633 transitions. [2022-01-31 19:41:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 19:41:08,549 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 1.5392156862745099) internal successors, (314), 202 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 318 [2022-01-31 19:41:08,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:08,551 INFO L225 Difference]: With dead ends: 605 [2022-01-31 19:41:08,551 INFO L226 Difference]: Without dead ends: 600 [2022-01-31 19:41:08,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 39 SyntacticMatches, 57 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37552 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=8371, Invalid=96281, Unknown=0, NotChecked=0, Total=104652 [2022-01-31 19:41:08,554 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 383 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 32207 mSolverCounterSat, 6621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 38828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6621 IncrementalHoareTripleChecker+Valid, 32207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:08,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 675 Invalid, 38828 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6621 Valid, 32207 Invalid, 0 Unknown, 0 Unchecked, 23.0s Time] [2022-01-31 19:41:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-31 19:41:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 324. [2022-01-31 19:41:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 319 states have (on average 1.0376175548589341) internal successors, (331), 319 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 335 transitions. [2022-01-31 19:41:08,962 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 335 transitions. Word has length 318 [2022-01-31 19:41:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:08,962 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 335 transitions. [2022-01-31 19:41:08,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 1.5392156862745099) internal successors, (314), 202 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 335 transitions. [2022-01-31 19:41:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-31 19:41:08,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:08,964 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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, 1, 1, 1] [2022-01-31 19:41:08,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:41:08,964 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1834440610, now seen corresponding path program 31 times [2022-01-31 19:41:08,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:08,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088694250] [2022-01-31 19:41:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:08,967 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:08,967 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:08,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:08,968 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:09,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:09,367 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088694250] [2022-01-31 19:41:09,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1088694250] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:09,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:09,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:41:09,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744837581] [2022-01-31 19:41:09,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:09,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:41:09,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:09,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:41:09,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:41:09,369 INFO L87 Difference]: Start difference. First operand 324 states and 335 transitions. Second operand has 32 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:11,167 INFO L93 Difference]: Finished difference Result 871 states and 902 transitions. [2022-01-31 19:41:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:41:11,167 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 320 [2022-01-31 19:41:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:11,168 INFO L225 Difference]: With dead ends: 871 [2022-01-31 19:41:11,168 INFO L226 Difference]: Without dead ends: 327 [2022-01-31 19:41:11,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:41:11,170 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 225 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:11,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 149 Invalid, 2425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:41:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-31 19:41:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2022-01-31 19:41:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 321 states have (on average 1.0373831775700935) internal successors, (333), 321 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 337 transitions. [2022-01-31 19:41:11,554 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 337 transitions. Word has length 320 [2022-01-31 19:41:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:11,555 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 337 transitions. [2022-01-31 19:41:11,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 337 transitions. [2022-01-31 19:41:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-01-31 19:41:11,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:11,556 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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, 1, 1, 1] [2022-01-31 19:41:11,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:41:11,556 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:11,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1124513728, now seen corresponding path program 32 times [2022-01-31 19:41:11,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:11,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872171667] [2022-01-31 19:41:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:11,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:11,559 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:11,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:11,560 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:11,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:11,920 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:11,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872171667] [2022-01-31 19:41:11,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [872171667] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:11,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:11,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:41:11,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598714104] [2022-01-31 19:41:11,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:11,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:41:11,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:11,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:41:11,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:41:11,921 INFO L87 Difference]: Start difference. First operand 326 states and 337 transitions. Second operand has 32 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:13,205 INFO L93 Difference]: Finished difference Result 603 states and 632 transitions. [2022-01-31 19:41:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 19:41:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 322 [2022-01-31 19:41:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:13,206 INFO L225 Difference]: With dead ends: 603 [2022-01-31 19:41:13,207 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 19:41:13,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=685, Invalid=1571, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:41:13,207 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1199 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 1069 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1069 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:13,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1199 Valid, 73 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1069 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:41:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 19:41:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2022-01-31 19:41:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 336 states have (on average 1.0327380952380953) internal successors, (347), 336 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) [2022-01-31 19:41:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 351 transitions. [2022-01-31 19:41:13,629 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 351 transitions. Word has length 322 [2022-01-31 19:41:13,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:13,629 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 351 transitions. [2022-01-31 19:41:13,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:13,629 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 351 transitions. [2022-01-31 19:41:13,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-01-31 19:41:13,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:13,630 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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, 1, 1, 1] [2022-01-31 19:41:13,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:41:13,631 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:13,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:13,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1859380978, now seen corresponding path program 33 times [2022-01-31 19:41:13,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:13,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62218482] [2022-01-31 19:41:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:13,633 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:13,633 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:13,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:13,634 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:08,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:08,502 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:08,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62218482] [2022-01-31 19:42:08,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [62218482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:08,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:08,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [221] imperfect sequences [] total 221 [2022-01-31 19:42:08,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307222772] [2022-01-31 19:42:08,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:08,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 221 states [2022-01-31 19:42:08,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:08,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2022-01-31 19:42:08,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2785, Invalid=45835, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 19:42:08,507 INFO L87 Difference]: Start difference. First operand 341 states and 351 transitions. Second operand has 221 states, 221 states have (on average 1.5203619909502262) internal successors, (336), 219 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:10,699 INFO L93 Difference]: Finished difference Result 645 states and 673 transitions. [2022-01-31 19:43:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-01-31 19:43:10,699 INFO L78 Accepts]: Start accepts. Automaton has has 221 states, 221 states have (on average 1.5203619909502262) internal successors, (336), 219 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 340 [2022-01-31 19:43:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:10,701 INFO L225 Difference]: With dead ends: 645 [2022-01-31 19:43:10,701 INFO L226 Difference]: Without dead ends: 640 [2022-01-31 19:43:10,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 44 SyntacticMatches, 56 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51001 ImplicationChecksByTransitivity, 63.5s TimeCoverageRelationStatistics Valid=10844, Invalid=127912, Unknown=0, NotChecked=0, Total=138756 [2022-01-31 19:43:10,705 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 311 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 35321 mSolverCounterSat, 6139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 41460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6139 IncrementalHoareTripleChecker+Valid, 35321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:10,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 638 Invalid, 41460 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6139 Valid, 35321 Invalid, 0 Unknown, 0 Unchecked, 26.5s Time] [2022-01-31 19:43:10,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-01-31 19:43:11,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 346. [2022-01-31 19:43:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 341 states have (on average 1.035190615835777) internal successors, (353), 341 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 357 transitions. [2022-01-31 19:43:11,224 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 357 transitions. Word has length 340 [2022-01-31 19:43:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:11,224 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 357 transitions. [2022-01-31 19:43:11,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 221 states, 221 states have (on average 1.5203619909502262) internal successors, (336), 219 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 357 transitions. [2022-01-31 19:43:11,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-31 19:43:11,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:11,226 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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, 1, 1, 1] [2022-01-31 19:43:11,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 19:43:11,226 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:11,226 INFO L85 PathProgramCache]: Analyzing trace with hash 825064492, now seen corresponding path program 34 times [2022-01-31 19:43:11,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:11,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563903257] [2022-01-31 19:43:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:11,228 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:11,228 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:11,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:11,230 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:11,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:11,626 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:11,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563903257] [2022-01-31 19:43:11,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [563903257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:11,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:11,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:43:11,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540016046] [2022-01-31 19:43:11,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:11,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:43:11,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:11,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:43:11,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:43:11,628 INFO L87 Difference]: Start difference. First operand 346 states and 357 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:13,873 INFO L93 Difference]: Finished difference Result 931 states and 962 transitions. [2022-01-31 19:43:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 19:43:13,874 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 342 [2022-01-31 19:43:13,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:13,875 INFO L225 Difference]: With dead ends: 931 [2022-01-31 19:43:13,875 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 19:43:13,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=542, Invalid=2008, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:43:13,877 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 217 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2844 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 3056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:13,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 161 Invalid, 3056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2844 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:43:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 19:43:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 348. [2022-01-31 19:43:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 343 states have (on average 1.0349854227405249) internal successors, (355), 343 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 359 transitions. [2022-01-31 19:43:14,424 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 359 transitions. Word has length 342 [2022-01-31 19:43:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:14,424 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 359 transitions. [2022-01-31 19:43:14,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 359 transitions. [2022-01-31 19:43:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-01-31 19:43:14,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:14,425 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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, 1, 1, 1] [2022-01-31 19:43:14,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:43:14,425 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:14,426 INFO L85 PathProgramCache]: Analyzing trace with hash -329776566, now seen corresponding path program 35 times [2022-01-31 19:43:14,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:14,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410940894] [2022-01-31 19:43:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:14,428 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:14,428 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:14,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:14,429 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:14,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:14,814 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:14,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410940894] [2022-01-31 19:43:14,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [410940894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:14,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:14,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:43:14,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400872422] [2022-01-31 19:43:14,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:14,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:43:14,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:14,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:43:14,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:43:14,816 INFO L87 Difference]: Start difference. First operand 348 states and 359 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:16,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:16,316 INFO L93 Difference]: Finished difference Result 643 states and 672 transitions. [2022-01-31 19:43:16,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:43:16,316 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 344 [2022-01-31 19:43:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:16,317 INFO L225 Difference]: With dead ends: 643 [2022-01-31 19:43:16,317 INFO L226 Difference]: Without dead ends: 363 [2022-01-31 19:43:16,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=778, Invalid=1772, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:43:16,318 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1549 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 1355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 2179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1355 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:16,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 75 Invalid, 2179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1355 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:43:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-31 19:43:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2022-01-31 19:43:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 358 states have (on average 1.0307262569832403) internal successors, (369), 358 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 373 transitions. [2022-01-31 19:43:16,841 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 373 transitions. Word has length 344 [2022-01-31 19:43:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:16,841 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 373 transitions. [2022-01-31 19:43:16,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:16,841 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 373 transitions. [2022-01-31 19:43:16,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-01-31 19:43:16,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:16,842 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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, 1, 1, 1] [2022-01-31 19:43:16,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:43:16,842 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:16,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash -194325352, now seen corresponding path program 36 times [2022-01-31 19:43:16,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:16,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661850500] [2022-01-31 19:43:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:16,844 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:16,844 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:16,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:16,845 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat