/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_sum_const4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:33:34,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:33:34,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:33:34,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:33:34,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:33:34,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:33:35,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:33:35,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:33:35,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:33:35,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:33:35,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:33:35,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:33:35,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:33:35,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:33:35,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:33:35,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:33:35,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:33:35,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:33:35,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:33:35,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:33:35,054 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 19:33:35,059 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:33:35,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:33:35,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:33:35,060 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:33:35,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:33:35,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:33:35,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:33:35,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:33:35,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:33:35,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:33:35,061 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:33:35,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:33:35,061 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:33:35,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:33:35,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:33:35,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:33:35,061 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:33:35,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:33:35,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:33:35,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:33:35,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:33:35,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:33:35,062 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:33:35,062 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:33:35,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:33:35,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:33:35,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:33:35,219 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:33:35,220 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:33:35,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2022-01-31 19:33:35,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3bb5bd1a/682a6ffe69dc42e6a5c77513ba26dd20/FLAG2059a204a [2022-01-31 19:33:35,617 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:33:35,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2022-01-31 19:33:35,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3bb5bd1a/682a6ffe69dc42e6a5c77513ba26dd20/FLAG2059a204a [2022-01-31 19:33:35,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3bb5bd1a/682a6ffe69dc42e6a5c77513ba26dd20 [2022-01-31 19:33:35,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:33:35,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:33:35,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:33:35,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:33:35,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:33:35,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:33:35" (1/1) ... [2022-01-31 19:33:35,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e080cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:35, skipping insertion in model container [2022-01-31 19:33:35,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:33:35" (1/1) ... [2022-01-31 19:33:35,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:33:35,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:33:35,773 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_sum_const4.c[406,419] [2022-01-31 19:33:35,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:33:35,798 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:33:35,805 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_sum_const4.c[406,419] [2022-01-31 19:33:35,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:33:35,819 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:33:35,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:35 WrapperNode [2022-01-31 19:33:35,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:33:35,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:33:35,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:33:35,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:33:35,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:35" (1/1) ... [2022-01-31 19:33:35,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:35" (1/1) ... [2022-01-31 19:33:35,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:35" (1/1) ... [2022-01-31 19:33:35,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:35" (1/1) ... [2022-01-31 19:33:35,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:35" (1/1) ... [2022-01-31 19:33:35,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:35" (1/1) ... [2022-01-31 19:33:35,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:35" (1/1) ... [2022-01-31 19:33:35,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:33:35,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:33:35,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:33:35,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:33:35,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:35" (1/1) ... [2022-01-31 19:33:35,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:33:35,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:33:35,903 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 19:33:35,934 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 19:33:35,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:33:35,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:33:35,940 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:33:35,940 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 19:33:35,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:33:35,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:33:35,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:33:35,941 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:33:35,942 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:33:35,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:33:35,942 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 19:33:35,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:33:35,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-01-31 19:33:35,943 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 19:33:35,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:33:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 19:33:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:33:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:33:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:33:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:33:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:33:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:33:36,003 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:33:36,005 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:33:36,166 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:33:36,172 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:33:36,175 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-01-31 19:33:36,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:33:36 BoogieIcfgContainer [2022-01-31 19:33:36,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:33:36,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:33:36,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:33:36,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:33:36,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:33:35" (1/3) ... [2022-01-31 19:33:36,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8e1455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:33:36, skipping insertion in model container [2022-01-31 19:33:36,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:33:35" (2/3) ... [2022-01-31 19:33:36,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8e1455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:33:36, skipping insertion in model container [2022-01-31 19:33:36,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:33:36" (3/3) ... [2022-01-31 19:33:36,192 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2022-01-31 19:33:36,195 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:33:36,195 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:33:36,223 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:33:36,227 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 19:33:36,227 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:33:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 39 states have internal predecessors, (58), 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 19:33:36,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 19:33:36,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:36,244 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] [2022-01-31 19:33:36,244 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:36,248 INFO L85 PathProgramCache]: Analyzing trace with hash -906171067, now seen corresponding path program 1 times [2022-01-31 19:33:36,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:36,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046199679] [2022-01-31 19:33:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:36,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:36,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:36,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:36,444 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 19:33:36,445 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:36,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046199679] [2022-01-31 19:33:36,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046199679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:36,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:36,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:33:36,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954641103] [2022-01-31 19:33:36,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:36,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:33:36,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:36,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:33:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:33:36,478 INFO L87 Difference]: Start difference. First operand has 45 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 39 states have internal predecessors, (58), 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 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:36,609 INFO L93 Difference]: Finished difference Result 83 states and 121 transitions. [2022-01-31 19:33:36,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 19:33:36,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 19:33:36,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:36,615 INFO L225 Difference]: With dead ends: 83 [2022-01-31 19:33:36,616 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 19:33:36,621 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 19:33:36,624 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:36,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 65 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:33:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 19:33:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-01-31 19:33:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:36,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-01-31 19:33:36,652 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 28 [2022-01-31 19:33:36,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:36,653 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-01-31 19:33:36,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:36,653 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-01-31 19:33:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 19:33:36,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:36,655 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] [2022-01-31 19:33:36,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:33:36,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:36,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:36,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1522970351, now seen corresponding path program 1 times [2022-01-31 19:33:36,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:36,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400459521] [2022-01-31 19:33:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:36,677 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:36,677 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:36,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:36,681 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:36,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:36,758 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:36,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400459521] [2022-01-31 19:33:36,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [400459521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:36,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:36,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:33:36,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613596278] [2022-01-31 19:33:36,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:36,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:33:36,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:36,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:33:36,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:33:36,760 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:36,886 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2022-01-31 19:33:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:33:36,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 19:33:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:36,887 INFO L225 Difference]: With dead ends: 82 [2022-01-31 19:33:36,887 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 19:33:36,888 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 19:33:36,889 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:36,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 25 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:33:36,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 19:33:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2022-01-31 19:33:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 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 19:33:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-01-31 19:33:36,897 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 30 [2022-01-31 19:33:36,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:36,897 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-01-31 19:33:36,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-01-31 19:33:36,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 19:33:36,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:36,898 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] [2022-01-31 19:33:36,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:33:36,899 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:36,899 INFO L85 PathProgramCache]: Analyzing trace with hash -135660287, now seen corresponding path program 1 times [2022-01-31 19:33:36,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:36,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274475080] [2022-01-31 19:33:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:36,905 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:36,905 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:36,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:36,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:36,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:36,994 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 19:33:36,994 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:36,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274475080] [2022-01-31 19:33:36,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1274475080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:36,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:36,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:33:36,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328030970] [2022-01-31 19:33:36,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:36,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:33:36,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:36,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:33:36,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:33:36,996 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:37,085 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2022-01-31 19:33:37,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:33:37,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 19:33:37,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:37,086 INFO L225 Difference]: With dead ends: 86 [2022-01-31 19:33:37,086 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 19:33:37,088 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 19:33:37,093 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:37,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 48 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:33:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 19:33:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-01-31 19:33:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 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 19:33:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-01-31 19:33:37,112 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 46 [2022-01-31 19:33:37,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:37,112 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-01-31 19:33:37,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:37,112 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-01-31 19:33:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 19:33:37,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:37,113 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] [2022-01-31 19:33:37,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:33:37,113 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:37,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:37,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1655628321, now seen corresponding path program 2 times [2022-01-31 19:33:37,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:37,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099746313] [2022-01-31 19:33:37,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:37,116 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:37,116 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:37,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:37,117 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:37,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:37,203 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:37,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099746313] [2022-01-31 19:33:37,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2099746313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:37,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:37,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:33:37,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566727366] [2022-01-31 19:33:37,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:37,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:33:37,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:37,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:33:37,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:33:37,205 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:37,322 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2022-01-31 19:33:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:33:37,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 19:33:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:37,323 INFO L225 Difference]: With dead ends: 98 [2022-01-31 19:33:37,323 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 19:33:37,323 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 19:33:37,324 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:37,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 29 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:33:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 19:33:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-01-31 19:33:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 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 19:33:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-01-31 19:33:37,332 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 48 [2022-01-31 19:33:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:37,332 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-01-31 19:33:37,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:37,332 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-01-31 19:33:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 19:33:37,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:37,333 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:33:37,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:33:37,334 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:37,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:37,334 INFO L85 PathProgramCache]: Analyzing trace with hash 118042063, now seen corresponding path program 3 times [2022-01-31 19:33:37,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:37,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64037496] [2022-01-31 19:33:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:37,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:37,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:37,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:37,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:38,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:38,567 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 19:33:38,567 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:38,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64037496] [2022-01-31 19:33:38,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [64037496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:38,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:38,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:33:38,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333465859] [2022-01-31 19:33:38,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:38,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:33:38,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:38,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:33:38,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:33:38,571 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 18 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 19:33:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:38,962 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2022-01-31 19:33:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:33:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 19:33:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:38,966 INFO L225 Difference]: With dead ends: 115 [2022-01-31 19:33:38,966 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 19:33:38,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:33:38,967 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:38,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 163 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 19:33:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2022-01-31 19:33:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 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 19:33:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2022-01-31 19:33:38,984 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 64 [2022-01-31 19:33:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:38,984 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2022-01-31 19:33:38,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 18 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 19:33:38,984 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2022-01-31 19:33:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 19:33:38,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:38,985 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-31 19:33:38,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:33:38,985 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:38,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:38,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1728789843, now seen corresponding path program 4 times [2022-01-31 19:33:38,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:38,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219707150] [2022-01-31 19:33:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:38,987 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:38,987 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:38,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:38,988 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:39,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:39,069 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 19:33:39,070 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:39,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219707150] [2022-01-31 19:33:39,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [219707150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:39,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:39,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:33:39,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28728829] [2022-01-31 19:33:39,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:39,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:33:39,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:39,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:33:39,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:33:39,071 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:39,309 INFO L93 Difference]: Finished difference Result 230 states and 266 transitions. [2022-01-31 19:33:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 19:33:39,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 19:33:39,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:39,310 INFO L225 Difference]: With dead ends: 230 [2022-01-31 19:33:39,310 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 19:33:39,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:33:39,312 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 127 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:39,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 45 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:33:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 19:33:39,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 117. [2022-01-31 19:33:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.1339285714285714) internal successors, (127), 112 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 19:33:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2022-01-31 19:33:39,323 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 66 [2022-01-31 19:33:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:39,323 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2022-01-31 19:33:39,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2022-01-31 19:33:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 19:33:39,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:39,324 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-01-31 19:33:39,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:33:39,324 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash 298551499, now seen corresponding path program 5 times [2022-01-31 19:33:39,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:39,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994606674] [2022-01-31 19:33:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:39,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:39,326 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:39,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:39,327 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:39,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:39,384 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 19:33:39,384 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:39,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994606674] [2022-01-31 19:33:39,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1994606674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:39,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:39,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:33:39,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081999184] [2022-01-31 19:33:39,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:39,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:33:39,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:39,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:33:39,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:33:39,386 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:39,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:39,589 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2022-01-31 19:33:39,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:33:39,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 19:33:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:39,609 INFO L225 Difference]: With dead ends: 124 [2022-01-31 19:33:39,609 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 19:33:39,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:33:39,610 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 149 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:39,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 41 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:33:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 19:33:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-01-31 19:33:39,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 78 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-01-31 19:33:39,620 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 68 [2022-01-31 19:33:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:39,620 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-01-31 19:33:39,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-01-31 19:33:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 19:33:39,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:39,621 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:33:39,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:33:39,621 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:39,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:39,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1984399133, now seen corresponding path program 6 times [2022-01-31 19:33:39,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:39,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061111045] [2022-01-31 19:33:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:39,623 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:39,623 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:39,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:39,624 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:43,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:43,049 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 19:33:43,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061111045] [2022-01-31 19:33:43,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2061111045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:43,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:43,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 19:33:43,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488091114] [2022-01-31 19:33:43,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:43,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 19:33:43,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 19:33:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2859, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:33:43,051 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 54 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:46,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:46,564 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2022-01-31 19:33:46,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:33:46,564 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 54 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 19:33:46,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:46,567 INFO L225 Difference]: With dead ends: 154 [2022-01-31 19:33:46,567 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 19:33:46,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=595, Invalid=7777, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 19:33:46,569 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:46,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 189 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 19:33:46,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 19:33:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 136. [2022-01-31 19:33:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.1221374045801527) internal successors, (147), 131 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 19:33:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 151 transitions. [2022-01-31 19:33:46,599 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 151 transitions. Word has length 82 [2022-01-31 19:33:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:46,599 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 151 transitions. [2022-01-31 19:33:46,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 54 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 151 transitions. [2022-01-31 19:33:46,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 19:33:46,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:46,603 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2022-01-31 19:33:46,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:33:46,603 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1443999867, now seen corresponding path program 7 times [2022-01-31 19:33:46,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:46,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52996333] [2022-01-31 19:33:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:46,605 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:46,605 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:46,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:46,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:46,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:46,688 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 19:33:46,688 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:46,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52996333] [2022-01-31 19:33:46,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [52996333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:46,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:46,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:33:46,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587318372] [2022-01-31 19:33:46,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:46,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:33:46,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:46,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:33:46,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:33:46,690 INFO L87 Difference]: Start difference. First operand 136 states and 151 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:46,975 INFO L93 Difference]: Finished difference Result 290 states and 326 transitions. [2022-01-31 19:33:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:33:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-01-31 19:33:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:46,976 INFO L225 Difference]: With dead ends: 290 [2022-01-31 19:33:46,976 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 19:33:46,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:33:46,977 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 200 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:46,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 43 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:33:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 19:33:46,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 147. [2022-01-31 19:33:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.1056338028169015) internal successors, (157), 142 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 19:33:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 161 transitions. [2022-01-31 19:33:46,989 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 161 transitions. Word has length 84 [2022-01-31 19:33:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:46,989 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 161 transitions. [2022-01-31 19:33:46,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 161 transitions. [2022-01-31 19:33:46,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 19:33:46,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:46,990 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-01-31 19:33:46,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:33:46,991 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:46,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:46,991 INFO L85 PathProgramCache]: Analyzing trace with hash -694383847, now seen corresponding path program 8 times [2022-01-31 19:33:46,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:46,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085058178] [2022-01-31 19:33:46,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:46,992 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:46,992 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:46,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:46,993 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:47,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:47,057 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 19:33:47,057 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:47,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085058178] [2022-01-31 19:33:47,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2085058178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:47,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:47,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:33:47,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117415117] [2022-01-31 19:33:47,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:47,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:33:47,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:47,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:33:47,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:33:47,058 INFO L87 Difference]: Start difference. First operand 147 states and 161 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:47,311 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2022-01-31 19:33:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:33:47,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 19:33:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:47,312 INFO L225 Difference]: With dead ends: 154 [2022-01-31 19:33:47,312 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 19:33:47,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:33:47,313 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:47,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 51 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:33:47,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 19:33:47,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-01-31 19:33:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.09375) internal successors, (105), 96 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 19:33:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2022-01-31 19:33:47,325 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 86 [2022-01-31 19:33:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:47,326 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2022-01-31 19:33:47,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2022-01-31 19:33:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 19:33:47,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:47,332 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:33:47,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:33:47,332 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash 416016619, now seen corresponding path program 9 times [2022-01-31 19:33:47,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:47,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636872172] [2022-01-31 19:33:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:47,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:47,335 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:47,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:47,336 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:51,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:51,945 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 19:33:51,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:51,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636872172] [2022-01-31 19:33:51,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [636872172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:51,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:51,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 19:33:51,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44039372] [2022-01-31 19:33:51,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:51,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 19:33:51,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:51,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 19:33:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=4344, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:33:51,948 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 69 states, 69 states have (on average 1.391304347826087) internal successors, (96), 67 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 19:33:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:59,419 INFO L93 Difference]: Finished difference Result 306 states and 338 transitions. [2022-01-31 19:33:59,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 19:33:59,420 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.391304347826087) internal successors, (96), 67 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 100 [2022-01-31 19:33:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:59,420 INFO L225 Difference]: With dead ends: 306 [2022-01-31 19:33:59,421 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 19:33:59,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5528 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1340, Invalid=16482, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 19:33:59,435 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 167 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 5683 mSolverCounterSat, 1001 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 6684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1001 IncrementalHoareTripleChecker+Valid, 5683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:59,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 297 Invalid, 6684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1001 Valid, 5683 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 19:33:59,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 19:33:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 168. [2022-01-31 19:33:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.098159509202454) internal successors, (179), 163 states have internal predecessors, (179), 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 19:33:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 183 transitions. [2022-01-31 19:33:59,455 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 183 transitions. Word has length 100 [2022-01-31 19:33:59,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:59,455 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 183 transitions. [2022-01-31 19:33:59,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.391304347826087) internal successors, (96), 67 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 19:33:59,455 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 183 transitions. [2022-01-31 19:33:59,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 19:33:59,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:59,456 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2022-01-31 19:33:59,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:33:59,456 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:59,457 INFO L85 PathProgramCache]: Analyzing trace with hash -622365273, now seen corresponding path program 10 times [2022-01-31 19:33:59,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:59,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62486037] [2022-01-31 19:33:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:59,458 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:59,458 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:59,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:59,459 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:59,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:59,551 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 19:33:59,552 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:59,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62486037] [2022-01-31 19:33:59,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [62486037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:59,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:59,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:33:59,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723354659] [2022-01-31 19:33:59,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:59,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:33:59,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:59,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:33:59,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:33:59,553 INFO L87 Difference]: Start difference. First operand 168 states and 183 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:59,950 INFO L93 Difference]: Finished difference Result 249 states and 277 transitions. [2022-01-31 19:33:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:33:59,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-01-31 19:33:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:59,951 INFO L225 Difference]: With dead ends: 249 [2022-01-31 19:33:59,951 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 19:33:59,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:33:59,952 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 181 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:59,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 65 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 19:33:59,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-01-31 19:33:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0789473684210527) internal successors, (123), 114 states have internal predecessors, (123), 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 19:33:59,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2022-01-31 19:33:59,966 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 104 [2022-01-31 19:33:59,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:59,966 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2022-01-31 19:33:59,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:59,966 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2022-01-31 19:33:59,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 19:33:59,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:59,967 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:33:59,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:33:59,967 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:59,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:59,967 INFO L85 PathProgramCache]: Analyzing trace with hash 231027513, now seen corresponding path program 11 times [2022-01-31 19:33:59,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:59,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291039733] [2022-01-31 19:33:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:59,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:59,969 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:59,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:59,970 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:06,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:06,939 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 19:34:06,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:06,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291039733] [2022-01-31 19:34:06,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1291039733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:06,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:06,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 19:34:06,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174959833] [2022-01-31 19:34:06,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:06,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 19:34:06,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:06,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 19:34:06,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=6673, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:34:06,944 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand has 85 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 83 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:18,499 INFO L93 Difference]: Finished difference Result 336 states and 368 transitions. [2022-01-31 19:34:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 19:34:18,500 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 83 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-01-31 19:34:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:18,501 INFO L225 Difference]: With dead ends: 336 [2022-01-31 19:34:18,501 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 19:34:18,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 4 SyntacticMatches, 19 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6419 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1900, Invalid=19856, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 19:34:18,506 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 822 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 7731 mSolverCounterSat, 1497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 9228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1497 IncrementalHoareTripleChecker+Valid, 7731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:18,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 330 Invalid, 9228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1497 Valid, 7731 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-31 19:34:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 19:34:18,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 210. [2022-01-31 19:34:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0731707317073171) internal successors, (220), 205 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 224 transitions. [2022-01-31 19:34:18,541 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 224 transitions. Word has length 118 [2022-01-31 19:34:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:18,541 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 224 transitions. [2022-01-31 19:34:18,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 83 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:18,541 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 224 transitions. [2022-01-31 19:34:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:34:18,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:18,542 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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] [2022-01-31 19:34:18,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:34:18,542 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:18,542 INFO L85 PathProgramCache]: Analyzing trace with hash -307518441, now seen corresponding path program 12 times [2022-01-31 19:34:18,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:18,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967633830] [2022-01-31 19:34:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:18,543 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:18,543 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:18,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:18,544 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:18,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:18,770 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 19:34:18,770 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:18,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967633830] [2022-01-31 19:34:18,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [967633830] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:18,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:18,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:34:18,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955168394] [2022-01-31 19:34:18,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:18,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:34:18,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:34:18,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:34:18,772 INFO L87 Difference]: Start difference. First operand 210 states and 224 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:19,178 INFO L93 Difference]: Finished difference Result 333 states and 354 transitions. [2022-01-31 19:34:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:34:19,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-01-31 19:34:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:19,179 INFO L225 Difference]: With dead ends: 333 [2022-01-31 19:34:19,179 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 19:34:19,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:34:19,180 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 216 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:19,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 58 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:34:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 19:34:19,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2022-01-31 19:34:19,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0681818181818181) internal successors, (141), 132 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2022-01-31 19:34:19,200 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 120 [2022-01-31 19:34:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:19,200 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2022-01-31 19:34:19,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2022-01-31 19:34:19,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 19:34:19,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:19,201 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:34:19,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:34:19,201 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:19,202 INFO L85 PathProgramCache]: Analyzing trace with hash -831896057, now seen corresponding path program 13 times [2022-01-31 19:34:19,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:19,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742692431] [2022-01-31 19:34:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:19,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:19,203 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:19,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:19,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:29,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:29,875 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:29,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742692431] [2022-01-31 19:34:29,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1742692431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:29,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:29,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 19:34:29,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473250080] [2022-01-31 19:34:29,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:29,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 19:34:29,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:29,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 19:34:29,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=9003, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 19:34:29,877 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand has 98 states, 98 states have (on average 1.346938775510204) internal successors, (132), 96 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:53,306 INFO L93 Difference]: Finished difference Result 377 states and 413 transitions. [2022-01-31 19:34:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 19:34:53,308 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.346938775510204) internal successors, (132), 96 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-01-31 19:34:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:53,310 INFO L225 Difference]: With dead ends: 377 [2022-01-31 19:34:53,310 INFO L226 Difference]: Without dead ends: 371 [2022-01-31 19:34:53,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 4 SyntacticMatches, 24 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12638 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=4913, Invalid=37317, Unknown=0, NotChecked=0, Total=42230 [2022-01-31 19:34:53,314 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1768 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 10184 mSolverCounterSat, 4122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1768 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 14306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4122 IncrementalHoareTripleChecker+Valid, 10184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:53,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1768 Valid, 332 Invalid, 14306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4122 Valid, 10184 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-01-31 19:34:53,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-01-31 19:34:53,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 139. [2022-01-31 19:34:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0671641791044777) internal successors, (143), 134 states have internal predecessors, (143), 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 19:34:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 147 transitions. [2022-01-31 19:34:53,355 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 147 transitions. Word has length 136 [2022-01-31 19:34:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:53,356 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 147 transitions. [2022-01-31 19:34:53,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.346938775510204) internal successors, (132), 96 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:53,356 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 147 transitions. [2022-01-31 19:34:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 19:34:53,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:53,356 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 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] [2022-01-31 19:34:53,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:34:53,357 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:53,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash 425147237, now seen corresponding path program 14 times [2022-01-31 19:34:53,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:53,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920483527] [2022-01-31 19:34:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:53,358 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:53,358 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:53,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:53,359 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:53,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:53,502 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 19:34:53,502 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:53,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920483527] [2022-01-31 19:34:53,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [920483527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:53,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:53,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:34:53,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221601831] [2022-01-31 19:34:53,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:53,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:34:53,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:53,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:34:53,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:34:53,503 INFO L87 Difference]: Start difference. First operand 139 states and 147 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 19:34:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:54,014 INFO L93 Difference]: Finished difference Result 383 states and 413 transitions. [2022-01-31 19:34:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:34:54,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 138 [2022-01-31 19:34:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:54,016 INFO L225 Difference]: With dead ends: 383 [2022-01-31 19:34:54,016 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 19:34:54,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:34:54,017 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 296 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:54,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 54 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:34:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 19:34:54,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2022-01-31 19:34:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.06) internal successors, (159), 150 states have internal predecessors, (159), 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 19:34:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2022-01-31 19:34:54,060 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 138 [2022-01-31 19:34:54,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:54,060 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2022-01-31 19:34:54,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 19:34:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2022-01-31 19:34:54,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 19:34:54,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:54,061 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:34:54,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:34:54,061 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:54,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:54,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1141243563, now seen corresponding path program 15 times [2022-01-31 19:34:54,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:54,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143684135] [2022-01-31 19:34:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:54,062 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:54,063 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:54,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:54,063 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:09,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:09,198 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 19:35:09,198 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:09,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143684135] [2022-01-31 19:35:09,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2143684135] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:09,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:09,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 19:35:09,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746997484] [2022-01-31 19:35:09,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:09,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 19:35:09,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:09,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 19:35:09,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=853, Invalid=13909, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 19:35:09,201 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 122 states, 122 states have (on average 1.2295081967213115) internal successors, (150), 120 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:27,320 INFO L93 Difference]: Finished difference Result 396 states and 420 transitions. [2022-01-31 19:35:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 19:35:27,321 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.2295081967213115) internal successors, (150), 120 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-01-31 19:35:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:27,322 INFO L225 Difference]: With dead ends: 396 [2022-01-31 19:35:27,322 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 19:35:27,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 4 SyntacticMatches, 18 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12350 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=2896, Invalid=37304, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 19:35:27,324 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 154 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 8289 mSolverCounterSat, 1307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 9596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1307 IncrementalHoareTripleChecker+Valid, 8289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:27,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 327 Invalid, 9596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1307 Valid, 8289 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-01-31 19:35:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 19:35:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-01-31 19:35:27,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.0592105263157894) internal successors, (161), 152 states have internal predecessors, (161), 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 19:35:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 165 transitions. [2022-01-31 19:35:27,372 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 165 transitions. Word has length 154 [2022-01-31 19:35:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:27,373 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 165 transitions. [2022-01-31 19:35:27,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.2295081967213115) internal successors, (150), 120 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 165 transitions. [2022-01-31 19:35:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 19:35:27,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:27,374 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 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] [2022-01-31 19:35:27,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:35:27,374 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:27,374 INFO L85 PathProgramCache]: Analyzing trace with hash 449568051, now seen corresponding path program 16 times [2022-01-31 19:35:27,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:27,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180185429] [2022-01-31 19:35:27,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:27,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:27,376 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:27,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:27,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:27,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:27,524 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 19:35:27,525 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:27,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180185429] [2022-01-31 19:35:27,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1180185429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:27,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:27,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:35:27,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45086441] [2022-01-31 19:35:27,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:27,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:35:27,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:27,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:35:27,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:35:27,526 INFO L87 Difference]: Start difference. First operand 157 states and 165 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 19:35:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:28,169 INFO L93 Difference]: Finished difference Result 290 states and 312 transitions. [2022-01-31 19:35:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:35:28,171 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 156 [2022-01-31 19:35:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:28,172 INFO L225 Difference]: With dead ends: 290 [2022-01-31 19:35:28,172 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 19:35:28,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:35:28,172 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 364 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:28,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 51 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:35:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 19:35:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-01-31 19:35:28,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0535714285714286) internal successors, (177), 168 states have internal predecessors, (177), 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 19:35:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 181 transitions. [2022-01-31 19:35:28,231 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 181 transitions. Word has length 156 [2022-01-31 19:35:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:28,231 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 181 transitions. [2022-01-31 19:35:28,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 19:35:28,232 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 181 transitions. [2022-01-31 19:35:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:35:28,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:28,232 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:35:28,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:35:28,233 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash 767247651, now seen corresponding path program 17 times [2022-01-31 19:35:28,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:28,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654745408] [2022-01-31 19:35:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:28,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:28,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:28,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:28,237 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:48,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:35:48,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:48,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654745408] [2022-01-31 19:35:48,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [654745408] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:48,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:48,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 19:35:48,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748270946] [2022-01-31 19:35:48,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:48,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 19:35:48,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 19:35:48,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=904, Invalid=17186, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 19:35:48,650 INFO L87 Difference]: Start difference. First operand 173 states and 181 transitions. Second operand has 135 states, 135 states have (on average 1.2444444444444445) internal successors, (168), 133 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:31,065 INFO L93 Difference]: Finished difference Result 610 states and 660 transitions. [2022-01-31 19:36:31,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-01-31 19:36:31,065 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.2444444444444445) internal successors, (168), 133 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-01-31 19:36:31,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:31,069 INFO L225 Difference]: With dead ends: 610 [2022-01-31 19:36:31,069 INFO L226 Difference]: Without dead ends: 602 [2022-01-31 19:36:31,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 5 SyntacticMatches, 23 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22832 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=8573, Invalid=71799, Unknown=0, NotChecked=0, Total=80372 [2022-01-31 19:36:31,072 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2831 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 17901 mSolverCounterSat, 5246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2831 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 23147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5246 IncrementalHoareTripleChecker+Valid, 17901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:31,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2831 Valid, 432 Invalid, 23147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5246 Valid, 17901 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2022-01-31 19:36:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-01-31 19:36:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 298. [2022-01-31 19:36:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.075085324232082) internal successors, (315), 293 states have internal predecessors, (315), 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 19:36:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 319 transitions. [2022-01-31 19:36:31,183 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 319 transitions. Word has length 172 [2022-01-31 19:36:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:31,183 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 319 transitions. [2022-01-31 19:36:31,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.2444444444444445) internal successors, (168), 133 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:31,184 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 319 transitions. [2022-01-31 19:36:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 19:36:31,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:31,184 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 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] [2022-01-31 19:36:31,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:36:31,185 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:31,185 INFO L85 PathProgramCache]: Analyzing trace with hash -396041343, now seen corresponding path program 18 times [2022-01-31 19:36:31,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:31,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303858263] [2022-01-31 19:36:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:31,186 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:31,186 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:31,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:31,187 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:31,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:31,364 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 19:36:31,364 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:31,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303858263] [2022-01-31 19:36:31,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [303858263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:31,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:31,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:36:31,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931574355] [2022-01-31 19:36:31,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:31,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:36:31,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:31,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:36:31,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:36:31,366 INFO L87 Difference]: Start difference. First operand 298 states and 319 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:32,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:32,104 INFO L93 Difference]: Finished difference Result 589 states and 631 transitions. [2022-01-31 19:36:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 19:36:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-01-31 19:36:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:32,105 INFO L225 Difference]: With dead ends: 589 [2022-01-31 19:36:32,105 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 19:36:32,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:36:32,106 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 454 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:32,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 47 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:36:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 19:36:32,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 189. [2022-01-31 19:36:32,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.048913043478261) internal successors, (193), 184 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 19:36:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 197 transitions. [2022-01-31 19:36:32,174 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 197 transitions. Word has length 174 [2022-01-31 19:36:32,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:32,174 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 197 transitions. [2022-01-31 19:36:32,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 197 transitions. [2022-01-31 19:36:32,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 19:36:32,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:32,175 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2022-01-31 19:36:32,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:36:32,175 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:32,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:32,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1042411757, now seen corresponding path program 19 times [2022-01-31 19:36:32,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:32,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101254702] [2022-01-31 19:36:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:32,176 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:32,177 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:32,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:32,177 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:32,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:32,390 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 19:36:32,390 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:32,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101254702] [2022-01-31 19:36:32,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [101254702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:32,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:32,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:36:32,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120250006] [2022-01-31 19:36:32,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:32,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:36:32,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:32,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:36:32,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:36:32,392 INFO L87 Difference]: Start difference. First operand 189 states and 197 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:33,081 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2022-01-31 19:36:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:36:33,081 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-01-31 19:36:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:33,082 INFO L225 Difference]: With dead ends: 196 [2022-01-31 19:36:33,082 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 19:36:33,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=1230, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:36:33,083 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 288 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:33,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 75 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:36:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 19:36:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-01-31 19:36:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0483870967741935) internal successors, (195), 186 states have internal predecessors, (195), 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 19:36:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 199 transitions. [2022-01-31 19:36:33,155 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 199 transitions. Word has length 188 [2022-01-31 19:36:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:33,155 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 199 transitions. [2022-01-31 19:36:33,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 199 transitions. [2022-01-31 19:36:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 19:36:33,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:33,156 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:36:33,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:36:33,157 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:33,157 INFO L85 PathProgramCache]: Analyzing trace with hash -16977551, now seen corresponding path program 20 times [2022-01-31 19:36:33,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:33,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531536146] [2022-01-31 19:36:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:33,159 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:33,159 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:33,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:33,160 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:00,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:00,511 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:00,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531536146] [2022-01-31 19:37:00,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1531536146] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:00,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:00,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-01-31 19:37:00,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554566713] [2022-01-31 19:37:00,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:00,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-01-31 19:37:00,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-01-31 19:37:00,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1094, Invalid=22468, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 19:37:00,514 INFO L87 Difference]: Start difference. First operand 191 states and 199 transitions. Second operand has 154 states, 154 states have (on average 1.2077922077922079) internal successors, (186), 152 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:31,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:31,873 INFO L93 Difference]: Finished difference Result 574 states and 602 transitions. [2022-01-31 19:37:31,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-01-31 19:37:31,875 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.2077922077922079) internal successors, (186), 152 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have 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 19:37:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:31,876 INFO L225 Difference]: With dead ends: 574 [2022-01-31 19:37:31,876 INFO L226 Difference]: Without dead ends: 424 [2022-01-31 19:37:31,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 4 SyntacticMatches, 22 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22952 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=3493, Invalid=65939, Unknown=0, NotChecked=0, Total=69432 [2022-01-31 19:37:31,879 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 123 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 16723 mSolverCounterSat, 952 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 17675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 16723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:31,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 350 Invalid, 17675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [952 Valid, 16723 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-01-31 19:37:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-31 19:37:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 358. [2022-01-31 19:37:32,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 353 states have (on average 1.0509915014164306) internal successors, (371), 353 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:32,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 375 transitions. [2022-01-31 19:37:32,047 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 375 transitions. Word has length 190 [2022-01-31 19:37:32,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:32,047 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 375 transitions. [2022-01-31 19:37:32,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.2077922077922079) internal successors, (186), 152 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 375 transitions. [2022-01-31 19:37:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 19:37:32,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:32,048 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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] [2022-01-31 19:37:32,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:37:32,049 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:32,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1877783631, now seen corresponding path program 21 times [2022-01-31 19:37:32,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:32,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753275808] [2022-01-31 19:37:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:32,051 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:32,051 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:32,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:32,052 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:32,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:32,273 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:32,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753275808] [2022-01-31 19:37:32,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753275808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:32,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:32,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:37:32,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953011534] [2022-01-31 19:37:32,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:32,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:37:32,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:32,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:37:32,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:37:32,274 INFO L87 Difference]: Start difference. First operand 358 states and 375 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 19:37:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:33,168 INFO L93 Difference]: Finished difference Result 755 states and 796 transitions. [2022-01-31 19:37:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:37:33,169 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 192 [2022-01-31 19:37:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:33,170 INFO L225 Difference]: With dead ends: 755 [2022-01-31 19:37:33,170 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 19:37:33,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:37:33,171 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 459 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:33,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 59 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:37:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 19:37:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 327. [2022-01-31 19:37:33,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 322 states have (on average 1.046583850931677) internal successors, (337), 322 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 19:37:33,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 341 transitions. [2022-01-31 19:37:33,316 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 341 transitions. Word has length 192 [2022-01-31 19:37:33,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:33,317 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 341 transitions. [2022-01-31 19:37:33,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 19:37:33,317 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 341 transitions. [2022-01-31 19:37:33,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 19:37:33,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:33,318 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2022-01-31 19:37:33,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:37:33,318 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:33,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2092215149, now seen corresponding path program 22 times [2022-01-31 19:37:33,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:33,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944166653] [2022-01-31 19:37:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:33,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:33,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:33,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:33,320 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:33,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:33,556 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 19:37:33,557 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:33,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944166653] [2022-01-31 19:37:33,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [944166653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:33,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:33,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:37:33,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348435840] [2022-01-31 19:37:33,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:33,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:37:33,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:33,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:37:33,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:37:33,558 INFO L87 Difference]: Start difference. First operand 327 states and 341 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 19:37:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:34,382 INFO L93 Difference]: Finished difference Result 334 states and 348 transitions. [2022-01-31 19:37:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:37:34,382 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 194 [2022-01-31 19:37:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:34,383 INFO L225 Difference]: With dead ends: 334 [2022-01-31 19:37:34,383 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 19:37:34,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=400, Invalid=1492, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:37:34,384 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 529 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:34,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 59 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:37:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 19:37:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-01-31 19:37:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0441176470588236) internal successors, (213), 204 states have internal predecessors, (213), 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 19:37:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 217 transitions. [2022-01-31 19:37:34,475 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 217 transitions. Word has length 194 [2022-01-31 19:37:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:34,475 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 217 transitions. [2022-01-31 19:37:34,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 19:37:34,476 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 217 transitions. [2022-01-31 19:37:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 19:37:34,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:34,476 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:37:34,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:37:34,477 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:34,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1659509185, now seen corresponding path program 23 times [2022-01-31 19:37:34,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:34,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995270118] [2022-01-31 19:37:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:34,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:34,478 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:34,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:34,479 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:06,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:07,007 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:07,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995270118] [2022-01-31 19:38:07,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995270118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:07,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:07,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-01-31 19:38:07,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717393214] [2022-01-31 19:38:07,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:07,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-01-31 19:38:07,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:07,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-01-31 19:38:07,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1887, Invalid=25173, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 19:38:07,010 INFO L87 Difference]: Start difference. First operand 209 states and 217 transitions. Second operand has 165 states, 165 states have (on average 1.2363636363636363) internal successors, (204), 163 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 19:39:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:04,215 INFO L93 Difference]: Finished difference Result 797 states and 838 transitions. [2022-01-31 19:39:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-01-31 19:39:04,216 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.2363636363636363) internal successors, (204), 163 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 19:39:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:04,219 INFO L225 Difference]: With dead ends: 797 [2022-01-31 19:39:04,219 INFO L226 Difference]: Without dead ends: 700 [2022-01-31 19:39:04,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 4 SyntacticMatches, 29 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37650 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=11435, Invalid=101797, Unknown=0, NotChecked=0, Total=113232 [2022-01-31 19:39:04,223 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 888 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 20497 mSolverCounterSat, 4311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 24808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4311 IncrementalHoareTripleChecker+Valid, 20497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:04,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 372 Invalid, 24808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4311 Valid, 20497 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2022-01-31 19:39:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-01-31 19:39:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 488. [2022-01-31 19:39:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 483 states have (on average 1.049689440993789) internal successors, (507), 483 states have internal predecessors, (507), 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 19:39:04,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 511 transitions. [2022-01-31 19:39:04,495 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 511 transitions. Word has length 208 [2022-01-31 19:39:04,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:04,496 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 511 transitions. [2022-01-31 19:39:04,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.2363636363636363) internal successors, (204), 163 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 19:39:04,496 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 511 transitions. [2022-01-31 19:39:04,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 19:39:04,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:04,498 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 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] [2022-01-31 19:39:04,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:39:04,498 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:04,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:04,498 INFO L85 PathProgramCache]: Analyzing trace with hash -342119011, now seen corresponding path program 24 times [2022-01-31 19:39:04,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:04,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467481910] [2022-01-31 19:39:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:04,500 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:04,500 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:04,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:04,501 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:04,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:04,763 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 19:39:04,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:04,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467481910] [2022-01-31 19:39:04,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [467481910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:04,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:04,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:39:04,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596104005] [2022-01-31 19:39:04,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:04,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:39:04,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:04,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:39:04,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:39:04,765 INFO L87 Difference]: Start difference. First operand 488 states and 511 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 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 19:39:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:05,814 INFO L93 Difference]: Finished difference Result 920 states and 967 transitions. [2022-01-31 19:39:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:39:05,814 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 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 210 [2022-01-31 19:39:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:05,816 INFO L225 Difference]: With dead ends: 920 [2022-01-31 19:39:05,816 INFO L226 Difference]: Without dead ends: 395 [2022-01-31 19:39:05,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:39:05,817 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 518 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:05,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 65 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:39:05,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-01-31 19:39:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 379. [2022-01-31 19:39:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 374 states have (on average 1.0427807486631016) internal successors, (390), 374 states have internal predecessors, (390), 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 19:39:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 394 transitions. [2022-01-31 19:39:06,045 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 394 transitions. Word has length 210 [2022-01-31 19:39:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:06,045 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 394 transitions. [2022-01-31 19:39:06,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 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 19:39:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 394 transitions. [2022-01-31 19:39:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 19:39:06,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:06,046 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 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] [2022-01-31 19:39:06,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:39:06,046 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:06,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:06,047 INFO L85 PathProgramCache]: Analyzing trace with hash 288845725, now seen corresponding path program 25 times [2022-01-31 19:39:06,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:06,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644162722] [2022-01-31 19:39:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:06,048 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:06,049 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:06,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:06,050 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:06,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:06,304 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:06,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644162722] [2022-01-31 19:39:06,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1644162722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:06,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:06,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:39:06,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196393914] [2022-01-31 19:39:06,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:06,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:39:06,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:39:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:39:06,306 INFO L87 Difference]: Start difference. First operand 379 states and 394 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 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 19:39:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:07,280 INFO L93 Difference]: Finished difference Result 386 states and 401 transitions. [2022-01-31 19:39:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:39:07,280 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 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 210 [2022-01-31 19:39:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:07,281 INFO L225 Difference]: With dead ends: 386 [2022-01-31 19:39:07,281 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 19:39:07,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=477, Invalid=1779, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:39:07,282 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 574 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:07,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 49 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:39:07,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 19:39:07,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-01-31 19:39:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0405405405405406) internal successors, (231), 222 states have internal predecessors, (231), 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 19:39:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 235 transitions. [2022-01-31 19:39:07,397 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 235 transitions. Word has length 210 [2022-01-31 19:39:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:07,397 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 235 transitions. [2022-01-31 19:39:07,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 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 19:39:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 235 transitions. [2022-01-31 19:39:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 19:39:07,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:07,398 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:39:07,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:39:07,398 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:07,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:07,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1788542067, now seen corresponding path program 26 times [2022-01-31 19:39:07,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:07,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929065055] [2022-01-31 19:39:07,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:07,400 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:07,400 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:07,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:07,401 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:51,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:51,704 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 19:39:51,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:51,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929065055] [2022-01-31 19:39:51,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929065055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:51,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:51,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [186] imperfect sequences [] total 186 [2022-01-31 19:39:51,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849858196] [2022-01-31 19:39:51,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:51,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2022-01-31 19:39:51,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:51,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2022-01-31 19:39:51,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1875, Invalid=32535, Unknown=0, NotChecked=0, Total=34410 [2022-01-31 19:39:51,707 INFO L87 Difference]: Start difference. First operand 227 states and 235 transitions. Second operand has 186 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 184 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:04,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:04,428 INFO L93 Difference]: Finished difference Result 900 states and 945 transitions. [2022-01-31 19:41:04,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 270 states. [2022-01-31 19:41:04,428 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 184 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2022-01-31 19:41:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:04,430 INFO L225 Difference]: With dead ends: 900 [2022-01-31 19:41:04,430 INFO L226 Difference]: Without dead ends: 721 [2022-01-31 19:41:04,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 4 SyntacticMatches, 26 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53482 ImplicationChecksByTransitivity, 81.6s TimeCoverageRelationStatistics Valid=11104, Invalid=146902, Unknown=0, NotChecked=0, Total=158006 [2022-01-31 19:41:04,437 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1111 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 23844 mSolverCounterSat, 3709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 27553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3709 IncrementalHoareTripleChecker+Valid, 23844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:04,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 358 Invalid, 27553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3709 Valid, 23844 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2022-01-31 19:41:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-01-31 19:41:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 498. [2022-01-31 19:41:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 493 states have (on average 1.0425963488843812) internal successors, (514), 493 states have internal predecessors, (514), 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 19:41:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 518 transitions. [2022-01-31 19:41:04,741 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 518 transitions. Word has length 226 [2022-01-31 19:41:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:04,741 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 518 transitions. [2022-01-31 19:41:04,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 184 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 518 transitions. [2022-01-31 19:41:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-31 19:41:04,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:04,742 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 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] [2022-01-31 19:41:04,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:41:04,743 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:04,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:04,743 INFO L85 PathProgramCache]: Analyzing trace with hash 211332971, now seen corresponding path program 27 times [2022-01-31 19:41:04,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:04,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748174107] [2022-01-31 19:41:04,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:04,744 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:04,744 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:04,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:04,745 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:04,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:04,992 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 19:41:04,993 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:04,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748174107] [2022-01-31 19:41:04,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [748174107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:04,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:04,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:41:04,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749233440] [2022-01-31 19:41:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:04,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:41:04,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:41:04,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:41:04,994 INFO L87 Difference]: Start difference. First operand 498 states and 518 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 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 19:41:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:06,194 INFO L93 Difference]: Finished difference Result 842 states and 881 transitions. [2022-01-31 19:41:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:41:06,194 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 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 228 [2022-01-31 19:41:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:06,195 INFO L225 Difference]: With dead ends: 842 [2022-01-31 19:41:06,195 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 19:41:06,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=1204, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:41:06,196 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 628 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:06,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 52 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:41:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 19:41:06,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 245. [2022-01-31 19:41:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0375) internal successors, (249), 240 states have internal predecessors, (249), 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 19:41:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 253 transitions. [2022-01-31 19:41:06,348 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 253 transitions. Word has length 228 [2022-01-31 19:41:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:06,349 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 253 transitions. [2022-01-31 19:41:06,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 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 19:41:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 253 transitions. [2022-01-31 19:41:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-31 19:41:06,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:06,350 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:41:06,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:41:06,350 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:06,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1554962085, now seen corresponding path program 28 times [2022-01-31 19:41:06,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:06,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113591572] [2022-01-31 19:41:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:06,352 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:06,352 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:06,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:06,353 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:02,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:02,180 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 19:42:02,180 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113591572] [2022-01-31 19:42:02,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1113591572] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:02,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:02,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [211] imperfect sequences [] total 211 [2022-01-31 19:42:02,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312452924] [2022-01-31 19:42:02,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:02,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2022-01-31 19:42:02,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:02,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2022-01-31 19:42:02,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2249, Invalid=42061, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 19:42:02,184 INFO L87 Difference]: Start difference. First operand 245 states and 253 transitions. Second operand has 211 states, 211 states have (on average 1.1374407582938388) internal successors, (240), 209 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:48,200 INFO L93 Difference]: Finished difference Result 452 states and 473 transitions. [2022-01-31 19:42:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 19:42:48,201 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 1.1374407582938388) internal successors, (240), 209 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2022-01-31 19:42:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:48,202 INFO L225 Difference]: With dead ends: 452 [2022-01-31 19:42:48,202 INFO L226 Difference]: Without dead ends: 447 [2022-01-31 19:42:48,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 4 SyntacticMatches, 18 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29279 ImplicationChecksByTransitivity, 64.0s TimeCoverageRelationStatistics Valid=5731, Invalid=106159, Unknown=0, NotChecked=0, Total=111890 [2022-01-31 19:42:48,206 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 70 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 24086 mSolverCounterSat, 1675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 25761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1675 IncrementalHoareTripleChecker+Valid, 24086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:48,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 418 Invalid, 25761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1675 Valid, 24086 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2022-01-31 19:42:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-31 19:42:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 406. [2022-01-31 19:42:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 401 states have (on average 1.0399002493765586) internal successors, (417), 401 states have internal predecessors, (417), 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 19:42:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 421 transitions. [2022-01-31 19:42:48,494 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 421 transitions. Word has length 244 [2022-01-31 19:42:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:48,494 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 421 transitions. [2022-01-31 19:42:48,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 1.1374407582938388) internal successors, (240), 209 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 421 transitions. [2022-01-31 19:42:48,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 19:42:48,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:48,496 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 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] [2022-01-31 19:42:48,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:42:48,496 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:48,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2051337017, now seen corresponding path program 29 times [2022-01-31 19:42:48,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:48,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212527470] [2022-01-31 19:42:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:48,498 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:48,498 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:48,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:48,500 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:48,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:48,848 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 19:42:48,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:48,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212527470] [2022-01-31 19:42:48,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1212527470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:48,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:48,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:42:48,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63124888] [2022-01-31 19:42:48,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:48,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:42:48,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:48,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:42:48,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:42:48,850 INFO L87 Difference]: Start difference. First operand 406 states and 421 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 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 19:42:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:50,197 INFO L93 Difference]: Finished difference Result 830 states and 866 transitions. [2022-01-31 19:42:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:42:50,197 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 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 246 [2022-01-31 19:42:50,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:50,198 INFO L225 Difference]: With dead ends: 830 [2022-01-31 19:42:50,198 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 19:42:50,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:42:50,199 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 850 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:50,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 55 Invalid, 2360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:42:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 19:42:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 417. [2022-01-31 19:42:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 412 states have (on average 1.0364077669902914) internal successors, (427), 412 states have internal predecessors, (427), 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 19:42:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 431 transitions. [2022-01-31 19:42:50,509 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 431 transitions. Word has length 246 [2022-01-31 19:42:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:50,509 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 431 transitions. [2022-01-31 19:42:50,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 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 19:42:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 431 transitions. [2022-01-31 19:42:50,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-31 19:42:50,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:50,511 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 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] [2022-01-31 19:42:50,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:42:50,511 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:50,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1169498537, now seen corresponding path program 30 times [2022-01-31 19:42:50,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:50,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131884487] [2022-01-31 19:42:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:50,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:50,512 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:50,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:50,513 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:50,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:50,789 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:50,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131884487] [2022-01-31 19:42:50,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1131884487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:50,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:50,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:42:50,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130849950] [2022-01-31 19:42:50,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:50,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:42:50,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:50,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:42:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:42:50,790 INFO L87 Difference]: Start difference. First operand 417 states and 431 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 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 19:42:52,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:52,032 INFO L93 Difference]: Finished difference Result 424 states and 438 transitions. [2022-01-31 19:42:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:42:52,032 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 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 248 [2022-01-31 19:42:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:52,033 INFO L225 Difference]: With dead ends: 424 [2022-01-31 19:42:52,033 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 19:42:52,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=2428, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:42:52,034 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 623 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:52,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 51 Invalid, 2682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2093 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:42:52,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 19:42:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-01-31 19:42:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0348837209302326) internal successors, (267), 258 states have internal predecessors, (267), 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 19:42:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 271 transitions. [2022-01-31 19:42:52,223 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 271 transitions. Word has length 248 [2022-01-31 19:42:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:52,223 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 271 transitions. [2022-01-31 19:42:52,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 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 19:42:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 271 transitions. [2022-01-31 19:42:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-01-31 19:42:52,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:52,224 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:42:52,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:42:52,224 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1044985769, now seen corresponding path program 31 times [2022-01-31 19:42:52,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:52,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272578603] [2022-01-31 19:42:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:52,226 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:52,226 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:52,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:52,227 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:49,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:49,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:49,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272578603] [2022-01-31 19:43:49,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [272578603] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:49,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:49,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [213] imperfect sequences [] total 213 [2022-01-31 19:43:49,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303060388] [2022-01-31 19:43:49,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:49,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-01-31 19:43:49,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:49,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-01-31 19:43:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3024, Invalid=42132, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 19:43:49,846 INFO L87 Difference]: Start difference. First operand 263 states and 271 transitions. Second operand has 213 states, 213 states have (on average 1.2112676056338028) internal successors, (258), 211 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:52,738 INFO L93 Difference]: Finished difference Result 903 states and 935 transitions. [2022-01-31 19:44:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-01-31 19:44:52,738 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.2112676056338028) internal successors, (258), 211 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2022-01-31 19:44:52,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:52,740 INFO L225 Difference]: With dead ends: 903 [2022-01-31 19:44:52,740 INFO L226 Difference]: Without dead ends: 472 [2022-01-31 19:44:52,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 5 SyntacticMatches, 34 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48214 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=7851, Invalid=123555, Unknown=0, NotChecked=0, Total=131406 [2022-01-31 19:44:52,745 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 24552 mSolverCounterSat, 3301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 27853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3301 IncrementalHoareTripleChecker+Valid, 24552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:52,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 421 Invalid, 27853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3301 Valid, 24552 Invalid, 0 Unknown, 0 Unchecked, 20.2s Time] [2022-01-31 19:44:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-31 19:44:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 438. [2022-01-31 19:44:53,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 433 states have (on average 1.0369515011547343) internal successors, (449), 433 states have internal predecessors, (449), 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 19:44:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 453 transitions. [2022-01-31 19:44:53,065 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 453 transitions. Word has length 262 [2022-01-31 19:44:53,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:53,066 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 453 transitions. [2022-01-31 19:44:53,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.2112676056338028) internal successors, (258), 211 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 453 transitions. [2022-01-31 19:44:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-31 19:44:53,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:53,067 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 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] [2022-01-31 19:44:53,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:44:53,067 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1677187739, now seen corresponding path program 32 times [2022-01-31 19:44:53,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:53,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293433394] [2022-01-31 19:44:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:53,069 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:53,069 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:53,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:53,070 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:53,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:53,381 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 19:44:53,381 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:53,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293433394] [2022-01-31 19:44:53,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [293433394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:53,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:53,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:44:53,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682227889] [2022-01-31 19:44:53,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:53,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:44:53,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:53,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:44:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:44:53,382 INFO L87 Difference]: Start difference. First operand 438 states and 453 transitions. Second operand has 32 states, 32 states have (on average 2.875) internal successors, (92), 31 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 19:44:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:54,704 INFO L93 Difference]: Finished difference Result 627 states and 655 transitions. [2022-01-31 19:44:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:44:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 31 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 266 [2022-01-31 19:44:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:54,705 INFO L225 Difference]: With dead ends: 627 [2022-01-31 19:44:54,705 INFO L226 Difference]: Without dead ends: 281 [2022-01-31 19:44:54,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=750, Invalid=2790, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:44:54,706 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 650 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 2805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:54,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 79 Invalid, 2805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 2194 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:44:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-31 19:44:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-01-31 19:44:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0326086956521738) internal successors, (285), 276 states have internal predecessors, (285), 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 19:44:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 289 transitions. [2022-01-31 19:44:54,917 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 289 transitions. Word has length 266 [2022-01-31 19:44:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:54,918 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 289 transitions. [2022-01-31 19:44:54,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 31 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 19:44:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 289 transitions. [2022-01-31 19:44:54,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-01-31 19:44:54,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:54,919 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-31 19:44:54,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:44:54,919 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:54,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:54,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1480323465, now seen corresponding path program 33 times [2022-01-31 19:44:54,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:54,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051868485] [2022-01-31 19:44:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:54,921 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:54,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:54,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:54,922 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:09,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:09,927 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 19:46:09,927 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051868485] [2022-01-31 19:46:09,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051868485] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:09,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:09,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [231] imperfect sequences [] total 231 [2022-01-31 19:46:09,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051266180] [2022-01-31 19:46:09,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:09,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 231 states [2022-01-31 19:46:09,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:09,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 231 interpolants. [2022-01-31 19:46:09,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3413, Invalid=49717, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 19:46:09,931 INFO L87 Difference]: Start difference. First operand 281 states and 289 transitions. Second operand has 231 states, 231 states have (on average 1.1948051948051948) internal successors, (276), 229 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)