/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-examples/standard_copy3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:12:45,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:12:45,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:12:45,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 17:12:45,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 17:12:45,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 17:12:45,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 17:12:45,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 17:12:45,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 17:12:45,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 17:12:45,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 17:12:45,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 17:12:45,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:12:45,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:12:45,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:12:45,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:12:45,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:12:45,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:12:45,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:12:45,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:12:45,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:12:45,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:12:45,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:12:45,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:12:45,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:12:45,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:12:45,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:12:45,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:12:45,952 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 17:12:45,962 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:12:45,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:12:45,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:12:45,964 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:12:45,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:12:45,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:12:45,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:12:45,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:12:45,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:12:45,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:12:45,965 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:12:45,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:12:45,965 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:12:45,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:12:45,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:12:45,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:12:45,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:12:45,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:12:45,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:12:45,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:12:45,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:12:45,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:12:45,966 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:12:45,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:12:46,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:12:46,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:12:46,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:12:46,156 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:12:46,156 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:12:46,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2022-01-31 17:12:46,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93ddad8b7/8728c5c025dc4d3387c1896e5c4dfd5d/FLAG225164dbd [2022-01-31 17:12:46,584 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:12:46,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy3_ground-1.i [2022-01-31 17:12:46,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93ddad8b7/8728c5c025dc4d3387c1896e5c4dfd5d/FLAG225164dbd [2022-01-31 17:12:46,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93ddad8b7/8728c5c025dc4d3387c1896e5c4dfd5d [2022-01-31 17:12:46,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:12:46,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:12:46,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:12:46,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:12:46,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:12:46,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:12:46" (1/1) ... [2022-01-31 17:12:46,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bcc3840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:12:46, skipping insertion in model container [2022-01-31 17:12:46,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:12:46" (1/1) ... [2022-01-31 17:12:46,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:12:46,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:12:46,770 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-examples/standard_copy3_ground-1.i[816,829] [2022-01-31 17:12:46,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:12:46,792 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:12:46,829 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-examples/standard_copy3_ground-1.i[816,829] [2022-01-31 17:12:46,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:12:46,851 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:12:46,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:12:46 WrapperNode [2022-01-31 17:12:46,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:12:46,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:12:46,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:12:46,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:12:46,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:12:46" (1/1) ... [2022-01-31 17:12:46,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:12:46" (1/1) ... [2022-01-31 17:12:46,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:12:46" (1/1) ... [2022-01-31 17:12:46,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:12:46" (1/1) ... [2022-01-31 17:12:46,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:12:46" (1/1) ... [2022-01-31 17:12:46,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:12:46" (1/1) ... [2022-01-31 17:12:46,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:12:46" (1/1) ... [2022-01-31 17:12:46,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:12:46,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:12:46,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:12:46,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:12:46,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:12:46" (1/1) ... [2022-01-31 17:12:46,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:12:46,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:12:46,911 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 17:12:46,932 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 17:12:46,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:12:46,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:12:46,947 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:12:46,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:12:46,947 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:12:46,947 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:12:46,947 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:12:46,948 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:12:46,948 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:12:46,948 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:12:46,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:12:46,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:12:46,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:12:46,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:12:46,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:12:46,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:12:46,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:12:46,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:12:46,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:12:46,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:12:46,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:12:46,998 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:12:46,999 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:12:47,158 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:12:47,162 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:12:47,163 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 17:12:47,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:12:47 BoogieIcfgContainer [2022-01-31 17:12:47,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:12:47,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:12:47,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:12:47,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:12:47,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:12:46" (1/3) ... [2022-01-31 17:12:47,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cc4c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:12:47, skipping insertion in model container [2022-01-31 17:12:47,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:12:46" (2/3) ... [2022-01-31 17:12:47,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cc4c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:12:47, skipping insertion in model container [2022-01-31 17:12:47,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:12:47" (3/3) ... [2022-01-31 17:12:47,171 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2022-01-31 17:12:47,175 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:12:47,175 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:12:47,218 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:12:47,223 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 17:12:47,235 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:12:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 17:12:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 17:12:47,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:47,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:47,255 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:47,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1851635865, now seen corresponding path program 1 times [2022-01-31 17:12:47,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:47,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379393043] [2022-01-31 17:12:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:47,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:47,346 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:47,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:47,520 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:47,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379393043] [2022-01-31 17:12:47,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [379393043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:47,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:47,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:12:47,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759027195] [2022-01-31 17:12:47,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:47,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:12:47,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:47,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:12:47,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:12:47,554 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:47,595 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2022-01-31 17:12:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:12:47,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 17:12:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:47,602 INFO L225 Difference]: With dead ends: 58 [2022-01-31 17:12:47,603 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 17:12:47,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:12:47,609 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:47,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:12:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 17:12:47,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-31 17:12:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 17:12:47,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2022-01-31 17:12:47,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:47,638 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 17:12:47,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 17:12:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 17:12:47,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:47,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:47,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:12:47,640 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:47,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:47,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2100555739, now seen corresponding path program 1 times [2022-01-31 17:12:47,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:47,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342571303] [2022-01-31 17:12:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:47,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:47,643 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:47,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:47,725 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 17:12:47,725 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342571303] [2022-01-31 17:12:47,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342571303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:47,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:47,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:12:47,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529059574] [2022-01-31 17:12:47,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:47,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:12:47,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:47,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:12:47,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:12:47,728 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:47,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:47,805 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-01-31 17:12:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:12:47,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 17:12:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:47,808 INFO L225 Difference]: With dead ends: 50 [2022-01-31 17:12:47,808 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 17:12:47,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:12:47,809 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:47,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:47,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 17:12:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 17:12:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 17:12:47,815 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2022-01-31 17:12:47,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:47,815 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 17:12:47,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 17:12:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 17:12:47,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:47,816 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] [2022-01-31 17:12:47,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:12:47,816 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:47,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash -511118855, now seen corresponding path program 1 times [2022-01-31 17:12:47,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:47,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123519801] [2022-01-31 17:12:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:47,830 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:47,830 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:47,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:47,833 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:47,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:47,912 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 17:12:47,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123519801] [2022-01-31 17:12:47,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1123519801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:47,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:47,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:12:47,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589012492] [2022-01-31 17:12:47,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:47,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:12:47,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:47,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:12:47,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:12:47,916 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:47,982 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-01-31 17:12:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:12:47,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 17:12:47,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:47,985 INFO L225 Difference]: With dead ends: 52 [2022-01-31 17:12:47,985 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 17:12:47,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:12:47,992 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:47,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:12:47,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 17:12:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-01-31 17:12:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-31 17:12:48,005 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2022-01-31 17:12:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:48,005 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-31 17:12:48,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-31 17:12:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 17:12:48,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:48,006 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] [2022-01-31 17:12:48,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:12:48,006 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2069502825, now seen corresponding path program 2 times [2022-01-31 17:12:48,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:48,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553996905] [2022-01-31 17:12:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:48,009 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:48,009 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:48,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:48,010 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:48,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:48,060 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 17:12:48,060 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:48,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553996905] [2022-01-31 17:12:48,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [553996905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:48,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:48,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:12:48,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573757291] [2022-01-31 17:12:48,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:48,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:12:48,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:48,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:12:48,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:12:48,062 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:48,129 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-01-31 17:12:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:12:48,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 17:12:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:48,130 INFO L225 Difference]: With dead ends: 54 [2022-01-31 17:12:48,130 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 17:12:48,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:12:48,131 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:48,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 32 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 17:12:48,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-01-31 17:12:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-01-31 17:12:48,135 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2022-01-31 17:12:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:48,135 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-01-31 17:12:48,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-01-31 17:12:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 17:12:48,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:48,136 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] [2022-01-31 17:12:48,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:12:48,136 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash -633192975, now seen corresponding path program 1 times [2022-01-31 17:12:48,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:48,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851816967] [2022-01-31 17:12:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:48,139 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:48,139 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:48,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:48,140 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:48,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:48,193 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 17:12:48,193 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:48,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851816967] [2022-01-31 17:12:48,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1851816967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:48,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:48,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:12:48,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543455599] [2022-01-31 17:12:48,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:48,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:12:48,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:48,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:12:48,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:12:48,195 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:48,268 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-01-31 17:12:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:12:48,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 17:12:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:48,273 INFO L225 Difference]: With dead ends: 62 [2022-01-31 17:12:48,273 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 17:12:48,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:12:48,277 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:48,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 37 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 17:12:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-01-31 17:12:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:48,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-01-31 17:12:48,281 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 29 [2022-01-31 17:12:48,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:48,281 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-01-31 17:12:48,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,282 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-01-31 17:12:48,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:12:48,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:48,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:48,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:12:48,282 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:48,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1000631243, now seen corresponding path program 2 times [2022-01-31 17:12:48,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:48,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254400197] [2022-01-31 17:12:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:48,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:48,285 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:48,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:48,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:48,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:48,345 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 17:12:48,346 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:48,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254400197] [2022-01-31 17:12:48,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254400197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:48,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:48,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:12:48,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169062152] [2022-01-31 17:12:48,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:48,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:12:48,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:48,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:12:48,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:12:48,347 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:48,399 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2022-01-31 17:12:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:12:48,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 17:12:48,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:48,400 INFO L225 Difference]: With dead ends: 72 [2022-01-31 17:12:48,400 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 17:12:48,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:12:48,401 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:48,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 36 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:12:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 17:12:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-01-31 17:12:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-01-31 17:12:48,406 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 35 [2022-01-31 17:12:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:48,407 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-01-31 17:12:48,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-01-31 17:12:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 17:12:48,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:48,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:48,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:12:48,408 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:48,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:48,408 INFO L85 PathProgramCache]: Analyzing trace with hash 496857577, now seen corresponding path program 3 times [2022-01-31 17:12:48,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:48,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097312551] [2022-01-31 17:12:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:48,410 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:48,410 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:48,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:48,411 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:48,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:48,484 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:48,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097312551] [2022-01-31 17:12:48,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1097312551] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:48,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:48,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:12:48,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133117861] [2022-01-31 17:12:48,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:48,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:12:48,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:12:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:12:48,486 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:48,559 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2022-01-31 17:12:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:12:48,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 17:12:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:48,560 INFO L225 Difference]: With dead ends: 74 [2022-01-31 17:12:48,560 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 17:12:48,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:12:48,561 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:48,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:12:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 17:12:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-01-31 17:12:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-01-31 17:12:48,565 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2022-01-31 17:12:48,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:48,565 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-01-31 17:12:48,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,566 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-01-31 17:12:48,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:12:48,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:48,566 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:48,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:12:48,566 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:48,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1701668999, now seen corresponding path program 4 times [2022-01-31 17:12:48,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:48,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559661504] [2022-01-31 17:12:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:48,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:48,569 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:48,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:48,569 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:48,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:48,635 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 17:12:48,636 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:48,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559661504] [2022-01-31 17:12:48,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559661504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:48,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:48,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:12:48,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805570053] [2022-01-31 17:12:48,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:48,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:12:48,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:48,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:12:48,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:12:48,637 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:48,712 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-01-31 17:12:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:12:48,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 17:12:48,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:48,713 INFO L225 Difference]: With dead ends: 76 [2022-01-31 17:12:48,713 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 17:12:48,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:12:48,714 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:48,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 41 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:12:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 17:12:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-01-31 17:12:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-01-31 17:12:48,719 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2022-01-31 17:12:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:48,719 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-01-31 17:12:48,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-01-31 17:12:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 17:12:48,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:48,720 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:48,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:12:48,720 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:48,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:48,721 INFO L85 PathProgramCache]: Analyzing trace with hash -115724379, now seen corresponding path program 5 times [2022-01-31 17:12:48,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:48,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958831766] [2022-01-31 17:12:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:48,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:48,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:48,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:48,724 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:48,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:48,815 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 17:12:48,816 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:48,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958831766] [2022-01-31 17:12:48,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958831766] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:48,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:48,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:12:48,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849700697] [2022-01-31 17:12:48,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:48,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:12:48,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:48,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:12:48,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:12:48,818 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:48,937 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-01-31 17:12:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:12:48,938 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 17:12:48,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:48,939 INFO L225 Difference]: With dead ends: 78 [2022-01-31 17:12:48,939 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 17:12:48,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:12:48,941 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:48,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 46 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 17:12:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-01-31 17:12:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-01-31 17:12:48,948 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 41 [2022-01-31 17:12:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:48,948 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-01-31 17:12:48,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-01-31 17:12:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 17:12:48,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:48,949 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:48,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:12:48,949 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:48,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:48,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1420928835, now seen corresponding path program 6 times [2022-01-31 17:12:48,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:48,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017409143] [2022-01-31 17:12:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:48,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:48,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:48,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:48,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:49,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:49,045 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 17:12:49,045 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:49,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017409143] [2022-01-31 17:12:49,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1017409143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:49,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:49,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:12:49,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192871305] [2022-01-31 17:12:49,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:49,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:12:49,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:49,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:12:49,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:12:49,046 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:49,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:49,165 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2022-01-31 17:12:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:12:49,165 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 17:12:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:49,166 INFO L225 Difference]: With dead ends: 80 [2022-01-31 17:12:49,166 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 17:12:49,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:12:49,167 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:49,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 46 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 17:12:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-01-31 17:12:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-01-31 17:12:49,171 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 43 [2022-01-31 17:12:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:49,172 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-01-31 17:12:49,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-01-31 17:12:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 17:12:49,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:49,173 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:49,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:12:49,173 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:49,173 INFO L85 PathProgramCache]: Analyzing trace with hash 675917665, now seen corresponding path program 7 times [2022-01-31 17:12:49,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:49,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437026513] [2022-01-31 17:12:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:49,175 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:49,175 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:49,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:49,176 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:49,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:49,245 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:49,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437026513] [2022-01-31 17:12:49,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [437026513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:49,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:49,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:12:49,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569493461] [2022-01-31 17:12:49,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:49,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:12:49,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:49,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:12:49,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:12:49,246 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:49,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:49,347 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2022-01-31 17:12:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:12:49,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 17:12:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:49,348 INFO L225 Difference]: With dead ends: 82 [2022-01-31 17:12:49,348 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 17:12:49,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:12:49,349 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:49,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 46 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:12:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 17:12:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-01-31 17:12:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-01-31 17:12:49,354 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 45 [2022-01-31 17:12:49,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:49,354 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-01-31 17:12:49,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-01-31 17:12:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:12:49,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:49,355 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:49,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:12:49,355 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:49,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1979721727, now seen corresponding path program 8 times [2022-01-31 17:12:49,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:49,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885930600] [2022-01-31 17:12:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:49,357 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:49,357 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:49,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:49,358 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:49,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:49,437 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 17:12:49,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885930600] [2022-01-31 17:12:49,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [885930600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:49,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:49,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:12:49,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788315230] [2022-01-31 17:12:49,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:49,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:12:49,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:49,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:12:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:12:49,438 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:49,559 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2022-01-31 17:12:49,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:12:49,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 17:12:49,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:49,560 INFO L225 Difference]: With dead ends: 84 [2022-01-31 17:12:49,560 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 17:12:49,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:12:49,561 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:49,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 46 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 17:12:49,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-01-31 17:12:49,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-01-31 17:12:49,566 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 47 [2022-01-31 17:12:49,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:49,566 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-01-31 17:12:49,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:49,566 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-01-31 17:12:49,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 17:12:49,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:49,567 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:49,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:12:49,567 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:49,567 INFO L85 PathProgramCache]: Analyzing trace with hash 804974877, now seen corresponding path program 9 times [2022-01-31 17:12:49,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:49,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125085295] [2022-01-31 17:12:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:49,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:49,569 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:49,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:49,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:49,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:49,669 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 17:12:49,669 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:49,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125085295] [2022-01-31 17:12:49,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [125085295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:49,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:49,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:12:49,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606486612] [2022-01-31 17:12:49,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:49,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:12:49,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:49,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:12:49,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:12:49,670 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:49,813 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2022-01-31 17:12:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:12:49,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 17:12:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:49,814 INFO L225 Difference]: With dead ends: 86 [2022-01-31 17:12:49,814 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 17:12:49,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:12:49,815 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:49,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:49,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 17:12:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-01-31 17:12:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-01-31 17:12:49,820 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2022-01-31 17:12:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:49,820 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-01-31 17:12:49,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-01-31 17:12:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:12:49,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:49,821 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:49,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:12:49,821 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:49,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1449650875, now seen corresponding path program 10 times [2022-01-31 17:12:49,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:49,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652467833] [2022-01-31 17:12:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:49,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:49,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:49,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:49,824 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:49,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:49,925 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 17:12:49,925 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:49,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652467833] [2022-01-31 17:12:49,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [652467833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:49,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:49,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:12:49,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833536644] [2022-01-31 17:12:49,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:49,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:12:49,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:49,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:12:49,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:12:49,926 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:50,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:50,071 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-01-31 17:12:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:12:50,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 17:12:50,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:50,072 INFO L225 Difference]: With dead ends: 88 [2022-01-31 17:12:50,072 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 17:12:50,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:12:50,073 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 47 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:50,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 51 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 17:12:50,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-01-31 17:12:50,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:50,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-01-31 17:12:50,078 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 51 [2022-01-31 17:12:50,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:50,078 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-01-31 17:12:50,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:50,078 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-01-31 17:12:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:12:50,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:50,079 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:50,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:12:50,079 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1786972967, now seen corresponding path program 11 times [2022-01-31 17:12:50,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:50,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476075539] [2022-01-31 17:12:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:50,081 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:50,081 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:50,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:50,082 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:50,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:50,181 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 17:12:50,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:50,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476075539] [2022-01-31 17:12:50,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1476075539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:50,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:50,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:12:50,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821479060] [2022-01-31 17:12:50,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:50,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:12:50,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:50,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:12:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:12:50,182 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:50,339 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2022-01-31 17:12:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:12:50,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 17:12:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:50,341 INFO L225 Difference]: With dead ends: 90 [2022-01-31 17:12:50,341 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 17:12:50,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:12:50,344 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:50,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 46 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 17:12:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-01-31 17:12:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 54 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-01-31 17:12:50,356 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 53 [2022-01-31 17:12:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:50,357 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-01-31 17:12:50,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-01-31 17:12:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:12:50,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:50,357 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:50,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:12:50,357 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:50,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1668804471, now seen corresponding path program 12 times [2022-01-31 17:12:50,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:50,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490960685] [2022-01-31 17:12:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:50,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:50,359 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:50,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:50,360 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:50,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:50,466 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 17:12:50,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:50,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490960685] [2022-01-31 17:12:50,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [490960685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:50,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:50,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:12:50,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076620388] [2022-01-31 17:12:50,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:50,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:12:50,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:50,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:12:50,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:12:50,468 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:50,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:50,659 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-01-31 17:12:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:12:50,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 17:12:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:50,661 INFO L225 Difference]: With dead ends: 92 [2022-01-31 17:12:50,661 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 17:12:50,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:12:50,664 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 51 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:50,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 51 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:50,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 17:12:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-01-31 17:12:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-01-31 17:12:50,670 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 55 [2022-01-31 17:12:50,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:50,670 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-01-31 17:12:50,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-01-31 17:12:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 17:12:50,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:50,671 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:50,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:12:50,671 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:50,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1633764715, now seen corresponding path program 13 times [2022-01-31 17:12:50,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:50,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543415622] [2022-01-31 17:12:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:50,673 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:50,673 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:50,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:50,675 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:50,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:50,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:50,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543415622] [2022-01-31 17:12:50,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [543415622] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:50,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:50,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:12:50,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701037911] [2022-01-31 17:12:50,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:50,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:12:50,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:50,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:12:50,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:12:50,834 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:51,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:51,017 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2022-01-31 17:12:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:12:51,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 17:12:51,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:51,018 INFO L225 Difference]: With dead ends: 94 [2022-01-31 17:12:51,018 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 17:12:51,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:12:51,019 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:51,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 46 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 17:12:51,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-01-31 17:12:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-01-31 17:12:51,026 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 57 [2022-01-31 17:12:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:51,026 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-01-31 17:12:51,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-01-31 17:12:51,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:12:51,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:51,026 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:51,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:12:51,027 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:51,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1421920717, now seen corresponding path program 14 times [2022-01-31 17:12:51,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:51,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268432180] [2022-01-31 17:12:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:51,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:51,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:51,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:51,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:51,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:51,217 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:51,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268432180] [2022-01-31 17:12:51,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1268432180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:51,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:51,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:12:51,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500884067] [2022-01-31 17:12:51,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:51,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:12:51,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:51,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:12:51,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:12:51,218 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:51,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:51,417 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-01-31 17:12:51,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:12:51,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 17:12:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:51,418 INFO L225 Difference]: With dead ends: 96 [2022-01-31 17:12:51,418 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 17:12:51,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:12:51,418 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:51,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 46 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:51,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 17:12:51,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-01-31 17:12:51,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-01-31 17:12:51,424 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2022-01-31 17:12:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:51,424 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-01-31 17:12:51,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-01-31 17:12:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 17:12:51,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:51,424 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:51,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:12:51,424 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:51,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:51,425 INFO L85 PathProgramCache]: Analyzing trace with hash 296698449, now seen corresponding path program 15 times [2022-01-31 17:12:51,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:51,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988016790] [2022-01-31 17:12:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:51,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:51,426 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:51,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:51,428 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:51,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:51,571 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 17:12:51,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:51,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988016790] [2022-01-31 17:12:51,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988016790] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:51,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:51,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:12:51,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145636611] [2022-01-31 17:12:51,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:51,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:12:51,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:51,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:12:51,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:12:51,572 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:51,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:51,789 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2022-01-31 17:12:51,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:12:51,789 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 17:12:51,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:51,790 INFO L225 Difference]: With dead ends: 98 [2022-01-31 17:12:51,790 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 17:12:51,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:12:51,792 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:51,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 46 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 17:12:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-01-31 17:12:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-01-31 17:12:51,799 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 61 [2022-01-31 17:12:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:51,799 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-01-31 17:12:51,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-01-31 17:12:51,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:12:51,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:51,800 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:51,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:12:51,801 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:51,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1672691985, now seen corresponding path program 16 times [2022-01-31 17:12:51,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:51,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038996918] [2022-01-31 17:12:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:51,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:51,805 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:51,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:51,807 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:51,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:51,981 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:51,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038996918] [2022-01-31 17:12:51,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2038996918] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:51,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:51,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:12:51,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123685738] [2022-01-31 17:12:51,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:51,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:12:51,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:51,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:12:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:12:51,982 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:52,202 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2022-01-31 17:12:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:12:52,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 17:12:52,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:52,203 INFO L225 Difference]: With dead ends: 100 [2022-01-31 17:12:52,203 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 17:12:52,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:12:52,204 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:52,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 41 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:52,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 17:12:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-01-31 17:12:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.078125) internal successors, (69), 64 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-01-31 17:12:52,210 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 63 [2022-01-31 17:12:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:52,210 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-01-31 17:12:52,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-01-31 17:12:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 17:12:52,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:52,235 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:52,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:12:52,236 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:52,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:52,236 INFO L85 PathProgramCache]: Analyzing trace with hash -176321523, now seen corresponding path program 17 times [2022-01-31 17:12:52,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:52,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743817857] [2022-01-31 17:12:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:52,238 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:52,238 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:52,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:52,239 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:52,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:52,441 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 17:12:52,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:52,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743817857] [2022-01-31 17:12:52,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [743817857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:52,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:52,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:12:52,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550521796] [2022-01-31 17:12:52,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:52,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:12:52,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:52,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:12:52,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:12:52,443 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:52,703 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2022-01-31 17:12:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:12:52,704 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 17:12:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:52,704 INFO L225 Difference]: With dead ends: 102 [2022-01-31 17:12:52,704 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 17:12:52,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:12:52,705 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 61 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:52,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 46 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:52,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 17:12:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-01-31 17:12:52,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:52,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-01-31 17:12:52,711 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 65 [2022-01-31 17:12:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:52,711 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-01-31 17:12:52,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-01-31 17:12:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:12:52,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:52,712 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:52,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:12:52,712 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash -978351701, now seen corresponding path program 18 times [2022-01-31 17:12:52,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:52,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628364372] [2022-01-31 17:12:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:52,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:52,714 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:52,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:52,715 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:52,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:52,891 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:52,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628364372] [2022-01-31 17:12:52,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628364372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:52,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:52,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:12:52,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789475700] [2022-01-31 17:12:52,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:52,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:12:52,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:12:52,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:12:52,892 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:53,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:53,181 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2022-01-31 17:12:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:12:53,182 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 17:12:53,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:53,183 INFO L225 Difference]: With dead ends: 104 [2022-01-31 17:12:53,183 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 17:12:53,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:12:53,184 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 63 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:53,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 61 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 17:12:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-01-31 17:12:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-01-31 17:12:53,189 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 67 [2022-01-31 17:12:53,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:53,190 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-01-31 17:12:53,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-01-31 17:12:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 17:12:53,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:53,190 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:53,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:12:53,190 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:53,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:53,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1364760521, now seen corresponding path program 19 times [2022-01-31 17:12:53,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:53,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384205279] [2022-01-31 17:12:53,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:53,192 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:53,192 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:53,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:53,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:53,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:53,378 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:53,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384205279] [2022-01-31 17:12:53,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384205279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:53,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:53,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:12:53,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687017262] [2022-01-31 17:12:53,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:53,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:12:53,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:53,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:12:53,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:12:53,379 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:53,635 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2022-01-31 17:12:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:12:53,636 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 17:12:53,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:53,636 INFO L225 Difference]: With dead ends: 106 [2022-01-31 17:12:53,655 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 17:12:53,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:12:53,655 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:53,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 46 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:53,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 17:12:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-01-31 17:12:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-01-31 17:12:53,661 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2022-01-31 17:12:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:53,661 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-01-31 17:12:53,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-01-31 17:12:53,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:12:53,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:53,662 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:53,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:12:53,662 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:53,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:53,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1762224537, now seen corresponding path program 20 times [2022-01-31 17:12:53,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:53,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454641878] [2022-01-31 17:12:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:53,664 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:53,664 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:53,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:53,665 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:53,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:53,867 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:53,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454641878] [2022-01-31 17:12:53,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [454641878] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:53,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:53,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:12:53,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839244942] [2022-01-31 17:12:53,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:53,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:12:53,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:53,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:12:53,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:12:53,868 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:54,171 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2022-01-31 17:12:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:12:54,171 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 17:12:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:54,171 INFO L225 Difference]: With dead ends: 108 [2022-01-31 17:12:54,172 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 17:12:54,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:12:54,173 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:54,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 51 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:54,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 17:12:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-01-31 17:12:54,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:54,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-01-31 17:12:54,178 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 71 [2022-01-31 17:12:54,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:54,178 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-01-31 17:12:54,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:54,179 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-01-31 17:12:54,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:12:54,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:54,179 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:54,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:12:54,179 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:54,179 INFO L85 PathProgramCache]: Analyzing trace with hash -317758075, now seen corresponding path program 21 times [2022-01-31 17:12:54,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:54,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154028313] [2022-01-31 17:12:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:54,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:54,181 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:54,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:54,182 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:54,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:54,415 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 17:12:54,415 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:54,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154028313] [2022-01-31 17:12:54,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154028313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:54,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:54,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:12:54,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179321927] [2022-01-31 17:12:54,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:54,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:12:54,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:12:54,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:12:54,417 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:54,745 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2022-01-31 17:12:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:12:54,745 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 17:12:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:54,746 INFO L225 Difference]: With dead ends: 110 [2022-01-31 17:12:54,746 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 17:12:54,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:12:54,747 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 69 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:54,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 46 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:54,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 17:12:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-01-31 17:12:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-01-31 17:12:54,753 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 73 [2022-01-31 17:12:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:54,753 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-01-31 17:12:54,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:54,753 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-01-31 17:12:54,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:12:54,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:54,754 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:54,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:12:54,754 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:54,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:54,754 INFO L85 PathProgramCache]: Analyzing trace with hash 540075299, now seen corresponding path program 22 times [2022-01-31 17:12:54,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:54,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576370912] [2022-01-31 17:12:54,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:54,756 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:54,756 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:54,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:54,757 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:55,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:55,029 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 17:12:55,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:55,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576370912] [2022-01-31 17:12:55,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [576370912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:55,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:55,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:12:55,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539090118] [2022-01-31 17:12:55,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:55,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:12:55,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:55,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:12:55,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:12:55,032 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:55,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:55,368 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2022-01-31 17:12:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:12:55,369 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 17:12:55,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:55,369 INFO L225 Difference]: With dead ends: 112 [2022-01-31 17:12:55,369 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 17:12:55,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:12:55,370 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:55,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 46 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 17:12:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-01-31 17:12:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-01-31 17:12:55,381 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 75 [2022-01-31 17:12:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:55,381 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-01-31 17:12:55,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:55,382 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-01-31 17:12:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 17:12:55,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:55,382 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:55,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:12:55,382 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:55,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:55,382 INFO L85 PathProgramCache]: Analyzing trace with hash 284226881, now seen corresponding path program 23 times [2022-01-31 17:12:55,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:55,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344638507] [2022-01-31 17:12:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:55,384 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:55,384 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:55,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:55,386 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:55,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:55,653 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 17:12:55,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:55,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344638507] [2022-01-31 17:12:55,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344638507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:55,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:55,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:12:55,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027457949] [2022-01-31 17:12:55,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:55,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:12:55,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:12:55,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:12:55,654 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:56,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:56,034 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2022-01-31 17:12:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:12:56,034 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 17:12:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:56,035 INFO L225 Difference]: With dead ends: 114 [2022-01-31 17:12:56,035 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 17:12:56,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:12:56,036 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 73 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:56,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 46 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:56,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 17:12:56,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-01-31 17:12:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.064102564102564) internal successors, (83), 78 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-01-31 17:12:56,042 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 77 [2022-01-31 17:12:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:56,043 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-01-31 17:12:56,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:56,043 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-01-31 17:12:56,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 17:12:56,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:56,043 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:56,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:12:56,043 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:56,044 INFO L85 PathProgramCache]: Analyzing trace with hash -772966945, now seen corresponding path program 24 times [2022-01-31 17:12:56,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:56,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014228059] [2022-01-31 17:12:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:56,045 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:56,045 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:56,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:56,046 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:56,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:56,332 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 17:12:56,332 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:56,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014228059] [2022-01-31 17:12:56,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2014228059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:56,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:56,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:12:56,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983838021] [2022-01-31 17:12:56,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:56,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:12:56,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:56,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:12:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:12:56,333 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:56,692 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2022-01-31 17:12:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:12:56,693 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 17:12:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:56,693 INFO L225 Difference]: With dead ends: 116 [2022-01-31 17:12:56,693 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 17:12:56,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:12:56,694 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:56,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 41 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 17:12:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-01-31 17:12:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.0625) internal successors, (85), 80 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-01-31 17:12:56,701 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 79 [2022-01-31 17:12:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:56,701 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-01-31 17:12:56,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-01-31 17:12:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 17:12:56,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:56,701 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:56,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:12:56,701 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:56,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:56,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1171015421, now seen corresponding path program 25 times [2022-01-31 17:12:56,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:56,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572368878] [2022-01-31 17:12:56,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:56,703 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:56,703 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:56,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:56,705 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:56,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:56,984 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 17:12:56,984 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572368878] [2022-01-31 17:12:56,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [572368878] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:56,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:56,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:12:56,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178295204] [2022-01-31 17:12:56,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:56,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:12:56,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:12:56,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:12:56,985 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:57,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:57,379 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2022-01-31 17:12:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:12:57,379 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 17:12:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:57,379 INFO L225 Difference]: With dead ends: 118 [2022-01-31 17:12:57,379 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 17:12:57,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:12:57,381 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:57,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 46 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 17:12:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-01-31 17:12:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 82 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-01-31 17:12:57,387 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 81 [2022-01-31 17:12:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:57,388 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-01-31 17:12:57,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-01-31 17:12:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:12:57,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:57,388 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:57,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:12:57,388 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:57,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1027295387, now seen corresponding path program 26 times [2022-01-31 17:12:57,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:57,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909446228] [2022-01-31 17:12:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:57,390 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:57,390 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:57,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:57,392 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:57,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:57,669 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 17:12:57,669 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:57,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909446228] [2022-01-31 17:12:57,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [909446228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:57,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:57,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:12:57,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676775713] [2022-01-31 17:12:57,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:57,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:12:57,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:57,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:12:57,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:12:57,670 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:58,106 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2022-01-31 17:12:58,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:12:58,106 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 17:12:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:58,107 INFO L225 Difference]: With dead ends: 120 [2022-01-31 17:12:58,107 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 17:12:58,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:12:58,108 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 79 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:58,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 51 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 17:12:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-01-31 17:12:58,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-01-31 17:12:58,117 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 83 [2022-01-31 17:12:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:58,117 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-01-31 17:12:58,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:58,118 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-01-31 17:12:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 17:12:58,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:58,118 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:58,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:12:58,118 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:58,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:58,119 INFO L85 PathProgramCache]: Analyzing trace with hash 351296185, now seen corresponding path program 27 times [2022-01-31 17:12:58,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:58,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542380151] [2022-01-31 17:12:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:58,120 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:58,120 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:58,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:58,122 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:58,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:58,422 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 17:12:58,422 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:58,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542380151] [2022-01-31 17:12:58,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1542380151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:58,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:58,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:12:58,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88723018] [2022-01-31 17:12:58,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:58,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:12:58,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:58,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:12:58,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:12:58,423 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:58,879 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2022-01-31 17:12:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:12:58,879 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-01-31 17:12:58,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:58,880 INFO L225 Difference]: With dead ends: 122 [2022-01-31 17:12:58,880 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 17:12:58,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:12:58,881 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 81 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:58,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 51 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:58,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 17:12:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-01-31 17:12:58,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.058139534883721) internal successors, (91), 86 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:58,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-01-31 17:12:58,889 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 85 [2022-01-31 17:12:58,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:58,889 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-01-31 17:12:58,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:58,889 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-01-31 17:12:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:12:58,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:58,889 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:58,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:12:58,889 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:58,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash -743875241, now seen corresponding path program 28 times [2022-01-31 17:12:58,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:58,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857893111] [2022-01-31 17:12:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:58,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:58,891 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:58,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:58,893 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:59,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:59,218 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 17:12:59,218 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:59,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857893111] [2022-01-31 17:12:59,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857893111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:59,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:59,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:12:59,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916486031] [2022-01-31 17:12:59,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:59,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:12:59,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:59,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:12:59,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:12:59,219 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:59,701 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2022-01-31 17:12:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:12:59,702 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 17:12:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:59,702 INFO L225 Difference]: With dead ends: 124 [2022-01-31 17:12:59,702 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 17:12:59,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:12:59,704 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:59,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 61 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:12:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 17:12:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-01-31 17:12:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 88 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-01-31 17:12:59,713 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 87 [2022-01-31 17:12:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:59,714 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-01-31 17:12:59,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-01-31 17:12:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 17:12:59,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:59,714 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:59,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:12:59,714 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:59,715 INFO L85 PathProgramCache]: Analyzing trace with hash -936628107, now seen corresponding path program 29 times [2022-01-31 17:12:59,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:59,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937931328] [2022-01-31 17:12:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:59,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:59,716 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:59,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:59,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:00,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:00,074 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 17:13:00,074 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937931328] [2022-01-31 17:13:00,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937931328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:00,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:00,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:13:00,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055612705] [2022-01-31 17:13:00,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:00,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:13:00,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:00,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:13:00,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:13:00,075 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:00,545 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2022-01-31 17:13:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:13:00,545 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 17:13:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:00,546 INFO L225 Difference]: With dead ends: 126 [2022-01-31 17:13:00,546 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 17:13:00,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:13:00,548 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:00,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 66 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:00,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 17:13:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-01-31 17:13:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-01-31 17:13:00,556 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 89 [2022-01-31 17:13:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:00,556 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-01-31 17:13:00,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-01-31 17:13:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:13:00,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:00,557 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:00,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:13:00,557 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:00,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1488538605, now seen corresponding path program 30 times [2022-01-31 17:13:00,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:00,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894404046] [2022-01-31 17:13:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:00,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:00,559 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:00,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:00,561 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:00,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:00,912 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 17:13:00,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:00,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894404046] [2022-01-31 17:13:00,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894404046] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:00,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:00,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:13:00,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143665057] [2022-01-31 17:13:00,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:00,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:13:00,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:00,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:13:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:13:00,914 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:01,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:01,424 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2022-01-31 17:13:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:13:01,424 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 17:13:01,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:01,425 INFO L225 Difference]: With dead ends: 128 [2022-01-31 17:13:01,425 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 17:13:01,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:13:01,426 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 87 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:01,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 56 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 17:13:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-01-31 17:13:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 92 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-01-31 17:13:01,435 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 91 [2022-01-31 17:13:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:01,435 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-01-31 17:13:01,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-01-31 17:13:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 17:13:01,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:01,436 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:01,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:13:01,436 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:01,436 INFO L85 PathProgramCache]: Analyzing trace with hash 701417521, now seen corresponding path program 31 times [2022-01-31 17:13:01,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:01,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230384869] [2022-01-31 17:13:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:01,438 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:01,438 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:01,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:01,440 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:01,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:01,863 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:01,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230384869] [2022-01-31 17:13:01,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [230384869] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:01,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:01,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:13:01,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247186310] [2022-01-31 17:13:01,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:01,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:13:01,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:01,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:13:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:13:01,866 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:02,381 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2022-01-31 17:13:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:13:02,381 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-01-31 17:13:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:02,382 INFO L225 Difference]: With dead ends: 130 [2022-01-31 17:13:02,382 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 17:13:02,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:13:02,383 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 89 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:02,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 46 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 17:13:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-01-31 17:13:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2022-01-31 17:13:02,392 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 93 [2022-01-31 17:13:02,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:02,392 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2022-01-31 17:13:02,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2022-01-31 17:13:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:13:02,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:02,393 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:02,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:13:02,393 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:02,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:02,393 INFO L85 PathProgramCache]: Analyzing trace with hash 715279567, now seen corresponding path program 32 times [2022-01-31 17:13:02,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:02,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217149682] [2022-01-31 17:13:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:02,395 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:02,395 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:02,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:02,397 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:02,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:02,849 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 17:13:02,850 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:02,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217149682] [2022-01-31 17:13:02,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [217149682] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:02,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:02,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:13:02,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70920399] [2022-01-31 17:13:02,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:02,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:13:02,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:02,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:13:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:13:02,851 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:03,417 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2022-01-31 17:13:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:13:03,417 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 17:13:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:03,418 INFO L225 Difference]: With dead ends: 132 [2022-01-31 17:13:03,418 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 17:13:03,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:13:03,419 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 91 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:03,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 61 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 17:13:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-01-31 17:13:03,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 96 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-01-31 17:13:03,428 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 95 [2022-01-31 17:13:03,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:03,429 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-01-31 17:13:03,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-01-31 17:13:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 17:13:03,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:03,429 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:03,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:13:03,429 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:03,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1151803885, now seen corresponding path program 33 times [2022-01-31 17:13:03,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:03,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89858526] [2022-01-31 17:13:03,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:03,431 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:03,431 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:03,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:03,433 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:03,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:03,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:03,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89858526] [2022-01-31 17:13:03,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [89858526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:03,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:03,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:13:03,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953359463] [2022-01-31 17:13:03,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:03,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:13:03,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:03,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:13:03,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:13:03,860 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:04,450 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2022-01-31 17:13:04,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:13:04,450 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-01-31 17:13:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:04,451 INFO L225 Difference]: With dead ends: 134 [2022-01-31 17:13:04,451 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 17:13:04,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:13:04,452 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 93 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:04,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 46 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 17:13:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-01-31 17:13:04,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 98 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-01-31 17:13:04,464 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 97 [2022-01-31 17:13:04,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:04,464 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-01-31 17:13:04,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:04,464 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-01-31 17:13:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:13:04,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:04,465 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:04,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:13:04,465 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:04,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:04,465 INFO L85 PathProgramCache]: Analyzing trace with hash -255121525, now seen corresponding path program 34 times [2022-01-31 17:13:04,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:04,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867702541] [2022-01-31 17:13:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:04,467 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:04,467 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:04,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:04,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:04,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:04,907 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:04,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867702541] [2022-01-31 17:13:04,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [867702541] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:04,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:04,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:13:04,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864827504] [2022-01-31 17:13:04,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:04,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:13:04,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:13:04,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:13:04,909 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:05,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:05,516 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2022-01-31 17:13:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:13:05,516 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 17:13:05,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:05,517 INFO L225 Difference]: With dead ends: 136 [2022-01-31 17:13:05,517 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 17:13:05,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:13:05,518 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 95 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:05,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 61 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 17:13:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-01-31 17:13:05,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.05) internal successors, (105), 100 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-01-31 17:13:05,528 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 99 [2022-01-31 17:13:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:05,528 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-01-31 17:13:05,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-01-31 17:13:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 17:13:05,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:05,529 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:05,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:13:05,529 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:05,529 INFO L85 PathProgramCache]: Analyzing trace with hash 604257705, now seen corresponding path program 35 times [2022-01-31 17:13:05,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:05,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944677230] [2022-01-31 17:13:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:05,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:05,531 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:05,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:05,533 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:06,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:06,024 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:06,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944677230] [2022-01-31 17:13:06,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1944677230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:06,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:06,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:13:06,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882957958] [2022-01-31 17:13:06,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:06,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:13:06,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:06,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:13:06,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:13:06,025 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:06,638 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2022-01-31 17:13:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:13:06,639 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 17:13:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:06,639 INFO L225 Difference]: With dead ends: 138 [2022-01-31 17:13:06,639 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 17:13:06,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:13:06,641 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 97 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:06,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 46 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:06,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 17:13:06,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-01-31 17:13:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-01-31 17:13:06,651 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 101 [2022-01-31 17:13:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:06,651 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-01-31 17:13:06,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:06,651 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-01-31 17:13:06,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 17:13:06,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:06,652 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:06,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:13:06,652 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:06,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:06,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1833976903, now seen corresponding path program 36 times [2022-01-31 17:13:06,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:06,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475115202] [2022-01-31 17:13:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:06,654 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:06,654 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:06,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:06,656 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:07,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:07,172 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 17:13:07,172 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:07,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475115202] [2022-01-31 17:13:07,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [475115202] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:07,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:07,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:13:07,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123947267] [2022-01-31 17:13:07,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:07,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:13:07,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:07,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:13:07,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:13:07,173 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:07,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:07,887 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2022-01-31 17:13:07,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:13:07,887 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 17:13:07,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:07,888 INFO L225 Difference]: With dead ends: 140 [2022-01-31 17:13:07,888 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 17:13:07,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:13:07,888 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 99 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:07,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 56 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:13:07,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 17:13:07,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-01-31 17:13:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-01-31 17:13:07,900 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 103 [2022-01-31 17:13:07,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:07,900 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-01-31 17:13:07,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-01-31 17:13:07,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 17:13:07,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:07,901 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:07,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:13:07,901 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:07,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:07,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1816847515, now seen corresponding path program 37 times [2022-01-31 17:13:07,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:07,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026023705] [2022-01-31 17:13:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:07,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:07,904 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:07,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:07,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:08,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:08,428 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 17:13:08,428 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:08,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026023705] [2022-01-31 17:13:08,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1026023705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:08,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:08,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:13:08,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730909938] [2022-01-31 17:13:08,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:08,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:13:08,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:08,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:13:08,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:13:08,429 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:09,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:09,112 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2022-01-31 17:13:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:13:09,112 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 17:13:09,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:09,113 INFO L225 Difference]: With dead ends: 142 [2022-01-31 17:13:09,113 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 17:13:09,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:13:09,114 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 101 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:09,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 61 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:09,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 17:13:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-01-31 17:13:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2022-01-31 17:13:09,125 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 105 [2022-01-31 17:13:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:09,126 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2022-01-31 17:13:09,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2022-01-31 17:13:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:13:09,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:09,126 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:09,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:13:09,126 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1270832381, now seen corresponding path program 38 times [2022-01-31 17:13:09,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:09,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354492172] [2022-01-31 17:13:09,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:09,128 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:09,128 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:09,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:09,130 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:09,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:09,692 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 17:13:09,692 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:09,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354492172] [2022-01-31 17:13:09,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [354492172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:09,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:09,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:13:09,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396354846] [2022-01-31 17:13:09,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:09,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:13:09,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:09,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:13:09,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:13:09,693 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:10,393 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2022-01-31 17:13:10,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:13:10,394 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 17:13:10,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:10,394 INFO L225 Difference]: With dead ends: 144 [2022-01-31 17:13:10,394 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 17:13:10,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:13:10,396 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 103 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:10,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 51 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:10,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 17:13:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-01-31 17:13:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 108 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2022-01-31 17:13:10,410 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 107 [2022-01-31 17:13:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:10,410 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2022-01-31 17:13:10,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2022-01-31 17:13:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 17:13:10,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:10,410 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:10,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:13:10,411 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:10,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:10,411 INFO L85 PathProgramCache]: Analyzing trace with hash -536298719, now seen corresponding path program 39 times [2022-01-31 17:13:10,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:10,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836055170] [2022-01-31 17:13:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:10,413 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:10,413 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:10,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:10,416 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:10,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:10,973 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 17:13:10,973 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:10,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836055170] [2022-01-31 17:13:10,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [836055170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:10,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:10,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:13:10,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873923025] [2022-01-31 17:13:10,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:10,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:13:10,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:10,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:13:10,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:13:10,974 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:11,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:11,680 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2022-01-31 17:13:11,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:13:11,680 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-01-31 17:13:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:11,681 INFO L225 Difference]: With dead ends: 146 [2022-01-31 17:13:11,681 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 17:13:11,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:13:11,682 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 105 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:11,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 46 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:11,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 17:13:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-01-31 17:13:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 110 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-01-31 17:13:11,695 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 109 [2022-01-31 17:13:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:11,695 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-01-31 17:13:11,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-01-31 17:13:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:13:11,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:11,696 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:11,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:13:11,696 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:11,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash 975913919, now seen corresponding path program 40 times [2022-01-31 17:13:11,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:11,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215003838] [2022-01-31 17:13:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:11,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:11,698 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:11,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:11,700 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:12,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:12,259 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 17:13:12,259 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215003838] [2022-01-31 17:13:12,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1215003838] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:12,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:12,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:13:12,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900305807] [2022-01-31 17:13:12,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:12,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:13:12,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:12,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:13:12,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:13:12,261 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:13,024 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2022-01-31 17:13:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:13:13,025 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 17:13:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:13,025 INFO L225 Difference]: With dead ends: 148 [2022-01-31 17:13:13,025 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 17:13:13,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:13:13,026 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 107 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:13,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 61 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:13,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 17:13:13,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-01-31 17:13:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.0446428571428572) internal successors, (117), 112 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2022-01-31 17:13:13,039 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 111 [2022-01-31 17:13:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:13,039 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2022-01-31 17:13:13,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 43 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2022-01-31 17:13:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 17:13:13,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:13,040 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:13,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:13:13,040 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:13,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:13,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1781654307, now seen corresponding path program 41 times [2022-01-31 17:13:13,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:13,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505962975] [2022-01-31 17:13:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:13,042 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:13,042 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:13,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:13,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:13,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:13,648 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 17:13:13,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:13,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505962975] [2022-01-31 17:13:13,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1505962975] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:13,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:13,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:13:13,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053726197] [2022-01-31 17:13:13,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:13,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:13:13,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:13:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:13:13,649 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:14,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:14,467 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2022-01-31 17:13:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:13:14,467 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 17:13:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:14,468 INFO L225 Difference]: With dead ends: 150 [2022-01-31 17:13:14,468 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 17:13:14,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:13:14,469 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 109 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:14,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 41 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 17:13:14,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-01-31 17:13:14,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.043859649122807) internal successors, (119), 114 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-01-31 17:13:14,482 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 113 [2022-01-31 17:13:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:14,482 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-01-31 17:13:14,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-01-31 17:13:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:13:14,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:14,483 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:14,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:13:14,483 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1809897861, now seen corresponding path program 42 times [2022-01-31 17:13:14,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:14,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028739764] [2022-01-31 17:13:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:14,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:14,486 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:14,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:14,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:15,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:15,131 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 17:13:15,131 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:15,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028739764] [2022-01-31 17:13:15,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2028739764] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:15,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:15,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:13:15,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233915952] [2022-01-31 17:13:15,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:15,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:13:15,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:15,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:13:15,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:13:15,133 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:16,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:16,008 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2022-01-31 17:13:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:13:16,009 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 17:13:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:16,009 INFO L225 Difference]: With dead ends: 152 [2022-01-31 17:13:16,009 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 17:13:16,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:13:16,010 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 111 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:16,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 56 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 17:13:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-01-31 17:13:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-01-31 17:13:16,031 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 115 [2022-01-31 17:13:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:16,031 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-01-31 17:13:16,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-01-31 17:13:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 17:13:16,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:16,032 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:16,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:13:16,032 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1112817817, now seen corresponding path program 43 times [2022-01-31 17:13:16,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:16,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282760070] [2022-01-31 17:13:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:16,035 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:16,035 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:16,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:16,038 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:16,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:16,725 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 17:13:16,725 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:16,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282760070] [2022-01-31 17:13:16,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [282760070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:16,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:16,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:13:16,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922949237] [2022-01-31 17:13:16,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:16,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:13:16,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:16,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:13:16,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:13:16,727 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:17,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:17,655 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2022-01-31 17:13:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:13:17,656 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-01-31 17:13:17,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:17,656 INFO L225 Difference]: With dead ends: 154 [2022-01-31 17:13:17,656 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 17:13:17,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:13:17,657 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 113 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:17,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 66 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:13:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 17:13:17,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-01-31 17:13:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2022-01-31 17:13:17,672 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 117 [2022-01-31 17:13:17,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:17,672 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2022-01-31 17:13:17,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 46 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:17,672 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2022-01-31 17:13:17,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 17:13:17,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:17,673 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:17,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:13:17,673 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:17,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash 933972791, now seen corresponding path program 44 times [2022-01-31 17:13:17,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:17,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44935363] [2022-01-31 17:13:17,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:17,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:17,675 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:17,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:17,678 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:18,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:18,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:18,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44935363] [2022-01-31 17:13:18,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [44935363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:18,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:18,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:13:18,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174161842] [2022-01-31 17:13:18,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:18,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:13:18,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:13:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:13:18,356 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:19,226 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2022-01-31 17:13:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:13:19,227 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 17:13:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:19,227 INFO L225 Difference]: With dead ends: 156 [2022-01-31 17:13:19,227 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 17:13:19,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:13:19,228 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:19,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 56 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 17:13:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-01-31 17:13:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.0416666666666667) internal successors, (125), 120 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-01-31 17:13:19,243 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 119 [2022-01-31 17:13:19,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:19,243 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-01-31 17:13:19,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-01-31 17:13:19,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 17:13:19,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:19,244 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:19,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:13:19,244 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash 862594645, now seen corresponding path program 45 times [2022-01-31 17:13:19,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:19,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431307380] [2022-01-31 17:13:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:19,246 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:19,246 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:19,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:19,248 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:19,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:19,970 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 17:13:19,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:19,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431307380] [2022-01-31 17:13:19,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1431307380] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:19,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:19,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:13:19,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618254058] [2022-01-31 17:13:19,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:19,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:13:19,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:19,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:13:19,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:13:19,972 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:20,873 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2022-01-31 17:13:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:13:20,873 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-01-31 17:13:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:20,874 INFO L225 Difference]: With dead ends: 158 [2022-01-31 17:13:20,874 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 17:13:20,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:13:20,875 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 117 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:20,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 51 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 17:13:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-01-31 17:13:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.040983606557377) internal successors, (127), 122 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2022-01-31 17:13:20,890 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 121 [2022-01-31 17:13:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:20,890 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2022-01-31 17:13:20,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 48 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2022-01-31 17:13:20,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:13:20,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:20,891 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:20,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:13:20,891 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash 987673075, now seen corresponding path program 46 times [2022-01-31 17:13:20,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:20,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844512456] [2022-01-31 17:13:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:20,893 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:20,893 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:20,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:20,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:21,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:21,625 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 17:13:21,625 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:21,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844512456] [2022-01-31 17:13:21,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [844512456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:21,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:21,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:13:21,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366111266] [2022-01-31 17:13:21,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:21,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:13:21,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:21,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:13:21,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:13:21,626 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:22,536 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2022-01-31 17:13:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:13:22,536 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 17:13:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:22,537 INFO L225 Difference]: With dead ends: 160 [2022-01-31 17:13:22,537 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 17:13:22,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:13:22,538 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 119 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:22,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 41 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 17:13:22,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-01-31 17:13:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.0403225806451613) internal successors, (129), 124 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-01-31 17:13:22,553 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 123 [2022-01-31 17:13:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:22,553 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-01-31 17:13:22,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-01-31 17:13:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 17:13:22,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:22,554 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:22,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:13:22,554 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:22,554 INFO L85 PathProgramCache]: Analyzing trace with hash 928960017, now seen corresponding path program 47 times [2022-01-31 17:13:22,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:22,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59903311] [2022-01-31 17:13:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:22,556 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:22,556 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:22,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:22,558 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:23,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:23,302 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 17:13:23,303 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:23,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59903311] [2022-01-31 17:13:23,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [59903311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:23,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:23,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:13:23,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025485869] [2022-01-31 17:13:23,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:23,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:13:23,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:23,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:13:23,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:13:23,304 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:24,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:24,301 INFO L93 Difference]: Finished difference Result 162 states and 170 transitions. [2022-01-31 17:13:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:13:24,302 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 17:13:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:24,303 INFO L225 Difference]: With dead ends: 162 [2022-01-31 17:13:24,303 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 17:13:24,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:13:24,304 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 121 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:24,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 46 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 17:13:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-01-31 17:13:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.0396825396825398) internal successors, (131), 126 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-01-31 17:13:24,323 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 125 [2022-01-31 17:13:24,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:24,323 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-01-31 17:13:24,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 50 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:24,324 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-01-31 17:13:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 17:13:24,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:24,324 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:24,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:13:24,324 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:24,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:24,324 INFO L85 PathProgramCache]: Analyzing trace with hash 340286127, now seen corresponding path program 48 times [2022-01-31 17:13:24,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:24,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367520805] [2022-01-31 17:13:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:24,327 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:24,327 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:24,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:24,329 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:25,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:25,119 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 17:13:25,120 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:25,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367520805] [2022-01-31 17:13:25,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [367520805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:25,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:25,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:13:25,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334642561] [2022-01-31 17:13:25,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:25,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:13:25,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:25,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:13:25,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:13:25,121 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 52 states, 52 states have (on average 2.25) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:26,130 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2022-01-31 17:13:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:13:26,130 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.25) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-01-31 17:13:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:26,131 INFO L225 Difference]: With dead ends: 164 [2022-01-31 17:13:26,131 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 17:13:26,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:13:26,133 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 123 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:26,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 56 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 17:13:26,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-01-31 17:13:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 128 states have (on average 1.0390625) internal successors, (133), 128 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2022-01-31 17:13:26,150 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 127 [2022-01-31 17:13:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:26,150 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2022-01-31 17:13:26,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.25) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2022-01-31 17:13:26,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 17:13:26,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:26,151 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:26,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:13:26,151 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:26,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:26,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1560360909, now seen corresponding path program 49 times [2022-01-31 17:13:26,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:26,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831480375] [2022-01-31 17:13:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:26,153 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:26,153 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:26,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:26,155 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:26,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:26,965 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 17:13:26,965 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:26,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831480375] [2022-01-31 17:13:26,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [831480375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:26,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:26,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:13:26,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435087092] [2022-01-31 17:13:26,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:26,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:13:26,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:26,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:13:26,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:13:26,967 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:28,001 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2022-01-31 17:13:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:13:28,001 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-01-31 17:13:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:28,002 INFO L225 Difference]: With dead ends: 166 [2022-01-31 17:13:28,002 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 17:13:28,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:13:28,003 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 125 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:28,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 46 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:28,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 17:13:28,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-01-31 17:13:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0384615384615385) internal successors, (135), 130 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2022-01-31 17:13:28,020 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 129 [2022-01-31 17:13:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:28,021 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2022-01-31 17:13:28,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 52 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2022-01-31 17:13:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:13:28,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:28,021 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:28,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:13:28,021 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:28,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1526154603, now seen corresponding path program 50 times [2022-01-31 17:13:28,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:28,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104379923] [2022-01-31 17:13:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:28,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:28,023 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:28,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:28,025 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:28,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:28,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:28,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104379923] [2022-01-31 17:13:28,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [104379923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:28,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:28,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:13:28,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940546326] [2022-01-31 17:13:28,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:28,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:13:28,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:28,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:13:28,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:13:28,861 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:29,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:29,926 INFO L93 Difference]: Finished difference Result 168 states and 176 transitions. [2022-01-31 17:13:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:13:29,926 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 17:13:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:29,927 INFO L225 Difference]: With dead ends: 168 [2022-01-31 17:13:29,927 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 17:13:29,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:13:29,929 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 127 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:29,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 51 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:29,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 17:13:29,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-01-31 17:13:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 132 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:29,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-01-31 17:13:29,948 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 131 [2022-01-31 17:13:29,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:29,948 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-01-31 17:13:29,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:29,948 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-01-31 17:13:29,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 17:13:29,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:29,949 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:29,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:13:29,949 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1281334391, now seen corresponding path program 51 times [2022-01-31 17:13:29,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:29,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823323872] [2022-01-31 17:13:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:29,950 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:29,950 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:29,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:29,953 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:30,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:30,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:30,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823323872] [2022-01-31 17:13:30,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823323872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:30,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:30,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:13:30,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115950077] [2022-01-31 17:13:30,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:30,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:13:30,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:13:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:13:30,912 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:32,073 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2022-01-31 17:13:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:13:32,073 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-01-31 17:13:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:32,074 INFO L225 Difference]: With dead ends: 170 [2022-01-31 17:13:32,074 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 17:13:32,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:13:32,074 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 129 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:32,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 51 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:13:32,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 17:13:32,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-01-31 17:13:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.037313432835821) internal successors, (139), 134 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2022-01-31 17:13:32,094 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 133 [2022-01-31 17:13:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:32,095 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2022-01-31 17:13:32,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 54 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2022-01-31 17:13:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:13:32,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:32,095 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:32,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:13:32,095 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2038795737, now seen corresponding path program 52 times [2022-01-31 17:13:32,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:32,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119213055] [2022-01-31 17:13:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:32,097 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:32,097 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:32,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:32,100 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:33,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:33,039 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 17:13:33,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119213055] [2022-01-31 17:13:33,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2119213055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:33,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:33,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:13:33,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901669695] [2022-01-31 17:13:33,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:33,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:13:33,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:33,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:13:33,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:13:33,041 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:34,224 INFO L93 Difference]: Finished difference Result 172 states and 180 transitions. [2022-01-31 17:13:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:13:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 17:13:34,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:34,225 INFO L225 Difference]: With dead ends: 172 [2022-01-31 17:13:34,225 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 17:13:34,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:13:34,226 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 131 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:34,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 61 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:13:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 17:13:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-01-31 17:13:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 136 states have (on average 1.036764705882353) internal successors, (141), 136 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2022-01-31 17:13:34,245 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 135 [2022-01-31 17:13:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:34,245 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2022-01-31 17:13:34,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 55 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2022-01-31 17:13:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 17:13:34,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:34,246 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:34,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:13:34,246 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:34,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:34,246 INFO L85 PathProgramCache]: Analyzing trace with hash 185291077, now seen corresponding path program 53 times [2022-01-31 17:13:34,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:34,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953422700] [2022-01-31 17:13:34,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:34,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:34,248 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:34,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:34,250 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:35,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:35,183 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 17:13:35,184 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:35,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953422700] [2022-01-31 17:13:35,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1953422700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:35,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:35,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:13:35,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465873610] [2022-01-31 17:13:35,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:35,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:13:35,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:35,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:13:35,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:13:35,185 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand has 57 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:36,399 INFO L93 Difference]: Finished difference Result 174 states and 182 transitions. [2022-01-31 17:13:36,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:13:36,400 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-01-31 17:13:36,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:36,400 INFO L225 Difference]: With dead ends: 174 [2022-01-31 17:13:36,400 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 17:13:36,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:13:36,402 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 133 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:36,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 51 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 17:13:36,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-01-31 17:13:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.036231884057971) internal successors, (143), 138 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:36,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2022-01-31 17:13:36,422 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 137 [2022-01-31 17:13:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:36,422 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2022-01-31 17:13:36,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 56 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:36,422 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2022-01-31 17:13:36,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 17:13:36,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:36,423 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:36,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:13:36,423 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:36,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:36,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1360994077, now seen corresponding path program 54 times [2022-01-31 17:13:36,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:36,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59484028] [2022-01-31 17:13:36,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:36,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:36,425 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:36,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:36,427 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:37,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:37,417 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 17:13:37,418 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:37,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59484028] [2022-01-31 17:13:37,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [59484028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:37,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:37,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:13:37,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99414903] [2022-01-31 17:13:37,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:37,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:13:37,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:37,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:13:37,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:13:37,419 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:38,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:38,663 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2022-01-31 17:13:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:13:38,664 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 17:13:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:38,665 INFO L225 Difference]: With dead ends: 176 [2022-01-31 17:13:38,665 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 17:13:38,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:13:38,666 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 135 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:38,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 46 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 17:13:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-01-31 17:13:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.0357142857142858) internal successors, (145), 140 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2022-01-31 17:13:38,686 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 139 [2022-01-31 17:13:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:38,686 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2022-01-31 17:13:38,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:38,687 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2022-01-31 17:13:38,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 17:13:38,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:38,687 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:38,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:13:38,687 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:38,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1282342655, now seen corresponding path program 55 times [2022-01-31 17:13:38,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:38,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853860035] [2022-01-31 17:13:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:38,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:38,690 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:38,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:38,693 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:39,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:39,689 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 17:13:39,689 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:39,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853860035] [2022-01-31 17:13:39,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1853860035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:39,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:39,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:13:39,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611764442] [2022-01-31 17:13:39,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:39,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:13:39,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:39,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:13:39,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:13:39,691 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:40,980 INFO L93 Difference]: Finished difference Result 178 states and 186 transitions. [2022-01-31 17:13:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:13:40,981 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 17:13:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:40,981 INFO L225 Difference]: With dead ends: 178 [2022-01-31 17:13:40,981 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 17:13:40,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:13:40,983 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 137 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:40,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 66 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:40,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 17:13:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-01-31 17:13:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.0352112676056338) internal successors, (147), 142 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2022-01-31 17:13:41,004 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 141 [2022-01-31 17:13:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:41,004 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2022-01-31 17:13:41,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 58 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2022-01-31 17:13:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 17:13:41,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:41,005 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:41,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:13:41,005 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:41,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:41,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1287229855, now seen corresponding path program 56 times [2022-01-31 17:13:41,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:41,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163997262] [2022-01-31 17:13:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:41,007 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:41,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:41,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:41,010 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:42,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:42,083 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:42,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163997262] [2022-01-31 17:13:42,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [163997262] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:42,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:42,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:13:42,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066890797] [2022-01-31 17:13:42,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:42,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:13:42,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:42,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:13:42,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:13:42,085 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 60 states, 60 states have (on average 2.216666666666667) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:43,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:43,557 INFO L93 Difference]: Finished difference Result 180 states and 188 transitions. [2022-01-31 17:13:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:13:43,558 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.216666666666667) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 17:13:43,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:43,558 INFO L225 Difference]: With dead ends: 180 [2022-01-31 17:13:43,558 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 17:13:43,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:13:43,560 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 139 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:43,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 66 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:13:43,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 17:13:43,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-01-31 17:13:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 144 states have (on average 1.0347222222222223) internal successors, (149), 144 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2022-01-31 17:13:43,598 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 143 [2022-01-31 17:13:43,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:43,598 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2022-01-31 17:13:43,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.216666666666667) internal successors, (133), 59 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:43,598 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2022-01-31 17:13:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 17:13:43,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:43,599 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:43,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:13:43,599 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:43,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1040216765, now seen corresponding path program 57 times [2022-01-31 17:13:43,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:43,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209816841] [2022-01-31 17:13:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:43,600 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:43,600 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:43,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:43,603 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:44,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:44,837 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 17:13:44,838 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:44,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209816841] [2022-01-31 17:13:44,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1209816841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:44,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:44,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:13:44,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681723071] [2022-01-31 17:13:44,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:44,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:13:44,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:44,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:13:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:13:44,840 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:46,168 INFO L93 Difference]: Finished difference Result 182 states and 190 transitions. [2022-01-31 17:13:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:13:46,169 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-01-31 17:13:46,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:46,169 INFO L225 Difference]: With dead ends: 182 [2022-01-31 17:13:46,169 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 17:13:46,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:13:46,170 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 141 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:46,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 46 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:46,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 17:13:46,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-01-31 17:13:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0342465753424657) internal successors, (151), 146 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:46,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-01-31 17:13:46,193 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 145 [2022-01-31 17:13:46,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:46,193 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-01-31 17:13:46,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 60 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:46,194 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-01-31 17:13:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:13:46,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:46,194 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:46,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:13:46,194 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:46,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:46,194 INFO L85 PathProgramCache]: Analyzing trace with hash -116161445, now seen corresponding path program 58 times [2022-01-31 17:13:46,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:46,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69073949] [2022-01-31 17:13:46,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:46,198 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:46,198 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:46,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:46,202 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:47,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:47,333 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 17:13:47,333 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:47,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69073949] [2022-01-31 17:13:47,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [69073949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:47,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:47,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:13:47,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632185261] [2022-01-31 17:13:47,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:47,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:13:47,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:47,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:13:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:13:47,335 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 62 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:48,750 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2022-01-31 17:13:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:13:48,750 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 17:13:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:48,751 INFO L225 Difference]: With dead ends: 184 [2022-01-31 17:13:48,751 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 17:13:48,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:13:48,752 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 143 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:48,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 51 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:13:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 17:13:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-01-31 17:13:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 148 states have (on average 1.0337837837837838) internal successors, (153), 148 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2022-01-31 17:13:48,775 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 147 [2022-01-31 17:13:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:48,775 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2022-01-31 17:13:48,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 61 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2022-01-31 17:13:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 17:13:48,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:48,776 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:48,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:13:48,777 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:48,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1000908409, now seen corresponding path program 59 times [2022-01-31 17:13:48,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:48,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171367991] [2022-01-31 17:13:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:48,778 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:48,778 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:48,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:48,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:50,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:50,039 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 17:13:50,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:50,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171367991] [2022-01-31 17:13:50,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171367991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:50,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:50,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:13:50,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845483314] [2022-01-31 17:13:50,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:50,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:13:50,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:13:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:13:50,041 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:51,500 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2022-01-31 17:13:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:13:51,500 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-01-31 17:13:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:51,501 INFO L225 Difference]: With dead ends: 186 [2022-01-31 17:13:51,501 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 17:13:51,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:13:51,502 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 145 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:51,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 56 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:13:51,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 17:13:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-01-31 17:13:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.0333333333333334) internal successors, (155), 150 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2022-01-31 17:13:51,526 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 149 [2022-01-31 17:13:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:51,526 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2022-01-31 17:13:51,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 62 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2022-01-31 17:13:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 17:13:51,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:51,527 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:51,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:13:51,527 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:51,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:51,527 INFO L85 PathProgramCache]: Analyzing trace with hash 763214103, now seen corresponding path program 60 times [2022-01-31 17:13:51,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:51,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115875090] [2022-01-31 17:13:51,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:51,529 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:51,529 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:51,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:51,533 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:52,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:52,704 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 17:13:52,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:52,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115875090] [2022-01-31 17:13:52,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1115875090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:52,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:52,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:13:52,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808363680] [2022-01-31 17:13:52,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:52,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:13:52,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:52,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:13:52,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:13:52,706 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 64 states, 64 states have (on average 2.203125) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:54,153 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2022-01-31 17:13:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:13:54,154 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.203125) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-01-31 17:13:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:54,154 INFO L225 Difference]: With dead ends: 188 [2022-01-31 17:13:54,154 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 17:13:54,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:13:54,156 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 147 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:54,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 51 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:54,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 17:13:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-01-31 17:13:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 152 states have (on average 1.0328947368421053) internal successors, (157), 152 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2022-01-31 17:13:54,183 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 151 [2022-01-31 17:13:54,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:54,183 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2022-01-31 17:13:54,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.203125) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:54,183 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2022-01-31 17:13:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 17:13:54,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:54,183 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:54,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:13:54,184 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:54,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:54,184 INFO L85 PathProgramCache]: Analyzing trace with hash -27747275, now seen corresponding path program 61 times [2022-01-31 17:13:54,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:54,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013898195] [2022-01-31 17:13:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:54,185 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:54,185 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:54,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:54,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:55,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:55,390 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 17:13:55,390 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:55,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013898195] [2022-01-31 17:13:55,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2013898195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:55,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:55,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:13:55,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684178102] [2022-01-31 17:13:55,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:55,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:13:55,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:55,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:13:55,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:13:55,391 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 65 states, 65 states have (on average 2.2) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:56,869 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2022-01-31 17:13:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:13:56,870 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.2) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-01-31 17:13:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:56,870 INFO L225 Difference]: With dead ends: 190 [2022-01-31 17:13:56,870 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 17:13:56,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:13:56,871 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:56,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 56 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 17:13:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-01-31 17:13:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0324675324675325) internal successors, (159), 154 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2022-01-31 17:13:56,896 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 153 [2022-01-31 17:13:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:56,896 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2022-01-31 17:13:56,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.2) internal successors, (143), 64 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2022-01-31 17:13:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:13:56,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:56,897 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:56,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:13:56,897 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:56,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:56,897 INFO L85 PathProgramCache]: Analyzing trace with hash 67579859, now seen corresponding path program 62 times [2022-01-31 17:13:56,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:56,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840142563] [2022-01-31 17:13:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:56,898 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:56,898 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:56,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:56,901 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:58,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:58,177 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 17:13:58,177 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:58,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840142563] [2022-01-31 17:13:58,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [840142563] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:58,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:58,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:13:58,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094770717] [2022-01-31 17:13:58,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:58,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:13:58,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:58,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:13:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:13:58,179 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:59,713 INFO L93 Difference]: Finished difference Result 192 states and 200 transitions. [2022-01-31 17:13:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:13:59,714 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 17:13:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:59,714 INFO L225 Difference]: With dead ends: 192 [2022-01-31 17:13:59,714 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 17:13:59,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:13:59,716 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:59,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 46 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:13:59,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 17:13:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-01-31 17:13:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.0320512820512822) internal successors, (161), 156 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2022-01-31 17:13:59,748 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 155 [2022-01-31 17:13:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:59,748 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2022-01-31 17:13:59,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 65 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2022-01-31 17:13:59,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 17:13:59,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:59,749 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:59,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:13:59,749 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:59,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:59,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1482642417, now seen corresponding path program 63 times [2022-01-31 17:13:59,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:59,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456604273] [2022-01-31 17:13:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:59,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:59,752 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:59,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:59,756 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:01,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:01,027 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 17:14:01,028 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:01,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456604273] [2022-01-31 17:14:01,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [456604273] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:01,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:01,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:14:01,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549463970] [2022-01-31 17:14:01,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:01,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:14:01,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:01,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:14:01,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:14:01,029 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:02,694 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2022-01-31 17:14:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:14:02,694 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-01-31 17:14:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:02,695 INFO L225 Difference]: With dead ends: 194 [2022-01-31 17:14:02,695 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 17:14:02,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:14:02,696 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 153 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:02,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 46 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:14:02,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 17:14:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-01-31 17:14:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.0316455696202531) internal successors, (163), 158 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2022-01-31 17:14:02,723 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 157 [2022-01-31 17:14:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:02,723 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2022-01-31 17:14:02,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 66 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2022-01-31 17:14:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:14:02,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:02,724 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:02,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:14:02,724 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:02,724 INFO L85 PathProgramCache]: Analyzing trace with hash -146872177, now seen corresponding path program 64 times [2022-01-31 17:14:02,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:02,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744832958] [2022-01-31 17:14:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:02,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:02,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:02,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:02,729 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:04,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:04,054 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 17:14:04,054 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:04,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744832958] [2022-01-31 17:14:04,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [744832958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:04,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:04,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:14:04,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957734737] [2022-01-31 17:14:04,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:04,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:14:04,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:04,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:14:04,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:14:04,056 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 68 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:05,666 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2022-01-31 17:14:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:14:05,667 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 17:14:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:05,667 INFO L225 Difference]: With dead ends: 196 [2022-01-31 17:14:05,667 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 17:14:05,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:14:05,669 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 155 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:05,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 46 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:14:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 17:14:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-01-31 17:14:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.03125) internal successors, (165), 160 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2022-01-31 17:14:05,696 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 159 [2022-01-31 17:14:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:05,696 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2022-01-31 17:14:05,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 67 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2022-01-31 17:14:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 17:14:05,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:05,697 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:05,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:14:05,697 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:05,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:05,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1552666029, now seen corresponding path program 65 times [2022-01-31 17:14:05,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:05,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803311581] [2022-01-31 17:14:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:05,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:05,699 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:05,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:05,702 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:07,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:07,040 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 17:14:07,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:07,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803311581] [2022-01-31 17:14:07,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [803311581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:07,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:07,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:14:07,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272997769] [2022-01-31 17:14:07,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:07,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:14:07,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:07,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:14:07,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:14:07,042 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:08,704 INFO L93 Difference]: Finished difference Result 198 states and 206 transitions. [2022-01-31 17:14:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:14:08,705 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-01-31 17:14:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:08,705 INFO L225 Difference]: With dead ends: 198 [2022-01-31 17:14:08,705 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 17:14:08,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:14:08,707 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 157 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:08,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 76 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 17:14:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-01-31 17:14:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0308641975308641) internal successors, (167), 162 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2022-01-31 17:14:08,736 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 161 [2022-01-31 17:14:08,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:08,736 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2022-01-31 17:14:08,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 68 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2022-01-31 17:14:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 17:14:08,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:08,736 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:08,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:14:08,737 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:08,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1573657781, now seen corresponding path program 66 times [2022-01-31 17:14:08,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:08,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518442327] [2022-01-31 17:14:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:08,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:08,738 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:08,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:08,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:10,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:10,135 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:10,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518442327] [2022-01-31 17:14:10,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [518442327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:10,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:10,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:14:10,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651736073] [2022-01-31 17:14:10,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:10,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:14:10,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:10,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:14:10,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:14:10,136 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 70 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:11,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:11,868 INFO L93 Difference]: Finished difference Result 200 states and 208 transitions. [2022-01-31 17:14:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:14:11,869 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 17:14:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:11,869 INFO L225 Difference]: With dead ends: 200 [2022-01-31 17:14:11,869 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 17:14:11,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:14:11,870 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 159 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:11,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 56 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 17:14:11,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-01-31 17:14:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 164 states have (on average 1.0304878048780488) internal successors, (169), 164 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2022-01-31 17:14:11,900 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 163 [2022-01-31 17:14:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:11,900 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2022-01-31 17:14:11,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1857142857142855) internal successors, (153), 69 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2022-01-31 17:14:11,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 17:14:11,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:11,901 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:11,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:14:11,901 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:11,901 INFO L85 PathProgramCache]: Analyzing trace with hash 506268009, now seen corresponding path program 67 times [2022-01-31 17:14:11,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:11,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267289907] [2022-01-31 17:14:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:11,902 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:11,902 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:11,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:11,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:13,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:13,382 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:13,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267289907] [2022-01-31 17:14:13,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [267289907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:13,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:13,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:14:13,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076582178] [2022-01-31 17:14:13,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:13,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:14:13,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:13,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:14:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:14:13,384 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:15,179 INFO L93 Difference]: Finished difference Result 202 states and 210 transitions. [2022-01-31 17:14:15,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:14:15,180 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-01-31 17:14:15,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:15,180 INFO L225 Difference]: With dead ends: 202 [2022-01-31 17:14:15,180 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 17:14:15,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:14:15,181 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 161 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:15,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 51 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 17:14:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-01-31 17:14:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0301204819277108) internal successors, (171), 166 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2022-01-31 17:14:15,211 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 165 [2022-01-31 17:14:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:15,211 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2022-01-31 17:14:15,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.183098591549296) internal successors, (155), 70 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2022-01-31 17:14:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 17:14:15,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:15,212 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:15,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:14:15,212 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:15,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:15,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2139807737, now seen corresponding path program 68 times [2022-01-31 17:14:15,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:15,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086172307] [2022-01-31 17:14:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:15,214 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:15,214 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:15,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:15,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:16,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:16,651 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 17:14:16,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:16,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086172307] [2022-01-31 17:14:16,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086172307] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:16,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:16,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:14:16,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777548877] [2022-01-31 17:14:16,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:16,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:14:16,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:16,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:14:16,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:14:16,659 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:18,553 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2022-01-31 17:14:18,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:14:18,553 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 17:14:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:18,554 INFO L225 Difference]: With dead ends: 204 [2022-01-31 17:14:18,554 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 17:14:18,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:14:18,555 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 163 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:18,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 61 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:18,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 17:14:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-01-31 17:14:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 168 states have (on average 1.0297619047619047) internal successors, (173), 168 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2022-01-31 17:14:18,589 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 167 [2022-01-31 17:14:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:18,589 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2022-01-31 17:14:18,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1805555555555554) internal successors, (157), 71 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2022-01-31 17:14:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 17:14:18,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:18,590 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:18,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:14:18,590 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:18,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:18,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1897006885, now seen corresponding path program 69 times [2022-01-31 17:14:18,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:18,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509653021] [2022-01-31 17:14:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:18,592 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:18,592 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:18,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:18,596 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:20,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:20,050 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:20,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509653021] [2022-01-31 17:14:20,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509653021] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:20,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:20,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:14:20,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868866828] [2022-01-31 17:14:20,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:20,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:14:20,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:20,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:14:20,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:14:20,052 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 73 states, 73 states have (on average 2.1780821917808217) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:21,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:21,931 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2022-01-31 17:14:21,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:14:21,931 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1780821917808217) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-01-31 17:14:21,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:21,932 INFO L225 Difference]: With dead ends: 206 [2022-01-31 17:14:21,932 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 17:14:21,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:14:21,933 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 165 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:21,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 81 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:21,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 17:14:21,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-01-31 17:14:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.0294117647058822) internal successors, (175), 170 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2022-01-31 17:14:21,965 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 169 [2022-01-31 17:14:21,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:21,965 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2022-01-31 17:14:21,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1780821917808217) internal successors, (159), 72 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:21,965 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2022-01-31 17:14:21,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:14:21,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:21,966 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:21,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:14:21,966 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:21,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:21,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1374576957, now seen corresponding path program 70 times [2022-01-31 17:14:21,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:21,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267596558] [2022-01-31 17:14:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:21,967 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:21,967 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:21,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:21,971 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:23,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:23,528 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 17:14:23,528 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:23,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267596558] [2022-01-31 17:14:23,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1267596558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:23,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:23,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:14:23,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756722603] [2022-01-31 17:14:23,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:23,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:14:23,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:14:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:14:23,530 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:25,484 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2022-01-31 17:14:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:14:25,484 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 17:14:25,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:25,486 INFO L225 Difference]: With dead ends: 208 [2022-01-31 17:14:25,486 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 17:14:25,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:14:25,488 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 167 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:25,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 66 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 17:14:25,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-01-31 17:14:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 172 states have (on average 1.0290697674418605) internal successors, (177), 172 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2022-01-31 17:14:25,528 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 171 [2022-01-31 17:14:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:25,528 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2022-01-31 17:14:25,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 73 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:25,528 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2022-01-31 17:14:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 17:14:25,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:25,529 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:25,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:14:25,529 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:25,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:25,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1450588447, now seen corresponding path program 71 times [2022-01-31 17:14:25,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:25,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794646237] [2022-01-31 17:14:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:25,530 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:25,530 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:25,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:25,534 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:27,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:27,080 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 17:14:27,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794646237] [2022-01-31 17:14:27,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1794646237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:27,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:27,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:14:27,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936309765] [2022-01-31 17:14:27,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:27,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:14:27,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:27,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:14:27,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:14:27,082 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 75 states, 75 states have (on average 2.1733333333333333) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:29,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:29,051 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2022-01-31 17:14:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:14:29,052 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.1733333333333333) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-01-31 17:14:29,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:29,052 INFO L225 Difference]: With dead ends: 210 [2022-01-31 17:14:29,052 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 17:14:29,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:14:29,053 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 169 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:29,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 51 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:29,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 17:14:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-01-31 17:14:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.028735632183908) internal successors, (179), 174 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2022-01-31 17:14:29,086 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 173 [2022-01-31 17:14:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:29,086 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2022-01-31 17:14:29,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.1733333333333333) internal successors, (163), 74 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2022-01-31 17:14:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 17:14:29,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:29,087 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:29,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:14:29,087 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1483186305, now seen corresponding path program 72 times [2022-01-31 17:14:29,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:29,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596059179] [2022-01-31 17:14:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:29,088 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:29,088 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:29,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:29,092 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:30,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:30,698 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:30,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596059179] [2022-01-31 17:14:30,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [596059179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:30,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:30,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:14:30,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414096620] [2022-01-31 17:14:30,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:30,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:14:30,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:30,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:14:30,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:14:30,706 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:32,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:32,752 INFO L93 Difference]: Finished difference Result 212 states and 220 transitions. [2022-01-31 17:14:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:14:32,752 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 17:14:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:32,753 INFO L225 Difference]: With dead ends: 212 [2022-01-31 17:14:32,753 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 17:14:32,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:14:32,754 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 171 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:32,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 51 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:32,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 17:14:32,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-01-31 17:14:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 176 states have (on average 1.0284090909090908) internal successors, (181), 176 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2022-01-31 17:14:32,791 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 175 [2022-01-31 17:14:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:32,791 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2022-01-31 17:14:32,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1710526315789473) internal successors, (165), 75 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2022-01-31 17:14:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 17:14:32,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:32,792 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:32,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:14:32,792 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:32,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:32,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1550010525, now seen corresponding path program 73 times [2022-01-31 17:14:32,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:32,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874169913] [2022-01-31 17:14:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:32,793 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:32,793 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:32,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:32,797 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:34,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:34,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:34,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874169913] [2022-01-31 17:14:34,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [874169913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:34,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:34,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:14:34,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268567249] [2022-01-31 17:14:34,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:34,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:14:34,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:34,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:14:34,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:14:34,448 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 77 states, 77 states have (on average 2.168831168831169) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:36,519 INFO L93 Difference]: Finished difference Result 214 states and 222 transitions. [2022-01-31 17:14:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:14:36,519 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.168831168831169) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-01-31 17:14:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:36,520 INFO L225 Difference]: With dead ends: 214 [2022-01-31 17:14:36,520 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 17:14:36,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:14:36,521 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 173 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:36,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 66 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 17:14:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-01-31 17:14:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0280898876404494) internal successors, (183), 178 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2022-01-31 17:14:36,562 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 177 [2022-01-31 17:14:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:36,562 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2022-01-31 17:14:36,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.168831168831169) internal successors, (167), 76 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2022-01-31 17:14:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:14:36,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:36,563 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:36,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:14:36,563 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:36,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:36,563 INFO L85 PathProgramCache]: Analyzing trace with hash 169370171, now seen corresponding path program 74 times [2022-01-31 17:14:36,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:36,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718716574] [2022-01-31 17:14:36,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:36,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:36,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:36,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:36,569 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:38,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:38,313 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:38,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718716574] [2022-01-31 17:14:38,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1718716574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:38,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:38,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:14:38,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061302122] [2022-01-31 17:14:38,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:38,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:14:38,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:38,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:14:38,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:14:38,315 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand has 78 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:40,448 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2022-01-31 17:14:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:14:40,448 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 17:14:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:40,448 INFO L225 Difference]: With dead ends: 216 [2022-01-31 17:14:40,449 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 17:14:40,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:14:40,450 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 175 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:40,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 71 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:40,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 17:14:40,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-01-31 17:14:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.0277777777777777) internal successors, (185), 180 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2022-01-31 17:14:40,485 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 179 [2022-01-31 17:14:40,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:40,485 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2022-01-31 17:14:40,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 77 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2022-01-31 17:14:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 17:14:40,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:40,486 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:40,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:14:40,486 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:40,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:40,486 INFO L85 PathProgramCache]: Analyzing trace with hash 518884441, now seen corresponding path program 75 times [2022-01-31 17:14:40,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:40,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987319061] [2022-01-31 17:14:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:40,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:40,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:40,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:40,491 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:42,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:42,266 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 17:14:42,266 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:42,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987319061] [2022-01-31 17:14:42,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [987319061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:42,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:42,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:14:42,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134789877] [2022-01-31 17:14:42,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:42,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:14:42,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:42,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:14:42,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:14:42,268 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 79 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:44,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:44,401 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2022-01-31 17:14:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:14:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-01-31 17:14:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:44,402 INFO L225 Difference]: With dead ends: 218 [2022-01-31 17:14:44,402 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 17:14:44,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:14:44,403 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 177 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:44,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 41 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:14:44,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 17:14:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-01-31 17:14:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.0274725274725274) internal successors, (187), 182 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2022-01-31 17:14:44,440 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 181 [2022-01-31 17:14:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:44,440 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2022-01-31 17:14:44,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 78 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2022-01-31 17:14:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:14:44,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:44,441 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:44,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:14:44,441 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:44,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1394648823, now seen corresponding path program 76 times [2022-01-31 17:14:44,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:44,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702873043] [2022-01-31 17:14:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:44,443 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:44,443 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:44,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:44,447 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:46,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:46,247 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 17:14:46,248 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:46,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702873043] [2022-01-31 17:14:46,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1702873043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:46,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:46,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:14:46,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704595366] [2022-01-31 17:14:46,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:46,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:14:46,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:46,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:14:46,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:14:46,250 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand has 80 states, 80 states have (on average 2.1625) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:48,572 INFO L93 Difference]: Finished difference Result 220 states and 228 transitions. [2022-01-31 17:14:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:14:48,573 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1625) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 17:14:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:48,573 INFO L225 Difference]: With dead ends: 220 [2022-01-31 17:14:48,573 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 17:14:48,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:14:48,574 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 179 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:48,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 61 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:48,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 17:14:48,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-01-31 17:14:48,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.0271739130434783) internal successors, (189), 184 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:48,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2022-01-31 17:14:48,612 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 183 [2022-01-31 17:14:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:48,612 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2022-01-31 17:14:48,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1625) internal successors, (173), 79 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2022-01-31 17:14:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 17:14:48,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:48,613 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:48,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:14:48,613 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:48,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1190629909, now seen corresponding path program 77 times [2022-01-31 17:14:48,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:48,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040794673] [2022-01-31 17:14:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:48,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:48,614 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:48,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:48,619 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:50,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:50,435 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 17:14:50,435 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:50,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040794673] [2022-01-31 17:14:50,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2040794673] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:50,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:50,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:14:50,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648329496] [2022-01-31 17:14:50,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:50,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:14:50,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:50,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:14:50,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:14:50,437 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:52,713 INFO L93 Difference]: Finished difference Result 222 states and 230 transitions. [2022-01-31 17:14:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:14:52,713 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-01-31 17:14:52,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:52,714 INFO L225 Difference]: With dead ends: 222 [2022-01-31 17:14:52,714 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 17:14:52,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:14:52,716 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 181 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:52,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 66 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 17:14:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-01-31 17:14:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.0268817204301075) internal successors, (191), 186 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2022-01-31 17:14:52,762 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 185 [2022-01-31 17:14:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:52,762 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2022-01-31 17:14:52,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 80 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:52,762 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2022-01-31 17:14:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:14:52,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:52,762 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:52,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:14:52,763 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:52,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:52,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1598018125, now seen corresponding path program 78 times [2022-01-31 17:14:52,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:52,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187158482] [2022-01-31 17:14:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:52,764 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:52,764 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:52,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:52,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:54,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:54,621 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 17:14:54,621 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:54,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187158482] [2022-01-31 17:14:54,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1187158482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:54,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:54,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:14:54,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639832192] [2022-01-31 17:14:54,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:54,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:14:54,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:54,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:14:54,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:14:54,628 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 82 states, 82 states have (on average 2.158536585365854) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:56,933 INFO L93 Difference]: Finished difference Result 224 states and 232 transitions. [2022-01-31 17:14:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:14:56,933 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.158536585365854) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 17:14:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:56,933 INFO L225 Difference]: With dead ends: 224 [2022-01-31 17:14:56,934 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 17:14:56,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:14:56,935 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 183 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:56,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 51 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 17:14:56,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-01-31 17:14:56,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 188 states have (on average 1.0265957446808511) internal successors, (193), 188 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2022-01-31 17:14:56,980 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 187 [2022-01-31 17:14:56,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:56,980 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2022-01-31 17:14:56,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.158536585365854) internal successors, (177), 81 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:56,980 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2022-01-31 17:14:56,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 17:14:56,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:56,983 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:56,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:14:56,983 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:56,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1429186095, now seen corresponding path program 79 times [2022-01-31 17:14:56,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:56,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835599911] [2022-01-31 17:14:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:56,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:56,985 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:56,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:56,989 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:58,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:58,926 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:58,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835599911] [2022-01-31 17:14:58,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1835599911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:58,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:58,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:14:58,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761402056] [2022-01-31 17:14:58,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:58,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:14:58,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:14:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:14:58,928 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand has 83 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:01,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:01,310 INFO L93 Difference]: Finished difference Result 226 states and 234 transitions. [2022-01-31 17:15:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:15:01,310 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-01-31 17:15:01,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:01,311 INFO L225 Difference]: With dead ends: 226 [2022-01-31 17:15:01,311 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 17:15:01,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:15:01,312 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 185 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:01,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 56 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 17:15:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-01-31 17:15:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.0263157894736843) internal successors, (195), 190 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2022-01-31 17:15:01,352 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 189 [2022-01-31 17:15:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:01,352 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2022-01-31 17:15:01,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 82 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2022-01-31 17:15:01,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 17:15:01,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:01,353 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:01,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:15:01,353 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1904604783, now seen corresponding path program 80 times [2022-01-31 17:15:01,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:01,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303072367] [2022-01-31 17:15:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:01,355 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:01,355 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:01,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:01,360 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:03,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:03,420 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:03,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303072367] [2022-01-31 17:15:03,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1303072367] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:03,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:03,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:15:03,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199680873] [2022-01-31 17:15:03,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:03,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:15:03,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:03,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:15:03,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:15:03,422 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:05,910 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2022-01-31 17:15:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:15:05,910 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 17:15:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:05,911 INFO L225 Difference]: With dead ends: 228 [2022-01-31 17:15:05,911 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 17:15:05,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:15:05,913 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 187 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:05,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 56 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 17:15:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-01-31 17:15:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 192 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2022-01-31 17:15:05,960 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 191 [2022-01-31 17:15:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:05,960 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2022-01-31 17:15:05,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 83 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2022-01-31 17:15:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 17:15:05,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:05,961 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:05,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:15:05,961 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:05,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:05,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1632035725, now seen corresponding path program 81 times [2022-01-31 17:15:05,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:05,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386436628] [2022-01-31 17:15:05,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:05,962 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:05,962 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:05,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:05,967 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:07,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:07,963 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386436628] [2022-01-31 17:15:07,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1386436628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:07,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:07,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:15:07,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129474266] [2022-01-31 17:15:07,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:07,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:15:07,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:07,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:15:07,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:15:07,964 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 85 states, 85 states have (on average 2.152941176470588) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:10,422 INFO L93 Difference]: Finished difference Result 230 states and 238 transitions. [2022-01-31 17:15:10,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:15:10,422 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.152941176470588) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-01-31 17:15:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:10,423 INFO L225 Difference]: With dead ends: 230 [2022-01-31 17:15:10,423 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 17:15:10,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:15:10,425 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 189 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:10,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 46 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 17:15:10,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-01-31 17:15:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.0257731958762886) internal successors, (199), 194 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2022-01-31 17:15:10,488 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 193 [2022-01-31 17:15:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:10,488 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2022-01-31 17:15:10,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.152941176470588) internal successors, (183), 84 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2022-01-31 17:15:10,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:15:10,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:10,490 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:10,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:15:10,490 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:10,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:10,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1686176043, now seen corresponding path program 82 times [2022-01-31 17:15:10,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:10,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183621303] [2022-01-31 17:15:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:10,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:10,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:10,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:10,501 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:12,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:12,574 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 17:15:12,574 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:12,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183621303] [2022-01-31 17:15:12,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1183621303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:12,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:12,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:15:12,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679923130] [2022-01-31 17:15:12,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:12,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:15:12,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:12,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:15:12,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:15:12,576 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:15,171 INFO L93 Difference]: Finished difference Result 232 states and 240 transitions. [2022-01-31 17:15:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:15:15,172 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 17:15:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:15,172 INFO L225 Difference]: With dead ends: 232 [2022-01-31 17:15:15,172 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 17:15:15,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:15:15,174 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 191 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:15,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 61 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 17:15:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-01-31 17:15:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 196 states have (on average 1.0255102040816326) internal successors, (201), 196 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2022-01-31 17:15:15,224 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 195 [2022-01-31 17:15:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:15,224 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2022-01-31 17:15:15,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 85 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2022-01-31 17:15:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 17:15:15,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:15,225 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:15,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:15:15,225 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:15,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:15,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2119553207, now seen corresponding path program 83 times [2022-01-31 17:15:15,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:15,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303216228] [2022-01-31 17:15:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:15,227 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:15,227 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:15,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:15,231 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:17,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:17,368 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 17:15:17,368 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:17,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303216228] [2022-01-31 17:15:17,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1303216228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:17,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:17,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:15:17,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348599857] [2022-01-31 17:15:17,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:17,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:15:17,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:17,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:15:17,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:15:17,369 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand has 87 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:19,996 INFO L93 Difference]: Finished difference Result 234 states and 242 transitions. [2022-01-31 17:15:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:15:19,997 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-01-31 17:15:19,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:19,997 INFO L225 Difference]: With dead ends: 234 [2022-01-31 17:15:19,997 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 17:15:19,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:15:19,999 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 193 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:19,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 61 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 17:15:20,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-01-31 17:15:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.0252525252525253) internal successors, (203), 198 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2022-01-31 17:15:20,054 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 197 [2022-01-31 17:15:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:20,055 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2022-01-31 17:15:20,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 86 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2022-01-31 17:15:20,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 17:15:20,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:20,055 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:20,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:15:20,055 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:20,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:20,056 INFO L85 PathProgramCache]: Analyzing trace with hash -113226265, now seen corresponding path program 84 times [2022-01-31 17:15:20,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:20,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908618678] [2022-01-31 17:15:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:20,058 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:20,058 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:20,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:20,063 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:22,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:22,212 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:22,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908618678] [2022-01-31 17:15:22,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [908618678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:22,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:22,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:15:22,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773420688] [2022-01-31 17:15:22,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:22,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:15:22,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:22,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:15:22,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:15:22,215 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 88 states, 88 states have (on average 2.147727272727273) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:24,872 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2022-01-31 17:15:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:15:24,872 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.147727272727273) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 17:15:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:24,873 INFO L225 Difference]: With dead ends: 236 [2022-01-31 17:15:24,873 INFO L226 Difference]: Without dead ends: 207 [2022-01-31 17:15:24,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:15:24,875 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 195 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:24,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 61 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:24,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-31 17:15:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-01-31 17:15:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 200 states have (on average 1.025) internal successors, (205), 200 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2022-01-31 17:15:24,927 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 199 [2022-01-31 17:15:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:24,927 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2022-01-31 17:15:24,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.147727272727273) internal successors, (189), 87 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2022-01-31 17:15:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 17:15:24,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:24,928 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:24,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:15:24,928 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash -473350907, now seen corresponding path program 85 times [2022-01-31 17:15:24,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:24,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115207835] [2022-01-31 17:15:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:24,930 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:24,930 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:24,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:24,935 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:27,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:27,152 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 17:15:27,152 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:27,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115207835] [2022-01-31 17:15:27,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1115207835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:27,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:27,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:15:27,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564894701] [2022-01-31 17:15:27,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:27,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:15:27,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:27,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:15:27,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:15:27,154 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand has 89 states, 89 states have (on average 2.146067415730337) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:29,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:29,905 INFO L93 Difference]: Finished difference Result 238 states and 246 transitions. [2022-01-31 17:15:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:15:29,905 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.146067415730337) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 17:15:29,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:29,906 INFO L225 Difference]: With dead ends: 238 [2022-01-31 17:15:29,906 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 17:15:29,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:15:29,908 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 197 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:29,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 51 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:29,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 17:15:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-01-31 17:15:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.0247524752475248) internal successors, (207), 202 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:29,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2022-01-31 17:15:29,963 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 201 [2022-01-31 17:15:29,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:29,963 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2022-01-31 17:15:29,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.146067415730337) internal successors, (191), 88 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2022-01-31 17:15:29,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:15:29,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:29,964 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:29,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:15:29,964 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:29,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1339219107, now seen corresponding path program 86 times [2022-01-31 17:15:29,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:29,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800043680] [2022-01-31 17:15:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:29,966 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:29,966 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:29,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:29,971 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:32,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:32,259 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 17:15:32,259 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:32,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800043680] [2022-01-31 17:15:32,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [800043680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:32,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:32,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:15:32,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348331893] [2022-01-31 17:15:32,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:32,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:15:32,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:15:32,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:15:32,261 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand has 90 states, 90 states have (on average 2.1444444444444444) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:35,100 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2022-01-31 17:15:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:15:35,100 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.1444444444444444) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 17:15:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:35,101 INFO L225 Difference]: With dead ends: 240 [2022-01-31 17:15:35,101 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 17:15:35,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:15:35,102 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 199 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:35,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 46 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 17:15:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-01-31 17:15:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 204 states have (on average 1.0245098039215685) internal successors, (209), 204 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2022-01-31 17:15:35,150 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 203 [2022-01-31 17:15:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:35,150 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2022-01-31 17:15:35,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.1444444444444444) internal successors, (193), 89 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2022-01-31 17:15:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 17:15:35,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:35,151 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:35,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:15:35,151 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:35,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:35,151 INFO L85 PathProgramCache]: Analyzing trace with hash -537719615, now seen corresponding path program 87 times [2022-01-31 17:15:35,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:35,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027010140] [2022-01-31 17:15:35,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:35,153 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:35,153 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:35,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:35,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:37,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:37,452 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:37,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027010140] [2022-01-31 17:15:37,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027010140] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:37,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:37,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:15:37,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080724190] [2022-01-31 17:15:37,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:37,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:15:37,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:37,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:15:37,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:15:37,454 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:40,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:40,370 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2022-01-31 17:15:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:15:40,372 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-01-31 17:15:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:40,372 INFO L225 Difference]: With dead ends: 242 [2022-01-31 17:15:40,373 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 17:15:40,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:15:40,374 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 201 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:40,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 66 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:40,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 17:15:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-01-31 17:15:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.0242718446601942) internal successors, (211), 206 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2022-01-31 17:15:40,424 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 205 [2022-01-31 17:15:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:40,424 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2022-01-31 17:15:40,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.142857142857143) internal successors, (195), 90 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2022-01-31 17:15:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:15:40,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:40,425 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:40,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:15:40,425 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:40,425 INFO L85 PathProgramCache]: Analyzing trace with hash -389567137, now seen corresponding path program 88 times [2022-01-31 17:15:40,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:40,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354092362] [2022-01-31 17:15:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:40,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:40,426 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:40,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:40,432 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:42,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:42,799 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:42,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354092362] [2022-01-31 17:15:42,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1354092362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:42,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:42,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:15:42,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534407740] [2022-01-31 17:15:42,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:42,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:15:42,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:15:42,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:15:42,802 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand has 92 states, 92 states have (on average 2.141304347826087) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:45,814 INFO L93 Difference]: Finished difference Result 244 states and 252 transitions. [2022-01-31 17:15:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:15:45,814 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.141304347826087) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 17:15:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:45,815 INFO L225 Difference]: With dead ends: 244 [2022-01-31 17:15:45,815 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 17:15:45,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:15:45,817 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 203 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:45,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 76 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 17:15:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-01-31 17:15:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.0240384615384615) internal successors, (213), 208 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 218 transitions. [2022-01-31 17:15:45,876 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 218 transitions. Word has length 207 [2022-01-31 17:15:45,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:45,876 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 218 transitions. [2022-01-31 17:15:45,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.141304347826087) internal successors, (197), 91 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:45,876 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 218 transitions. [2022-01-31 17:15:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 17:15:45,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:45,877 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:45,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:15:45,877 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:45,877 INFO L85 PathProgramCache]: Analyzing trace with hash 251043453, now seen corresponding path program 89 times [2022-01-31 17:15:45,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:45,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954880432] [2022-01-31 17:15:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:45,878 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:45,878 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:45,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:45,884 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:48,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:48,461 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 17:15:48,461 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:48,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954880432] [2022-01-31 17:15:48,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1954880432] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:48,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:48,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:15:48,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412432276] [2022-01-31 17:15:48,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:48,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:15:48,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:48,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:15:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:15:48,463 INFO L87 Difference]: Start difference. First operand 214 states and 218 transitions. Second operand has 93 states, 93 states have (on average 2.139784946236559) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:51,455 INFO L93 Difference]: Finished difference Result 246 states and 254 transitions. [2022-01-31 17:15:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:15:51,455 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.139784946236559) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-01-31 17:15:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:51,456 INFO L225 Difference]: With dead ends: 246 [2022-01-31 17:15:51,456 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 17:15:51,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:15:51,457 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 205 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:51,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 61 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 17:15:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-01-31 17:15:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.0238095238095237) internal successors, (215), 210 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2022-01-31 17:15:51,508 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 209 [2022-01-31 17:15:51,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:51,508 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2022-01-31 17:15:51,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.139784946236559) internal successors, (199), 92 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:51,508 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2022-01-31 17:15:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:15:51,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:51,509 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:51,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:15:51,509 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:51,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1697497115, now seen corresponding path program 90 times [2022-01-31 17:15:51,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:51,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803764102] [2022-01-31 17:15:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:51,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:51,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:51,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:51,516 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:53,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:53,963 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:53,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803764102] [2022-01-31 17:15:53,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803764102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:53,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:53,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:15:53,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536259707] [2022-01-31 17:15:53,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:53,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:15:53,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:53,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:15:53,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:15:53,966 INFO L87 Difference]: Start difference. First operand 216 states and 220 transitions. Second operand has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:57,004 INFO L93 Difference]: Finished difference Result 248 states and 256 transitions. [2022-01-31 17:15:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:15:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 17:15:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:57,005 INFO L225 Difference]: With dead ends: 248 [2022-01-31 17:15:57,006 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 17:15:57,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:15:57,007 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 207 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:57,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 41 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 17:15:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2022-01-31 17:15:57,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 212 states have (on average 1.0235849056603774) internal successors, (217), 212 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 222 transitions. [2022-01-31 17:15:57,069 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 222 transitions. Word has length 211 [2022-01-31 17:15:57,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:57,069 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 222 transitions. [2022-01-31 17:15:57,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.1382978723404253) internal successors, (201), 93 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:57,069 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 222 transitions. [2022-01-31 17:15:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 17:15:57,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:57,070 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:57,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:15:57,070 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:57,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:57,070 INFO L85 PathProgramCache]: Analyzing trace with hash 170062393, now seen corresponding path program 91 times [2022-01-31 17:15:57,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:57,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249034953] [2022-01-31 17:15:57,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:57,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:57,072 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:57,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:57,077 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:59,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:59,578 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 17:15:59,578 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:59,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249034953] [2022-01-31 17:15:59,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1249034953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:59,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:59,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:15:59,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533847907] [2022-01-31 17:15:59,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:59,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:15:59,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:59,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:15:59,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:15:59,580 INFO L87 Difference]: Start difference. First operand 218 states and 222 transitions. Second operand has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:02,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:02,751 INFO L93 Difference]: Finished difference Result 250 states and 258 transitions. [2022-01-31 17:16:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:16:02,751 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-01-31 17:16:02,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:02,752 INFO L225 Difference]: With dead ends: 250 [2022-01-31 17:16:02,752 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 17:16:02,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:16:02,753 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 209 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:02,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 76 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 17:16:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-01-31 17:16:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.0233644859813085) internal successors, (219), 214 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 224 transitions. [2022-01-31 17:16:02,806 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 224 transitions. Word has length 213 [2022-01-31 17:16:02,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:02,806 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 224 transitions. [2022-01-31 17:16:02,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 94 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:02,806 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 224 transitions. [2022-01-31 17:16:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:16:02,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:02,807 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:02,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:16:02,807 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:02,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1184109783, now seen corresponding path program 92 times [2022-01-31 17:16:02,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:02,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80093937] [2022-01-31 17:16:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:02,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:02,809 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:02,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:02,814 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:05,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:05,370 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 17:16:05,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:05,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80093937] [2022-01-31 17:16:05,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [80093937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:05,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:05,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:16:05,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840213514] [2022-01-31 17:16:05,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:05,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:16:05,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:05,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:16:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:16:05,373 INFO L87 Difference]: Start difference. First operand 220 states and 224 transitions. Second operand has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:08,530 INFO L93 Difference]: Finished difference Result 252 states and 260 transitions. [2022-01-31 17:16:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:16:08,531 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 17:16:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:08,531 INFO L225 Difference]: With dead ends: 252 [2022-01-31 17:16:08,531 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 17:16:08,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:16:08,533 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 211 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:08,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 61 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 17:16:08,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2022-01-31 17:16:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 216 states have (on average 1.0231481481481481) internal successors, (221), 216 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 226 transitions. [2022-01-31 17:16:08,598 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 226 transitions. Word has length 215 [2022-01-31 17:16:08,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:08,598 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 226 transitions. [2022-01-31 17:16:08,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1354166666666665) internal successors, (205), 95 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 226 transitions. [2022-01-31 17:16:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 17:16:08,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:08,599 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:08,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:16:08,599 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash 726075381, now seen corresponding path program 93 times [2022-01-31 17:16:08,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:08,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511182591] [2022-01-31 17:16:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:08,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:08,601 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:08,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:08,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:11,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:11,282 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:11,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511182591] [2022-01-31 17:16:11,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511182591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:11,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:11,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:16:11,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192693895] [2022-01-31 17:16:11,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:11,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:16:11,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:11,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:16:11,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:16:11,284 INFO L87 Difference]: Start difference. First operand 222 states and 226 transitions. Second operand has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:14,516 INFO L93 Difference]: Finished difference Result 254 states and 262 transitions. [2022-01-31 17:16:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:16:14,517 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-01-31 17:16:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:14,517 INFO L225 Difference]: With dead ends: 254 [2022-01-31 17:16:14,517 INFO L226 Difference]: Without dead ends: 225 [2022-01-31 17:16:14,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:16:14,519 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 213 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:14,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 71 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-31 17:16:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2022-01-31 17:16:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 218 states have (on average 1.0229357798165137) internal successors, (223), 218 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 228 transitions. [2022-01-31 17:16:14,574 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 228 transitions. Word has length 217 [2022-01-31 17:16:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:14,574 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 228 transitions. [2022-01-31 17:16:14,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 96 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 228 transitions. [2022-01-31 17:16:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:16:14,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:14,575 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:14,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:16:14,575 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:14,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1358320749, now seen corresponding path program 94 times [2022-01-31 17:16:14,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:14,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118003236] [2022-01-31 17:16:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:14,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:14,576 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:14,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:14,587 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:17,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:17,265 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 17:16:17,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:17,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118003236] [2022-01-31 17:16:17,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1118003236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:17,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:17,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:16:17,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149949239] [2022-01-31 17:16:17,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:17,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:16:17,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:17,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:16:17,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:16:17,267 INFO L87 Difference]: Start difference. First operand 224 states and 228 transitions. Second operand has 98 states, 98 states have (on average 2.13265306122449) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:20,511 INFO L93 Difference]: Finished difference Result 256 states and 264 transitions. [2022-01-31 17:16:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:16:20,512 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.13265306122449) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 17:16:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:20,512 INFO L225 Difference]: With dead ends: 256 [2022-01-31 17:16:20,512 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 17:16:20,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:16:20,514 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 215 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:20,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 41 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 17:16:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-01-31 17:16:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.0227272727272727) internal successors, (225), 220 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 230 transitions. [2022-01-31 17:16:20,570 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 230 transitions. Word has length 219 [2022-01-31 17:16:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:20,570 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 230 transitions. [2022-01-31 17:16:20,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.13265306122449) internal successors, (209), 97 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 230 transitions. [2022-01-31 17:16:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 17:16:20,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:20,571 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:20,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:16:20,571 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:20,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:20,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1286725553, now seen corresponding path program 95 times [2022-01-31 17:16:20,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:20,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159915769] [2022-01-31 17:16:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:20,572 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:20,572 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:20,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:20,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:23,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:23,305 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 17:16:23,305 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:23,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159915769] [2022-01-31 17:16:23,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159915769] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:23,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:23,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:16:23,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898102545] [2022-01-31 17:16:23,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:23,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:16:23,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:23,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:16:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:16:23,307 INFO L87 Difference]: Start difference. First operand 226 states and 230 transitions. Second operand has 99 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:26,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:26,728 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2022-01-31 17:16:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:16:26,729 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-01-31 17:16:26,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:26,729 INFO L225 Difference]: With dead ends: 258 [2022-01-31 17:16:26,729 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 17:16:26,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:16:26,731 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 217 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:26,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 91 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:16:26,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 17:16:26,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-01-31 17:16:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 222 states have (on average 1.0225225225225225) internal successors, (227), 222 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 232 transitions. [2022-01-31 17:16:26,787 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 232 transitions. Word has length 221 [2022-01-31 17:16:26,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:26,787 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 232 transitions. [2022-01-31 17:16:26,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 98 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:26,788 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 232 transitions. [2022-01-31 17:16:26,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 17:16:26,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:26,788 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:26,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:16:26,788 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:26,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:26,789 INFO L85 PathProgramCache]: Analyzing trace with hash 555582543, now seen corresponding path program 96 times [2022-01-31 17:16:26,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:26,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733517916] [2022-01-31 17:16:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:26,790 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:26,790 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:26,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:26,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:29,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:29,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:29,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733517916] [2022-01-31 17:16:29,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1733517916] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:29,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:29,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:16:29,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984020018] [2022-01-31 17:16:29,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:29,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:16:29,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:29,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:16:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:16:29,620 INFO L87 Difference]: Start difference. First operand 228 states and 232 transitions. Second operand has 100 states, 100 states have (on average 2.13) internal successors, (213), 99 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:33,203 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2022-01-31 17:16:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:16:33,203 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.13) internal successors, (213), 99 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-01-31 17:16:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:33,204 INFO L225 Difference]: With dead ends: 260 [2022-01-31 17:16:33,204 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 17:16:33,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:16:33,205 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 219 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:33,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 46 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 17:16:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2022-01-31 17:16:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 224 states have (on average 1.0223214285714286) internal successors, (229), 224 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:33,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 234 transitions. [2022-01-31 17:16:33,263 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 234 transitions. Word has length 223 [2022-01-31 17:16:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:33,263 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 234 transitions. [2022-01-31 17:16:33,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.13) internal successors, (213), 99 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 234 transitions. [2022-01-31 17:16:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 17:16:33,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:33,264 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:33,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:16:33,264 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:33,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1993180819, now seen corresponding path program 97 times [2022-01-31 17:16:33,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:33,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586024893] [2022-01-31 17:16:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:33,266 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:33,266 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:33,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:33,272 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:36,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:36,115 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:36,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586024893] [2022-01-31 17:16:36,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1586024893] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:36,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:36,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:16:36,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569278399] [2022-01-31 17:16:36,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:36,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:16:36,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:16:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:16:36,117 INFO L87 Difference]: Start difference. First operand 230 states and 234 transitions. Second operand has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:39,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:39,593 INFO L93 Difference]: Finished difference Result 262 states and 270 transitions. [2022-01-31 17:16:39,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:16:39,593 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-01-31 17:16:39,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:39,594 INFO L225 Difference]: With dead ends: 262 [2022-01-31 17:16:39,594 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 17:16:39,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:16:39,596 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 221 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:39,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 56 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 17:16:39,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2022-01-31 17:16:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0221238938053097) internal successors, (231), 226 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 236 transitions. [2022-01-31 17:16:39,654 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 236 transitions. Word has length 225 [2022-01-31 17:16:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:39,655 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 236 transitions. [2022-01-31 17:16:39,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 100 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 236 transitions. [2022-01-31 17:16:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:16:39,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:39,655 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:39,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:16:39,656 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:39,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1071554315, now seen corresponding path program 98 times [2022-01-31 17:16:39,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:39,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910008108] [2022-01-31 17:16:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:39,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:39,657 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:39,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:39,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:42,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:42,568 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 17:16:42,568 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:42,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910008108] [2022-01-31 17:16:42,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [910008108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:42,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:42,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:16:42,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134943604] [2022-01-31 17:16:42,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:42,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:16:42,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:42,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:16:42,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:16:42,570 INFO L87 Difference]: Start difference. First operand 232 states and 236 transitions. Second operand has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:46,131 INFO L93 Difference]: Finished difference Result 264 states and 272 transitions. [2022-01-31 17:16:46,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:16:46,131 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 17:16:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:46,132 INFO L225 Difference]: With dead ends: 264 [2022-01-31 17:16:46,132 INFO L226 Difference]: Without dead ends: 235 [2022-01-31 17:16:46,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:16:46,134 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 223 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:46,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 56 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-31 17:16:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2022-01-31 17:16:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 228 states have (on average 1.0219298245614035) internal successors, (233), 228 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:46,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 238 transitions. [2022-01-31 17:16:46,194 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 238 transitions. Word has length 227 [2022-01-31 17:16:46,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:46,194 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 238 transitions. [2022-01-31 17:16:46,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:46,195 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 238 transitions. [2022-01-31 17:16:46,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 17:16:46,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:46,195 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:46,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:16:46,196 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:46,196 INFO L85 PathProgramCache]: Analyzing trace with hash -65546967, now seen corresponding path program 99 times [2022-01-31 17:16:46,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:46,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476698296] [2022-01-31 17:16:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:46,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:46,197 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:46,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:46,206 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:49,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:49,342 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 17:16:49,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:49,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476698296] [2022-01-31 17:16:49,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [476698296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:49,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:49,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:16:49,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876710790] [2022-01-31 17:16:49,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:49,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:16:49,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:49,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:16:49,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:16:49,344 INFO L87 Difference]: Start difference. First operand 234 states and 238 transitions. Second operand has 103 states, 103 states have (on average 2.1262135922330097) internal successors, (219), 102 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:52,990 INFO L93 Difference]: Finished difference Result 266 states and 274 transitions. [2022-01-31 17:16:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:16:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.1262135922330097) internal successors, (219), 102 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-01-31 17:16:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:52,990 INFO L225 Difference]: With dead ends: 266 [2022-01-31 17:16:52,991 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 17:16:52,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:16:52,993 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:52,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 56 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 17:16:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2022-01-31 17:16:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.0217391304347827) internal successors, (235), 230 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 240 transitions. [2022-01-31 17:16:53,063 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 240 transitions. Word has length 229 [2022-01-31 17:16:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:53,063 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 240 transitions. [2022-01-31 17:16:53,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.1262135922330097) internal successors, (219), 102 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 240 transitions. [2022-01-31 17:16:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:16:53,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:53,064 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:53,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:16:53,064 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:53,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1898185785, now seen corresponding path program 100 times [2022-01-31 17:16:53,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:53,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279712718] [2022-01-31 17:16:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:53,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:53,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:53,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:53,072 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:56,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:56,057 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 17:16:56,057 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279712718] [2022-01-31 17:16:56,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [279712718] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:56,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:56,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:16:56,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144073249] [2022-01-31 17:16:56,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:56,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:16:56,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:56,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:16:56,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:16:56,059 INFO L87 Difference]: Start difference. First operand 236 states and 240 transitions. Second operand has 104 states, 104 states have (on average 2.125) internal successors, (221), 103 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:59,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:59,730 INFO L93 Difference]: Finished difference Result 268 states and 276 transitions. [2022-01-31 17:16:59,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:16:59,730 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.125) internal successors, (221), 103 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 17:16:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:59,731 INFO L225 Difference]: With dead ends: 268 [2022-01-31 17:16:59,731 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 17:16:59,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:16:59,733 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 227 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:59,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 41 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:59,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 17:16:59,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-01-31 17:16:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 232 states have (on average 1.021551724137931) internal successors, (237), 232 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:16:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 242 transitions. [2022-01-31 17:16:59,805 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 242 transitions. Word has length 231 [2022-01-31 17:16:59,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:59,805 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 242 transitions. [2022-01-31 17:16:59,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.125) internal successors, (221), 103 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:59,805 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 242 transitions. [2022-01-31 17:16:59,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 17:16:59,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:59,806 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:59,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:16:59,806 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:59,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:59,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2127498523, now seen corresponding path program 101 times [2022-01-31 17:16:59,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:59,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24358648] [2022-01-31 17:16:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:59,807 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:59,807 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:59,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:59,814 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:02,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:02,985 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 17:17:02,985 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:02,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24358648] [2022-01-31 17:17:02,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [24358648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:02,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:02,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:17:02,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598092054] [2022-01-31 17:17:02,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:02,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:17:02,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:17:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:17:02,988 INFO L87 Difference]: Start difference. First operand 238 states and 242 transitions. Second operand has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 104 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:06,780 INFO L93 Difference]: Finished difference Result 270 states and 278 transitions. [2022-01-31 17:17:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:17:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 104 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-01-31 17:17:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:06,781 INFO L225 Difference]: With dead ends: 270 [2022-01-31 17:17:06,781 INFO L226 Difference]: Without dead ends: 241 [2022-01-31 17:17:06,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:17:06,782 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 229 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:06,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 66 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-31 17:17:06,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2022-01-31 17:17:06,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.0213675213675213) internal successors, (239), 234 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 244 transitions. [2022-01-31 17:17:06,849 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 244 transitions. Word has length 233 [2022-01-31 17:17:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:06,850 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 244 transitions. [2022-01-31 17:17:06,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 104 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:06,850 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 244 transitions. [2022-01-31 17:17:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:17:06,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:06,850 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:06,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:17:06,851 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash 841259651, now seen corresponding path program 102 times [2022-01-31 17:17:06,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:06,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397313286] [2022-01-31 17:17:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:06,852 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:06,852 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:06,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:06,859 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:10,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:10,014 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 17:17:10,014 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:10,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397313286] [2022-01-31 17:17:10,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397313286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:10,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:10,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:17:10,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821987869] [2022-01-31 17:17:10,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:10,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:17:10,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:17:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:17:10,016 INFO L87 Difference]: Start difference. First operand 240 states and 244 transitions. Second operand has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:13,838 INFO L93 Difference]: Finished difference Result 272 states and 280 transitions. [2022-01-31 17:17:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:17:13,839 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 17:17:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:13,839 INFO L225 Difference]: With dead ends: 272 [2022-01-31 17:17:13,839 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 17:17:13,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:17:13,841 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 231 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:13,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 61 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 17:17:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2022-01-31 17:17:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 236 states have (on average 1.021186440677966) internal successors, (241), 236 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 246 transitions. [2022-01-31 17:17:13,920 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 246 transitions. Word has length 235 [2022-01-31 17:17:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:13,920 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 246 transitions. [2022-01-31 17:17:13,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 105 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:13,921 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 246 transitions. [2022-01-31 17:17:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 17:17:13,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:13,921 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:13,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:17:13,921 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:13,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:13,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1959580321, now seen corresponding path program 103 times [2022-01-31 17:17:13,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:13,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555243814] [2022-01-31 17:17:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:13,923 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:13,923 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:13,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:13,929 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:17,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:17,157 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:17,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555243814] [2022-01-31 17:17:17,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1555243814] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:17,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:17,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:17:17,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898522771] [2022-01-31 17:17:17,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:17,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:17:17,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:17:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:17:17,160 INFO L87 Difference]: Start difference. First operand 242 states and 246 transitions. Second operand has 107 states, 107 states have (on average 2.121495327102804) internal successors, (227), 106 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:21,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:21,069 INFO L93 Difference]: Finished difference Result 274 states and 282 transitions. [2022-01-31 17:17:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:17:21,070 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.121495327102804) internal successors, (227), 106 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 237 [2022-01-31 17:17:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:21,070 INFO L225 Difference]: With dead ends: 274 [2022-01-31 17:17:21,070 INFO L226 Difference]: Without dead ends: 245 [2022-01-31 17:17:21,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:17:21,072 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 233 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:21,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 66 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-31 17:17:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-01-31 17:17:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.0210084033613445) internal successors, (243), 238 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 248 transitions. [2022-01-31 17:17:21,139 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 248 transitions. Word has length 237 [2022-01-31 17:17:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:21,139 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 248 transitions. [2022-01-31 17:17:21,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.121495327102804) internal successors, (227), 106 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 248 transitions. [2022-01-31 17:17:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 17:17:21,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:21,140 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:21,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:17:21,140 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:21,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1371047105, now seen corresponding path program 104 times [2022-01-31 17:17:21,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:21,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043420756] [2022-01-31 17:17:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:21,141 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:21,142 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:21,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:21,148 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:24,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:24,376 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 17:17:24,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:24,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043420756] [2022-01-31 17:17:24,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043420756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:24,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:24,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:17:24,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769755987] [2022-01-31 17:17:24,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:24,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:17:24,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:24,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:17:24,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:17:24,378 INFO L87 Difference]: Start difference. First operand 244 states and 248 transitions. Second operand has 108 states, 108 states have (on average 2.1203703703703702) internal successors, (229), 107 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:28,435 INFO L93 Difference]: Finished difference Result 276 states and 284 transitions. [2022-01-31 17:17:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:17:28,436 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.1203703703703702) internal successors, (229), 107 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-01-31 17:17:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:28,436 INFO L225 Difference]: With dead ends: 276 [2022-01-31 17:17:28,436 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 17:17:28,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:17:28,439 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 235 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:28,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 61 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 17:17:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-01-31 17:17:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 240 states have (on average 1.0208333333333333) internal successors, (245), 240 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 250 transitions. [2022-01-31 17:17:28,522 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 250 transitions. Word has length 239 [2022-01-31 17:17:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:28,523 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 250 transitions. [2022-01-31 17:17:28,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.1203703703703702) internal successors, (229), 107 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 250 transitions. [2022-01-31 17:17:28,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 17:17:28,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:28,523 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:28,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:17:28,524 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1941599325, now seen corresponding path program 105 times [2022-01-31 17:17:28,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:28,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797740496] [2022-01-31 17:17:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:28,525 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:28,525 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:28,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:28,532 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:31,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:31,844 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:31,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797740496] [2022-01-31 17:17:31,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [797740496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:31,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:31,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:17:31,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405543480] [2022-01-31 17:17:31,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:31,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:17:31,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:17:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:17:31,846 INFO L87 Difference]: Start difference. First operand 246 states and 250 transitions. Second operand has 109 states, 109 states have (on average 2.1192660550458715) internal successors, (231), 108 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:35,912 INFO L93 Difference]: Finished difference Result 278 states and 286 transitions. [2022-01-31 17:17:35,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:17:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.1192660550458715) internal successors, (231), 108 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-01-31 17:17:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:35,913 INFO L225 Difference]: With dead ends: 278 [2022-01-31 17:17:35,913 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 17:17:35,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:17:35,916 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 237 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:35,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 56 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 17:17:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2022-01-31 17:17:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.0206611570247934) internal successors, (247), 242 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 252 transitions. [2022-01-31 17:17:35,997 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 252 transitions. Word has length 241 [2022-01-31 17:17:35,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:35,998 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 252 transitions. [2022-01-31 17:17:35,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.1192660550458715) internal successors, (231), 108 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 252 transitions. [2022-01-31 17:17:35,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:17:35,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:35,998 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:35,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:17:35,999 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:35,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1470915077, now seen corresponding path program 106 times [2022-01-31 17:17:35,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:35,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967431368] [2022-01-31 17:17:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:36,000 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:36,000 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:36,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:36,007 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:39,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:39,342 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 17:17:39,343 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:39,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967431368] [2022-01-31 17:17:39,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [967431368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:39,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:39,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:17:39,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12048069] [2022-01-31 17:17:39,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:39,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:17:39,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:39,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:17:39,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:17:39,345 INFO L87 Difference]: Start difference. First operand 248 states and 252 transitions. Second operand has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 109 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:43,464 INFO L93 Difference]: Finished difference Result 280 states and 288 transitions. [2022-01-31 17:17:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:17:43,464 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 109 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 17:17:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:43,465 INFO L225 Difference]: With dead ends: 280 [2022-01-31 17:17:43,465 INFO L226 Difference]: Without dead ends: 251 [2022-01-31 17:17:43,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:17:43,467 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 239 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:43,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 66 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-31 17:17:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2022-01-31 17:17:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 244 states have (on average 1.0204918032786885) internal successors, (249), 244 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:43,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 254 transitions. [2022-01-31 17:17:43,546 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 254 transitions. Word has length 243 [2022-01-31 17:17:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:43,546 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 254 transitions. [2022-01-31 17:17:43,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.118181818181818) internal successors, (233), 109 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 254 transitions. [2022-01-31 17:17:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 17:17:43,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:43,547 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:43,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:17:43,547 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash 457758745, now seen corresponding path program 107 times [2022-01-31 17:17:43,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:43,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150878729] [2022-01-31 17:17:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:43,548 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:43,548 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:43,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:43,555 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:46,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:46,977 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 17:17:46,978 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:46,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150878729] [2022-01-31 17:17:46,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [150878729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:46,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:46,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:17:46,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511044926] [2022-01-31 17:17:46,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:46,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:17:46,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:46,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:17:46,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:17:46,981 INFO L87 Difference]: Start difference. First operand 250 states and 254 transitions. Second operand has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:51,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:51,390 INFO L93 Difference]: Finished difference Result 282 states and 290 transitions. [2022-01-31 17:17:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:17:51,390 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-01-31 17:17:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:51,391 INFO L225 Difference]: With dead ends: 282 [2022-01-31 17:17:51,391 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 17:17:51,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:17:51,393 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 241 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:51,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 61 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:17:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 17:17:51,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2022-01-31 17:17:51,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.0203252032520325) internal successors, (251), 246 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:51,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 256 transitions. [2022-01-31 17:17:51,464 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 256 transitions. Word has length 245 [2022-01-31 17:17:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:51,464 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 256 transitions. [2022-01-31 17:17:51,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 110 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:51,465 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 256 transitions. [2022-01-31 17:17:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 17:17:51,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:51,465 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:51,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:17:51,465 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:51,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:51,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1512570185, now seen corresponding path program 108 times [2022-01-31 17:17:51,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:51,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068519099] [2022-01-31 17:17:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:51,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:51,467 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:51,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:51,474 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:54,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:54,946 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 17:17:54,946 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:54,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068519099] [2022-01-31 17:17:54,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1068519099] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:54,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:54,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:17:54,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826693127] [2022-01-31 17:17:54,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:54,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:17:54,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:54,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:17:54,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:17:54,949 INFO L87 Difference]: Start difference. First operand 252 states and 256 transitions. Second operand has 112 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 111 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:59,212 INFO L93 Difference]: Finished difference Result 284 states and 292 transitions. [2022-01-31 17:17:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:17:59,213 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 111 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-01-31 17:17:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:59,214 INFO L225 Difference]: With dead ends: 284 [2022-01-31 17:17:59,214 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 17:17:59,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:17:59,216 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:59,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 56 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:59,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 17:17:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2022-01-31 17:17:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 248 states have (on average 1.0201612903225807) internal successors, (253), 248 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:17:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 258 transitions. [2022-01-31 17:17:59,296 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 258 transitions. Word has length 247 [2022-01-31 17:17:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:59,296 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 258 transitions. [2022-01-31 17:17:59,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 111 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 258 transitions. [2022-01-31 17:17:59,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 17:17:59,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:59,297 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:59,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:17:59,297 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:59,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:59,297 INFO L85 PathProgramCache]: Analyzing trace with hash -918094379, now seen corresponding path program 109 times [2022-01-31 17:17:59,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:59,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405735525] [2022-01-31 17:17:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:59,298 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:59,298 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:59,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:59,306 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:02,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:02,933 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 17:18:02,933 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:02,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405735525] [2022-01-31 17:18:02,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405735525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:02,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:02,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:18:02,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291427711] [2022-01-31 17:18:02,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:02,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:18:02,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:02,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:18:02,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:18:02,936 INFO L87 Difference]: Start difference. First operand 254 states and 258 transitions. Second operand has 113 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 112 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:07,238 INFO L93 Difference]: Finished difference Result 286 states and 294 transitions. [2022-01-31 17:18:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:18:07,238 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 112 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-01-31 17:18:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:07,239 INFO L225 Difference]: With dead ends: 286 [2022-01-31 17:18:07,239 INFO L226 Difference]: Without dead ends: 257 [2022-01-31 17:18:07,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:18:07,241 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 245 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:07,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 56 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-31 17:18:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2022-01-31 17:18:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.02) internal successors, (255), 250 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 260 transitions. [2022-01-31 17:18:07,315 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 260 transitions. Word has length 249 [2022-01-31 17:18:07,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:07,315 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 260 transitions. [2022-01-31 17:18:07,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 112 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:07,315 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 260 transitions. [2022-01-31 17:18:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:18:07,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:07,316 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:07,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:18:07,318 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:07,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:07,327 INFO L85 PathProgramCache]: Analyzing trace with hash -857495181, now seen corresponding path program 110 times [2022-01-31 17:18:07,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:07,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025573876] [2022-01-31 17:18:07,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:07,328 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:07,328 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:07,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:07,346 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:10,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:10,908 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 17:18:10,908 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:10,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025573876] [2022-01-31 17:18:10,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1025573876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:10,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:10,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:18:10,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375118612] [2022-01-31 17:18:10,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:10,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:18:10,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:10,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:18:10,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:18:10,910 INFO L87 Difference]: Start difference. First operand 256 states and 260 transitions. Second operand has 114 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 113 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:15,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:15,278 INFO L93 Difference]: Finished difference Result 288 states and 296 transitions. [2022-01-31 17:18:15,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:18:15,278 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 113 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 17:18:15,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:15,278 INFO L225 Difference]: With dead ends: 288 [2022-01-31 17:18:15,279 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 17:18:15,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:18:15,281 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 247 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:15,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 46 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 17:18:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2022-01-31 17:18:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 252 states have (on average 1.0198412698412698) internal successors, (257), 252 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 262 transitions. [2022-01-31 17:18:15,362 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 262 transitions. Word has length 251 [2022-01-31 17:18:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:15,362 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 262 transitions. [2022-01-31 17:18:15,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 113 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 262 transitions. [2022-01-31 17:18:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-31 17:18:15,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:15,363 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:15,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:18:15,363 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1543759249, now seen corresponding path program 111 times [2022-01-31 17:18:15,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126080977] [2022-01-31 17:18:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:15,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:15,365 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:15,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:15,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:19,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:19,036 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 17:18:19,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:19,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126080977] [2022-01-31 17:18:19,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2126080977] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:19,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:19,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:18:19,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763467329] [2022-01-31 17:18:19,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:19,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:18:19,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:19,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:18:19,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:18:19,039 INFO L87 Difference]: Start difference. First operand 258 states and 262 transitions. Second operand has 115 states, 115 states have (on average 2.1130434782608694) internal successors, (243), 114 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:23,458 INFO L93 Difference]: Finished difference Result 290 states and 298 transitions. [2022-01-31 17:18:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:18:23,459 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.1130434782608694) internal successors, (243), 114 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-01-31 17:18:23,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:23,459 INFO L225 Difference]: With dead ends: 290 [2022-01-31 17:18:23,459 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 17:18:23,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:18:23,462 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:23,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 56 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 17:18:23,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2022-01-31 17:18:23,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 254 states have (on average 1.0196850393700787) internal successors, (259), 254 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 264 transitions. [2022-01-31 17:18:23,550 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 264 transitions. Word has length 253 [2022-01-31 17:18:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:23,551 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 264 transitions. [2022-01-31 17:18:23,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.1130434782608694) internal successors, (243), 114 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 264 transitions. [2022-01-31 17:18:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:18:23,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:23,551 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:23,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:18:23,552 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1543138769, now seen corresponding path program 112 times [2022-01-31 17:18:23,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:23,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119867119] [2022-01-31 17:18:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:23,553 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:23,553 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:23,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:23,561 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:27,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:27,257 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 17:18:27,257 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:27,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119867119] [2022-01-31 17:18:27,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [119867119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:27,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:27,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:18:27,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449861906] [2022-01-31 17:18:27,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:27,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:18:27,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:27,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:18:27,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:18:27,259 INFO L87 Difference]: Start difference. First operand 260 states and 264 transitions. Second operand has 116 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 115 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:31,811 INFO L93 Difference]: Finished difference Result 292 states and 300 transitions. [2022-01-31 17:18:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:18:31,811 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 115 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 17:18:31,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:31,812 INFO L225 Difference]: With dead ends: 292 [2022-01-31 17:18:31,812 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 17:18:31,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:18:31,815 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 251 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:31,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 66 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:31,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 17:18:31,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2022-01-31 17:18:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 256 states have (on average 1.01953125) internal successors, (261), 256 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 266 transitions. [2022-01-31 17:18:31,899 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 266 transitions. Word has length 255 [2022-01-31 17:18:31,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:31,899 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 266 transitions. [2022-01-31 17:18:31,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 115 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:31,899 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 266 transitions. [2022-01-31 17:18:31,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 17:18:31,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:31,900 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:31,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:18:31,900 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash -229732531, now seen corresponding path program 113 times [2022-01-31 17:18:31,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:31,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246063689] [2022-01-31 17:18:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:31,901 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:31,901 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:31,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:31,909 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:35,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:35,665 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 17:18:35,665 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:35,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246063689] [2022-01-31 17:18:35,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [246063689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:35,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:35,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:18:35,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012181925] [2022-01-31 17:18:35,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:35,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:18:35,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:35,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:18:35,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:18:35,667 INFO L87 Difference]: Start difference. First operand 262 states and 266 transitions. Second operand has 117 states, 117 states have (on average 2.111111111111111) internal successors, (247), 116 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:40,268 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2022-01-31 17:18:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:18:40,268 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.111111111111111) internal successors, (247), 116 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-01-31 17:18:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:40,269 INFO L225 Difference]: With dead ends: 294 [2022-01-31 17:18:40,269 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 17:18:40,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:18:40,271 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 253 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:40,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 71 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 17:18:40,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2022-01-31 17:18:40,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 258 states have (on average 1.0193798449612403) internal successors, (263), 258 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 268 transitions. [2022-01-31 17:18:40,364 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 268 transitions. Word has length 257 [2022-01-31 17:18:40,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:40,364 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 268 transitions. [2022-01-31 17:18:40,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.111111111111111) internal successors, (247), 116 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 268 transitions. [2022-01-31 17:18:40,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 17:18:40,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:40,365 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:40,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:18:40,365 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:40,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:40,365 INFO L85 PathProgramCache]: Analyzing trace with hash -766722837, now seen corresponding path program 114 times [2022-01-31 17:18:40,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:40,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307416862] [2022-01-31 17:18:40,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:40,366 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:40,366 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:40,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:40,374 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:44,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:44,177 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 17:18:44,177 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:44,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307416862] [2022-01-31 17:18:44,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [307416862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:44,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:44,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:18:44,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144387048] [2022-01-31 17:18:44,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:44,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:18:44,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:44,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:18:44,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:18:44,179 INFO L87 Difference]: Start difference. First operand 264 states and 268 transitions. Second operand has 118 states, 118 states have (on average 2.110169491525424) internal successors, (249), 117 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:48,984 INFO L93 Difference]: Finished difference Result 296 states and 304 transitions. [2022-01-31 17:18:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:18:48,985 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.110169491525424) internal successors, (249), 117 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-01-31 17:18:48,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:48,985 INFO L225 Difference]: With dead ends: 296 [2022-01-31 17:18:48,985 INFO L226 Difference]: Without dead ends: 267 [2022-01-31 17:18:48,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:18:48,987 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 255 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:48,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 56 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:48,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-31 17:18:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2022-01-31 17:18:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 260 states have (on average 1.0192307692307692) internal successors, (265), 260 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 270 transitions. [2022-01-31 17:18:49,067 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 270 transitions. Word has length 259 [2022-01-31 17:18:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:49,067 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 270 transitions. [2022-01-31 17:18:49,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.110169491525424) internal successors, (249), 117 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 270 transitions. [2022-01-31 17:18:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 17:18:49,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:49,068 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:49,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:18:49,068 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:49,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1418331383, now seen corresponding path program 115 times [2022-01-31 17:18:49,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:49,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806469900] [2022-01-31 17:18:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:49,069 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:49,069 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:49,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:49,077 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:52,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:52,943 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 17:18:52,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:52,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806469900] [2022-01-31 17:18:52,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [806469900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:52,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:52,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:18:52,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066067449] [2022-01-31 17:18:52,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:52,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:18:52,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:52,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:18:52,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:18:52,945 INFO L87 Difference]: Start difference. First operand 266 states and 270 transitions. Second operand has 119 states, 119 states have (on average 2.1092436974789917) internal successors, (251), 118 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:57,680 INFO L93 Difference]: Finished difference Result 298 states and 306 transitions. [2022-01-31 17:18:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:18:57,680 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.1092436974789917) internal successors, (251), 118 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2022-01-31 17:18:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:57,681 INFO L225 Difference]: With dead ends: 298 [2022-01-31 17:18:57,681 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 17:18:57,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:18:57,683 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 257 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:57,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 56 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 17:18:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2022-01-31 17:18:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.0190839694656488) internal successors, (267), 262 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:18:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 272 transitions. [2022-01-31 17:18:57,779 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 272 transitions. Word has length 261 [2022-01-31 17:18:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:57,779 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 272 transitions. [2022-01-31 17:18:57,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.1092436974789917) internal successors, (251), 118 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 272 transitions. [2022-01-31 17:18:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 17:18:57,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:57,780 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:57,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:18:57,780 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:57,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash -548918873, now seen corresponding path program 116 times [2022-01-31 17:18:57,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:57,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281964434] [2022-01-31 17:18:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:57,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:57,781 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:57,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:57,789 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:01,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:01,742 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:01,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281964434] [2022-01-31 17:19:01,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [281964434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:01,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:01,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:19:01,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675486827] [2022-01-31 17:19:01,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:01,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:19:01,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:01,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:19:01,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:19:01,745 INFO L87 Difference]: Start difference. First operand 268 states and 272 transitions. Second operand has 120 states, 120 states have (on average 2.1083333333333334) internal successors, (253), 119 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:06,716 INFO L93 Difference]: Finished difference Result 300 states and 308 transitions. [2022-01-31 17:19:06,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:19:06,716 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.1083333333333334) internal successors, (253), 119 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 17:19:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:06,717 INFO L225 Difference]: With dead ends: 300 [2022-01-31 17:19:06,717 INFO L226 Difference]: Without dead ends: 271 [2022-01-31 17:19:06,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:19:06,720 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 259 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:06,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 86 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:19:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-31 17:19:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2022-01-31 17:19:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 264 states have (on average 1.018939393939394) internal successors, (269), 264 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 274 transitions. [2022-01-31 17:19:06,814 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 274 transitions. Word has length 263 [2022-01-31 17:19:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:06,814 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 274 transitions. [2022-01-31 17:19:06,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.1083333333333334) internal successors, (253), 119 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 274 transitions. [2022-01-31 17:19:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 17:19:06,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:06,815 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:06,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:19:06,815 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:06,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:06,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1732847813, now seen corresponding path program 117 times [2022-01-31 17:19:06,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:06,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804488843] [2022-01-31 17:19:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:06,817 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:06,817 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:06,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:06,825 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:10,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:10,825 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 17:19:10,826 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:10,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804488843] [2022-01-31 17:19:10,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [804488843] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:10,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:10,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:19:10,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826451481] [2022-01-31 17:19:10,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:10,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:19:10,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:10,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:19:10,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:19:10,828 INFO L87 Difference]: Start difference. First operand 270 states and 274 transitions. Second operand has 121 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 120 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:15,763 INFO L93 Difference]: Finished difference Result 302 states and 310 transitions. [2022-01-31 17:19:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:19:15,764 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 120 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-01-31 17:19:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:15,764 INFO L225 Difference]: With dead ends: 302 [2022-01-31 17:19:15,764 INFO L226 Difference]: Without dead ends: 273 [2022-01-31 17:19:15,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:19:15,766 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 261 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:15,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 86 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:19:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-31 17:19:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2022-01-31 17:19:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.018796992481203) internal successors, (271), 266 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 276 transitions. [2022-01-31 17:19:15,850 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 276 transitions. Word has length 265 [2022-01-31 17:19:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:15,850 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 276 transitions. [2022-01-31 17:19:15,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.1074380165289255) internal successors, (255), 120 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 276 transitions. [2022-01-31 17:19:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:19:15,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:15,851 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:15,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:19:15,851 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:15,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:15,851 INFO L85 PathProgramCache]: Analyzing trace with hash -217655197, now seen corresponding path program 118 times [2022-01-31 17:19:15,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:15,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452243546] [2022-01-31 17:19:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:15,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:15,853 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:15,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:15,861 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:20,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:20,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:20,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452243546] [2022-01-31 17:19:20,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [452243546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:20,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:20,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:19:20,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33122434] [2022-01-31 17:19:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:20,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:19:20,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:19:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:19:20,086 INFO L87 Difference]: Start difference. First operand 272 states and 276 transitions. Second operand has 122 states, 122 states have (on average 2.1065573770491803) internal successors, (257), 121 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:25,058 INFO L93 Difference]: Finished difference Result 304 states and 312 transitions. [2022-01-31 17:19:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:19:25,059 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.1065573770491803) internal successors, (257), 121 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 17:19:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:25,059 INFO L225 Difference]: With dead ends: 304 [2022-01-31 17:19:25,059 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 17:19:25,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:19:25,062 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 263 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:25,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 66 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:19:25,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 17:19:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2022-01-31 17:19:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 268 states have (on average 1.0186567164179106) internal successors, (273), 268 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:25,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 278 transitions. [2022-01-31 17:19:25,156 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 278 transitions. Word has length 267 [2022-01-31 17:19:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:25,156 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 278 transitions. [2022-01-31 17:19:25,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.1065573770491803) internal successors, (257), 121 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 278 transitions. [2022-01-31 17:19:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-31 17:19:25,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:25,157 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:25,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:19:25,157 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:25,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:25,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2045306751, now seen corresponding path program 119 times [2022-01-31 17:19:25,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:25,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291192522] [2022-01-31 17:19:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:25,159 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:25,159 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:25,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:25,167 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:29,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:29,272 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 17:19:29,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:29,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291192522] [2022-01-31 17:19:29,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1291192522] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:29,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:29,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:19:29,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389806008] [2022-01-31 17:19:29,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:29,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:19:29,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:29,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:19:29,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:19:29,274 INFO L87 Difference]: Start difference. First operand 274 states and 278 transitions. Second operand has 123 states, 123 states have (on average 2.105691056910569) internal successors, (259), 122 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:34,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:34,390 INFO L93 Difference]: Finished difference Result 306 states and 314 transitions. [2022-01-31 17:19:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:19:34,391 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.105691056910569) internal successors, (259), 122 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-01-31 17:19:34,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:34,391 INFO L225 Difference]: With dead ends: 306 [2022-01-31 17:19:34,391 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 17:19:34,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:19:34,393 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 265 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:34,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 46 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 17:19:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 276. [2022-01-31 17:19:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 270 states have (on average 1.0185185185185186) internal successors, (275), 270 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-01-31 17:19:34,479 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 269 [2022-01-31 17:19:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:34,479 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-01-31 17:19:34,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.105691056910569) internal successors, (259), 122 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-01-31 17:19:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 17:19:34,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:34,480 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:34,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:19:34,480 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1776826081, now seen corresponding path program 120 times [2022-01-31 17:19:34,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:34,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706936790] [2022-01-31 17:19:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:34,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:34,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:34,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:34,495 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:38,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:38,643 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 17:19:38,644 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:38,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706936790] [2022-01-31 17:19:38,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [706936790] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:38,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:38,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:19:38,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013051597] [2022-01-31 17:19:38,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:38,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:19:38,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:38,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:19:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:19:38,646 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 124 states, 124 states have (on average 2.1048387096774195) internal successors, (261), 123 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:43,810 INFO L93 Difference]: Finished difference Result 308 states and 316 transitions. [2022-01-31 17:19:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:19:43,810 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.1048387096774195) internal successors, (261), 123 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-01-31 17:19:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:43,811 INFO L225 Difference]: With dead ends: 308 [2022-01-31 17:19:43,811 INFO L226 Difference]: Without dead ends: 279 [2022-01-31 17:19:43,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:19:43,825 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 267 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:43,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 61 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:19:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-31 17:19:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2022-01-31 17:19:43,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 272 states have (on average 1.0183823529411764) internal successors, (277), 272 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 282 transitions. [2022-01-31 17:19:43,916 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 282 transitions. Word has length 271 [2022-01-31 17:19:43,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:43,916 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 282 transitions. [2022-01-31 17:19:43,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.1048387096774195) internal successors, (261), 123 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 282 transitions. [2022-01-31 17:19:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 17:19:43,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:43,917 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:43,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:19:43,917 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1464939971, now seen corresponding path program 121 times [2022-01-31 17:19:43,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:43,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638829469] [2022-01-31 17:19:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:43,918 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:43,918 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:43,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:43,934 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:48,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:48,306 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 17:19:48,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:48,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638829469] [2022-01-31 17:19:48,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1638829469] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:48,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:48,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:19:48,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688453139] [2022-01-31 17:19:48,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:48,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:19:48,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:48,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:19:48,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:19:48,309 INFO L87 Difference]: Start difference. First operand 278 states and 282 transitions. Second operand has 125 states, 125 states have (on average 2.104) internal successors, (263), 124 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:53,685 INFO L93 Difference]: Finished difference Result 310 states and 318 transitions. [2022-01-31 17:19:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:19:53,685 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.104) internal successors, (263), 124 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2022-01-31 17:19:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:53,686 INFO L225 Difference]: With dead ends: 310 [2022-01-31 17:19:53,686 INFO L226 Difference]: Without dead ends: 281 [2022-01-31 17:19:53,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:19:53,688 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 269 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:53,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 46 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-31 17:19:53,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2022-01-31 17:19:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.0182481751824817) internal successors, (279), 274 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:19:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 284 transitions. [2022-01-31 17:19:53,804 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 284 transitions. Word has length 273 [2022-01-31 17:19:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:53,804 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 284 transitions. [2022-01-31 17:19:53,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.104) internal successors, (263), 124 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:53,804 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 284 transitions. [2022-01-31 17:19:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:19:53,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:53,805 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:53,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:19:53,805 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:53,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:53,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1904868315, now seen corresponding path program 122 times [2022-01-31 17:19:53,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:53,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051618875] [2022-01-31 17:19:53,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:53,806 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:53,806 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:53,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:53,814 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:58,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:58,155 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 17:19:58,155 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:58,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051618875] [2022-01-31 17:19:58,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051618875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:58,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:58,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:19:58,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172687810] [2022-01-31 17:19:58,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:58,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:19:58,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:58,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:19:58,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:19:58,158 INFO L87 Difference]: Start difference. First operand 280 states and 284 transitions. Second operand has 126 states, 126 states have (on average 2.1031746031746033) internal successors, (265), 125 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:03,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:03,475 INFO L93 Difference]: Finished difference Result 312 states and 320 transitions. [2022-01-31 17:20:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:20:03,476 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.1031746031746033) internal successors, (265), 125 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 17:20:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:03,476 INFO L225 Difference]: With dead ends: 312 [2022-01-31 17:20:03,476 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 17:20:03,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:20:03,479 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 271 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:03,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 46 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:03,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 17:20:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 282. [2022-01-31 17:20:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 276 states have (on average 1.0181159420289856) internal successors, (281), 276 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 286 transitions. [2022-01-31 17:20:03,569 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 286 transitions. Word has length 275 [2022-01-31 17:20:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:03,569 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 286 transitions. [2022-01-31 17:20:03,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.1031746031746033) internal successors, (265), 125 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 286 transitions. [2022-01-31 17:20:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 17:20:03,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:03,570 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:03,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:20:03,570 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1885289977, now seen corresponding path program 123 times [2022-01-31 17:20:03,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:03,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703012728] [2022-01-31 17:20:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:03,571 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:03,571 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:03,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:03,589 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:08,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:08,016 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 17:20:08,016 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:08,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703012728] [2022-01-31 17:20:08,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703012728] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:08,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:08,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:20:08,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838652060] [2022-01-31 17:20:08,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:08,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:20:08,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:08,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:20:08,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:20:08,018 INFO L87 Difference]: Start difference. First operand 282 states and 286 transitions. Second operand has 127 states, 127 states have (on average 2.1023622047244093) internal successors, (267), 126 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:13,445 INFO L93 Difference]: Finished difference Result 314 states and 322 transitions. [2022-01-31 17:20:13,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:20:13,446 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.1023622047244093) internal successors, (267), 126 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2022-01-31 17:20:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:13,446 INFO L225 Difference]: With dead ends: 314 [2022-01-31 17:20:13,446 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 17:20:13,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:20:13,449 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 273 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:13,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 51 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 17:20:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2022-01-31 17:20:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.0179856115107915) internal successors, (283), 278 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 288 transitions. [2022-01-31 17:20:13,554 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 288 transitions. Word has length 277 [2022-01-31 17:20:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:13,554 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 288 transitions. [2022-01-31 17:20:13,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.1023622047244093) internal successors, (267), 126 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 288 transitions. [2022-01-31 17:20:13,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 17:20:13,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:13,555 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:13,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:20:13,555 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash 250376343, now seen corresponding path program 124 times [2022-01-31 17:20:13,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:13,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75877804] [2022-01-31 17:20:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:13,557 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:13,557 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:13,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:13,568 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:18,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:18,172 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 17:20:18,172 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:18,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75877804] [2022-01-31 17:20:18,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [75877804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:18,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:18,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:20:18,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838884419] [2022-01-31 17:20:18,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:18,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:20:18,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:18,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:20:18,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:20:18,176 INFO L87 Difference]: Start difference. First operand 284 states and 288 transitions. Second operand has 128 states, 128 states have (on average 2.1015625) internal successors, (269), 127 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:23,638 INFO L93 Difference]: Finished difference Result 316 states and 324 transitions. [2022-01-31 17:20:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:20:23,639 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.1015625) internal successors, (269), 127 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-01-31 17:20:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:23,640 INFO L225 Difference]: With dead ends: 316 [2022-01-31 17:20:23,640 INFO L226 Difference]: Without dead ends: 287 [2022-01-31 17:20:23,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:20:23,642 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 275 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:23,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 76 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:20:23,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-31 17:20:23,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2022-01-31 17:20:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.0178571428571428) internal successors, (285), 280 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 290 transitions. [2022-01-31 17:20:23,755 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 290 transitions. Word has length 279 [2022-01-31 17:20:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:23,756 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 290 transitions. [2022-01-31 17:20:23,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.1015625) internal successors, (269), 127 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 290 transitions. [2022-01-31 17:20:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 17:20:23,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:23,756 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:23,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:20:23,757 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:23,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:23,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1056404405, now seen corresponding path program 125 times [2022-01-31 17:20:23,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:23,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696685593] [2022-01-31 17:20:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:23,758 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:23,758 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:23,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:23,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:28,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:28,364 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 17:20:28,364 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:28,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696685593] [2022-01-31 17:20:28,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [696685593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:28,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:28,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:20:28,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992248592] [2022-01-31 17:20:28,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:28,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:20:28,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:28,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:20:28,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:20:28,366 INFO L87 Difference]: Start difference. First operand 286 states and 290 transitions. Second operand has 129 states, 129 states have (on average 2.10077519379845) internal successors, (271), 128 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:33,988 INFO L93 Difference]: Finished difference Result 318 states and 326 transitions. [2022-01-31 17:20:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:20:33,988 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.10077519379845) internal successors, (271), 128 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-01-31 17:20:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:33,989 INFO L225 Difference]: With dead ends: 318 [2022-01-31 17:20:33,989 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 17:20:33,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:20:33,991 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 277 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:33,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 56 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:33,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 17:20:34,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2022-01-31 17:20:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.0177304964539007) internal successors, (287), 282 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 292 transitions. [2022-01-31 17:20:34,086 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 292 transitions. Word has length 281 [2022-01-31 17:20:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:34,086 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 292 transitions. [2022-01-31 17:20:34,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.10077519379845) internal successors, (271), 128 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 292 transitions. [2022-01-31 17:20:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 17:20:34,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:34,087 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:34,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:20:34,087 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:34,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:34,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1739708589, now seen corresponding path program 126 times [2022-01-31 17:20:34,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:34,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972476410] [2022-01-31 17:20:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:34,089 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:34,089 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:34,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:34,098 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:38,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:38,723 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 17:20:38,723 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:38,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972476410] [2022-01-31 17:20:38,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [972476410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:38,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:38,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:20:38,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554077672] [2022-01-31 17:20:38,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:38,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:20:38,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:38,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:20:38,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:20:38,725 INFO L87 Difference]: Start difference. First operand 288 states and 292 transitions. Second operand has 130 states, 130 states have (on average 2.1) internal successors, (273), 129 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:44,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:44,369 INFO L93 Difference]: Finished difference Result 320 states and 328 transitions. [2022-01-31 17:20:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:20:44,370 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.1) internal successors, (273), 129 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-01-31 17:20:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:44,370 INFO L225 Difference]: With dead ends: 320 [2022-01-31 17:20:44,370 INFO L226 Difference]: Without dead ends: 291 [2022-01-31 17:20:44,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:20:44,373 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 279 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:44,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 66 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:20:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-01-31 17:20:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2022-01-31 17:20:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 284 states have (on average 1.017605633802817) internal successors, (289), 284 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 294 transitions. [2022-01-31 17:20:44,485 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 294 transitions. Word has length 283 [2022-01-31 17:20:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:44,486 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 294 transitions. [2022-01-31 17:20:44,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.1) internal successors, (273), 129 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 294 transitions. [2022-01-31 17:20:44,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 17:20:44,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:44,487 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:44,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:20:44,487 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash -154768527, now seen corresponding path program 127 times [2022-01-31 17:20:44,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:44,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615500907] [2022-01-31 17:20:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:44,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:44,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:44,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:44,498 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:49,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:49,203 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 17:20:49,203 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:49,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615500907] [2022-01-31 17:20:49,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [615500907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:49,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:49,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:20:49,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734427149] [2022-01-31 17:20:49,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:49,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:20:49,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:20:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:20:49,206 INFO L87 Difference]: Start difference. First operand 290 states and 294 transitions. Second operand has 131 states, 131 states have (on average 2.099236641221374) internal successors, (275), 130 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:54,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:54,934 INFO L93 Difference]: Finished difference Result 322 states and 330 transitions. [2022-01-31 17:20:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:20:54,934 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.099236641221374) internal successors, (275), 130 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2022-01-31 17:20:54,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:54,935 INFO L225 Difference]: With dead ends: 322 [2022-01-31 17:20:54,935 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 17:20:54,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:20:54,937 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 281 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:54,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 66 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:20:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 17:20:55,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 292. [2022-01-31 17:20:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.0174825174825175) internal successors, (291), 286 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:20:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 296 transitions. [2022-01-31 17:20:55,036 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 296 transitions. Word has length 285 [2022-01-31 17:20:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:55,036 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 296 transitions. [2022-01-31 17:20:55,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.099236641221374) internal successors, (275), 130 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 296 transitions. [2022-01-31 17:20:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 17:20:55,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:55,037 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:55,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:20:55,037 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:55,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1740759025, now seen corresponding path program 128 times [2022-01-31 17:20:55,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:55,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574544368] [2022-01-31 17:20:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:55,039 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:55,039 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:55,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:55,049 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:59,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:59,798 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:59,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574544368] [2022-01-31 17:20:59,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [574544368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:59,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:59,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:20:59,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426950150] [2022-01-31 17:20:59,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:59,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:20:59,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:20:59,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:20:59,801 INFO L87 Difference]: Start difference. First operand 292 states and 296 transitions. Second operand has 132 states, 132 states have (on average 2.0984848484848486) internal successors, (277), 131 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:05,665 INFO L93 Difference]: Finished difference Result 324 states and 332 transitions. [2022-01-31 17:21:05,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:21:05,666 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0984848484848486) internal successors, (277), 131 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-01-31 17:21:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:05,666 INFO L225 Difference]: With dead ends: 324 [2022-01-31 17:21:05,666 INFO L226 Difference]: Without dead ends: 295 [2022-01-31 17:21:05,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:21:05,669 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 283 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:05,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 46 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:21:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-31 17:21:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2022-01-31 17:21:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 288 states have (on average 1.0173611111111112) internal successors, (293), 288 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:05,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 298 transitions. [2022-01-31 17:21:05,768 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 298 transitions. Word has length 287 [2022-01-31 17:21:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:05,769 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 298 transitions. [2022-01-31 17:21:05,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.0984848484848486) internal successors, (277), 131 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:05,769 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 298 transitions. [2022-01-31 17:21:05,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-31 17:21:05,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:05,770 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:05,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:21:05,770 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:05,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:05,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1164237523, now seen corresponding path program 129 times [2022-01-31 17:21:05,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:05,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513227812] [2022-01-31 17:21:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:05,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:05,771 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:05,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:05,781 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:10,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:10,642 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 17:21:10,642 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:10,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513227812] [2022-01-31 17:21:10,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1513227812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:10,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:10,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:21:10,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016903794] [2022-01-31 17:21:10,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:10,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:21:10,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:10,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:21:10,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:21:10,644 INFO L87 Difference]: Start difference. First operand 294 states and 298 transitions. Second operand has 133 states, 133 states have (on average 2.0977443609022557) internal successors, (279), 132 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:16,534 INFO L93 Difference]: Finished difference Result 326 states and 334 transitions. [2022-01-31 17:21:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:21:16,534 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0977443609022557) internal successors, (279), 132 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2022-01-31 17:21:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:16,535 INFO L225 Difference]: With dead ends: 326 [2022-01-31 17:21:16,535 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 17:21:16,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:21:16,538 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 285 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:16,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 76 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:21:16,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 17:21:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2022-01-31 17:21:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.0172413793103448) internal successors, (295), 290 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 300 transitions. [2022-01-31 17:21:16,652 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 300 transitions. Word has length 289 [2022-01-31 17:21:16,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:16,652 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 300 transitions. [2022-01-31 17:21:16,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0977443609022557) internal successors, (279), 132 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 300 transitions. [2022-01-31 17:21:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:21:16,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:16,653 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:16,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:21:16,653 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:16,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1177855285, now seen corresponding path program 130 times [2022-01-31 17:21:16,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:16,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108899554] [2022-01-31 17:21:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:16,654 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:16,654 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:16,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:16,664 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:21,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:21,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:21,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108899554] [2022-01-31 17:21:21,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [108899554] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:21,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:21,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:21:21,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516338038] [2022-01-31 17:21:21,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:21,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:21:21,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:21,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:21:21,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:21:21,621 INFO L87 Difference]: Start difference. First operand 296 states and 300 transitions. Second operand has 134 states, 134 states have (on average 2.0970149253731343) internal successors, (281), 133 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:27,596 INFO L93 Difference]: Finished difference Result 328 states and 336 transitions. [2022-01-31 17:21:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:21:27,596 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0970149253731343) internal successors, (281), 133 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 17:21:27,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:27,597 INFO L225 Difference]: With dead ends: 328 [2022-01-31 17:21:27,597 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 17:21:27,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:21:27,600 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 287 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:27,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 81 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:21:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 17:21:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2022-01-31 17:21:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 292 states have (on average 1.0171232876712328) internal successors, (297), 292 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 302 transitions. [2022-01-31 17:21:27,714 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 302 transitions. Word has length 291 [2022-01-31 17:21:27,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:27,714 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 302 transitions. [2022-01-31 17:21:27,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0970149253731343) internal successors, (281), 133 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:27,714 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 302 transitions. [2022-01-31 17:21:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-31 17:21:27,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:27,715 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:27,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:21:27,715 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:27,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1379622679, now seen corresponding path program 131 times [2022-01-31 17:21:27,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:27,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188744950] [2022-01-31 17:21:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:27,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:27,716 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:27,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:27,727 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:32,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:32,735 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 17:21:32,735 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:32,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188744950] [2022-01-31 17:21:32,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [188744950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:32,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:32,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:21:32,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511282116] [2022-01-31 17:21:32,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:32,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:21:32,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:32,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:21:32,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:21:32,737 INFO L87 Difference]: Start difference. First operand 298 states and 302 transitions. Second operand has 135 states, 135 states have (on average 2.096296296296296) internal successors, (283), 134 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:38,875 INFO L93 Difference]: Finished difference Result 330 states and 338 transitions. [2022-01-31 17:21:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:21:38,875 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.096296296296296) internal successors, (283), 134 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 293 [2022-01-31 17:21:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:38,876 INFO L225 Difference]: With dead ends: 330 [2022-01-31 17:21:38,876 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 17:21:38,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:21:38,879 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 289 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:38,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 66 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:21:38,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 17:21:38,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 300. [2022-01-31 17:21:38,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 294 states have (on average 1.0170068027210883) internal successors, (299), 294 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:38,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 304 transitions. [2022-01-31 17:21:38,995 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 304 transitions. Word has length 293 [2022-01-31 17:21:38,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:38,995 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 304 transitions. [2022-01-31 17:21:38,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.096296296296296) internal successors, (283), 134 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 304 transitions. [2022-01-31 17:21:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 17:21:38,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:38,996 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:38,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:21:38,996 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:38,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2004559993, now seen corresponding path program 132 times [2022-01-31 17:21:38,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:38,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991444605] [2022-01-31 17:21:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:38,997 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:38,998 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:38,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:39,008 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:44,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:44,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:44,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991444605] [2022-01-31 17:21:44,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991444605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:44,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:44,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:21:44,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925634364] [2022-01-31 17:21:44,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:44,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:21:44,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:44,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:21:44,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:21:44,091 INFO L87 Difference]: Start difference. First operand 300 states and 304 transitions. Second operand has 136 states, 136 states have (on average 2.0955882352941178) internal successors, (285), 135 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:50,380 INFO L93 Difference]: Finished difference Result 332 states and 340 transitions. [2022-01-31 17:21:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:21:50,381 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0955882352941178) internal successors, (285), 135 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2022-01-31 17:21:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:50,381 INFO L225 Difference]: With dead ends: 332 [2022-01-31 17:21:50,381 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 17:21:50,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:21:50,385 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 291 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:50,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 51 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:21:50,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 17:21:50,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2022-01-31 17:21:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 296 states have (on average 1.0168918918918919) internal successors, (301), 296 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:21:50,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 306 transitions. [2022-01-31 17:21:50,503 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 306 transitions. Word has length 295 [2022-01-31 17:21:50,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:50,503 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 306 transitions. [2022-01-31 17:21:50,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0955882352941178) internal successors, (285), 135 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:50,503 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 306 transitions. [2022-01-31 17:21:50,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-31 17:21:50,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:50,504 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:50,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:21:50,504 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:50,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:50,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1273897307, now seen corresponding path program 133 times [2022-01-31 17:21:50,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:50,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103372384] [2022-01-31 17:21:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:50,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:50,505 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:50,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:50,516 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:55,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:55,763 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 17:21:55,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:55,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103372384] [2022-01-31 17:21:55,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [103372384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:55,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:55,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:21:55,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245129699] [2022-01-31 17:21:55,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:55,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:21:55,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:55,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:21:55,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:21:55,766 INFO L87 Difference]: Start difference. First operand 302 states and 306 transitions. Second operand has 137 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 136 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:02,176 INFO L93 Difference]: Finished difference Result 334 states and 342 transitions. [2022-01-31 17:22:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:22:02,176 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 136 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2022-01-31 17:22:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:02,177 INFO L225 Difference]: With dead ends: 334 [2022-01-31 17:22:02,177 INFO L226 Difference]: Without dead ends: 305 [2022-01-31 17:22:02,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:22:02,180 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 293 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:02,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 71 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:22:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-01-31 17:22:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2022-01-31 17:22:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.016778523489933) internal successors, (303), 298 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:22:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 308 transitions. [2022-01-31 17:22:02,320 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 308 transitions. Word has length 297 [2022-01-31 17:22:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:02,320 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 308 transitions. [2022-01-31 17:22:02,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 136 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 308 transitions. [2022-01-31 17:22:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 17:22:02,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:02,321 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:02,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 17:22:02,321 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:02,322 INFO L85 PathProgramCache]: Analyzing trace with hash 813274691, now seen corresponding path program 134 times [2022-01-31 17:22:02,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:02,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928962569] [2022-01-31 17:22:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:02,323 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:02,323 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:02,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:02,333 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:07,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:22:07,532 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:07,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928962569] [2022-01-31 17:22:07,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928962569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:07,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:07,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 17:22:07,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024469987] [2022-01-31 17:22:07,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:07,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 17:22:07,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:07,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 17:22:07,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:22:07,535 INFO L87 Difference]: Start difference. First operand 304 states and 308 transitions. Second operand has 138 states, 138 states have (on average 2.0942028985507246) internal successors, (289), 137 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:13,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:13,827 INFO L93 Difference]: Finished difference Result 336 states and 344 transitions. [2022-01-31 17:22:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 17:22:13,827 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0942028985507246) internal successors, (289), 137 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 17:22:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:13,827 INFO L225 Difference]: With dead ends: 336 [2022-01-31 17:22:13,828 INFO L226 Difference]: Without dead ends: 307 [2022-01-31 17:22:13,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 17:22:13,830 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 295 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:13,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 61 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:22:13,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-31 17:22:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2022-01-31 17:22:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 300 states have (on average 1.0166666666666666) internal successors, (305), 300 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:22:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 310 transitions. [2022-01-31 17:22:13,942 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 310 transitions. Word has length 299 [2022-01-31 17:22:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:13,942 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 310 transitions. [2022-01-31 17:22:13,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0942028985507246) internal successors, (289), 137 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 310 transitions. [2022-01-31 17:22:13,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-31 17:22:13,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:13,943 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:13,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 17:22:13,943 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash 835837537, now seen corresponding path program 135 times [2022-01-31 17:22:13,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:13,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115167219] [2022-01-31 17:22:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:13,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:13,944 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:13,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:13,955 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:19,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:19,229 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 17:22:19,229 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:19,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115167219] [2022-01-31 17:22:19,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115167219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:19,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:19,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 17:22:19,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989575658] [2022-01-31 17:22:19,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:19,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 17:22:19,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:19,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 17:22:19,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:22:19,232 INFO L87 Difference]: Start difference. First operand 306 states and 310 transitions. Second operand has 139 states, 139 states have (on average 2.093525179856115) internal successors, (291), 138 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:25,622 INFO L93 Difference]: Finished difference Result 338 states and 346 transitions. [2022-01-31 17:22:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 17:22:25,623 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.093525179856115) internal successors, (291), 138 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 301 [2022-01-31 17:22:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:25,623 INFO L225 Difference]: With dead ends: 338 [2022-01-31 17:22:25,623 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 17:22:25,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 17:22:25,626 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 297 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:25,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 61 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:22:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 17:22:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2022-01-31 17:22:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 302 states have (on average 1.0165562913907285) internal successors, (307), 302 states have internal predecessors, (307), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:22:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 312 transitions. [2022-01-31 17:22:25,740 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 312 transitions. Word has length 301 [2022-01-31 17:22:25,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:25,740 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 312 transitions. [2022-01-31 17:22:25,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.093525179856115) internal successors, (291), 138 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 312 transitions. [2022-01-31 17:22:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 17:22:25,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:25,741 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:25,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 17:22:25,741 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:25,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:25,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1043896063, now seen corresponding path program 136 times [2022-01-31 17:22:25,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:25,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018113170] [2022-01-31 17:22:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:25,743 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:25,743 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:25,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:25,762 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:31,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:31,065 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 17:22:31,066 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:31,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018113170] [2022-01-31 17:22:31,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1018113170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:31,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:31,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 17:22:31,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832329719] [2022-01-31 17:22:31,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:31,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 17:22:31,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:31,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 17:22:31,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 17:22:31,070 INFO L87 Difference]: Start difference. First operand 308 states and 312 transitions. Second operand has 140 states, 140 states have (on average 2.092857142857143) internal successors, (293), 139 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:37,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:37,664 INFO L93 Difference]: Finished difference Result 340 states and 348 transitions. [2022-01-31 17:22:37,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 17:22:37,664 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.092857142857143) internal successors, (293), 139 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2022-01-31 17:22:37,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:37,665 INFO L225 Difference]: With dead ends: 340 [2022-01-31 17:22:37,665 INFO L226 Difference]: Without dead ends: 311 [2022-01-31 17:22:37,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 17:22:37,668 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 299 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:37,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 46 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:22:37,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-31 17:22:37,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2022-01-31 17:22:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 304 states have (on average 1.0164473684210527) internal successors, (309), 304 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:22:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 314 transitions. [2022-01-31 17:22:37,796 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 314 transitions. Word has length 303 [2022-01-31 17:22:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:37,797 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 314 transitions. [2022-01-31 17:22:37,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.092857142857143) internal successors, (293), 139 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 314 transitions. [2022-01-31 17:22:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-31 17:22:37,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:37,798 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:37,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 17:22:37,798 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:37,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:37,798 INFO L85 PathProgramCache]: Analyzing trace with hash -875323363, now seen corresponding path program 137 times [2022-01-31 17:22:37,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:37,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898354096] [2022-01-31 17:22:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:37,799 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:37,799 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:37,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:37,810 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:43,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:43,254 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 17:22:43,254 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:43,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898354096] [2022-01-31 17:22:43,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1898354096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:43,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:43,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 17:22:43,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953392946] [2022-01-31 17:22:43,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:43,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 17:22:43,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:43,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 17:22:43,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:22:43,256 INFO L87 Difference]: Start difference. First operand 310 states and 314 transitions. Second operand has 141 states, 141 states have (on average 2.0921985815602837) internal successors, (295), 140 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:49,970 INFO L93 Difference]: Finished difference Result 342 states and 350 transitions. [2022-01-31 17:22:49,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 17:22:49,971 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.0921985815602837) internal successors, (295), 140 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 305 [2022-01-31 17:22:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:49,971 INFO L225 Difference]: With dead ends: 342 [2022-01-31 17:22:49,971 INFO L226 Difference]: Without dead ends: 313 [2022-01-31 17:22:49,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9590 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 17:22:49,974 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 301 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:49,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 46 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:22:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-31 17:22:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 312. [2022-01-31 17:22:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 306 states have (on average 1.0163398692810457) internal successors, (311), 306 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:22:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 316 transitions. [2022-01-31 17:22:50,094 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 316 transitions. Word has length 305 [2022-01-31 17:22:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:50,094 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 316 transitions. [2022-01-31 17:22:50,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.0921985815602837) internal successors, (295), 140 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 316 transitions. [2022-01-31 17:22:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 17:22:50,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:50,095 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:50,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 17:22:50,095 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:50,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1590745531, now seen corresponding path program 138 times [2022-01-31 17:22:50,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:50,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745659211] [2022-01-31 17:22:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:50,097 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:50,097 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:50,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:50,107 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:55,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:55,639 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 17:22:55,640 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:55,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745659211] [2022-01-31 17:22:55,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [745659211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:55,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:55,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 17:22:55,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388733581] [2022-01-31 17:22:55,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:55,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 17:22:55,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:55,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 17:22:55,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 17:22:55,643 INFO L87 Difference]: Start difference. First operand 312 states and 316 transitions. Second operand has 142 states, 142 states have (on average 2.091549295774648) internal successors, (297), 141 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:02,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:02,382 INFO L93 Difference]: Finished difference Result 344 states and 352 transitions. [2022-01-31 17:23:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 17:23:02,383 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.091549295774648) internal successors, (297), 141 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 307 [2022-01-31 17:23:02,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:02,383 INFO L225 Difference]: With dead ends: 344 [2022-01-31 17:23:02,383 INFO L226 Difference]: Without dead ends: 315 [2022-01-31 17:23:02,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=29610, Invalid=49070, Unknown=0, NotChecked=0, Total=78680 [2022-01-31 17:23:02,387 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 303 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:02,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 56 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:23:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-01-31 17:23:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2022-01-31 17:23:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 308 states have (on average 1.0162337662337662) internal successors, (313), 308 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:23:02,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 318 transitions. [2022-01-31 17:23:02,527 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 318 transitions. Word has length 307 [2022-01-31 17:23:02,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:02,528 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 318 transitions. [2022-01-31 17:23:02,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.091549295774648) internal successors, (297), 141 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:02,528 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 318 transitions. [2022-01-31 17:23:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-01-31 17:23:02,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:02,529 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:02,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 17:23:02,529 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:02,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:02,529 INFO L85 PathProgramCache]: Analyzing trace with hash 661005273, now seen corresponding path program 139 times [2022-01-31 17:23:02,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:02,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554925084] [2022-01-31 17:23:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:02,530 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:02,530 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:02,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:02,541 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:08,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:08,174 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 17:23:08,174 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554925084] [2022-01-31 17:23:08,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [554925084] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:08,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:08,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 17:23:08,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474560510] [2022-01-31 17:23:08,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:08,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 17:23:08,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:08,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 17:23:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:23:08,177 INFO L87 Difference]: Start difference. First operand 314 states and 318 transitions. Second operand has 143 states, 143 states have (on average 2.090909090909091) internal successors, (299), 142 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:15,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:15,012 INFO L93 Difference]: Finished difference Result 346 states and 354 transitions. [2022-01-31 17:23:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 17:23:15,012 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.090909090909091) internal successors, (299), 142 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 309 [2022-01-31 17:23:15,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:15,013 INFO L225 Difference]: With dead ends: 346 [2022-01-31 17:23:15,013 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 17:23:15,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9869 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=30033, Invalid=49773, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 17:23:15,016 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 305 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:15,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 61 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:23:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 17:23:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2022-01-31 17:23:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 310 states have (on average 1.0161290322580645) internal successors, (315), 310 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:23:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 320 transitions. [2022-01-31 17:23:15,150 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 320 transitions. Word has length 309 [2022-01-31 17:23:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:15,150 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 320 transitions. [2022-01-31 17:23:15,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.090909090909091) internal successors, (299), 142 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 320 transitions. [2022-01-31 17:23:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 17:23:15,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:15,151 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:15,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 17:23:15,152 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:15,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:15,152 INFO L85 PathProgramCache]: Analyzing trace with hash 533814903, now seen corresponding path program 140 times [2022-01-31 17:23:15,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:15,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892850279] [2022-01-31 17:23:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:15,153 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:15,153 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:15,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:15,165 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:20,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:20,884 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 17:23:20,884 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:20,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892850279] [2022-01-31 17:23:20,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892850279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:20,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:20,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 17:23:20,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655719719] [2022-01-31 17:23:20,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:20,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 17:23:20,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:20,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 17:23:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 17:23:20,887 INFO L87 Difference]: Start difference. First operand 316 states and 320 transitions. Second operand has 144 states, 144 states have (on average 2.0902777777777777) internal successors, (301), 143 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:27,787 INFO L93 Difference]: Finished difference Result 348 states and 356 transitions. [2022-01-31 17:23:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 17:23:27,788 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0902777777777777) internal successors, (301), 143 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-01-31 17:23:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:27,788 INFO L225 Difference]: With dead ends: 348 [2022-01-31 17:23:27,788 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 17:23:27,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10010 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=30459, Invalid=50481, Unknown=0, NotChecked=0, Total=80940 [2022-01-31 17:23:27,791 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 307 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:27,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 46 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:23:27,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 17:23:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 318. [2022-01-31 17:23:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 312 states have (on average 1.016025641025641) internal successors, (317), 312 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:23:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 322 transitions. [2022-01-31 17:23:27,910 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 322 transitions. Word has length 311 [2022-01-31 17:23:27,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:27,911 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 322 transitions. [2022-01-31 17:23:27,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0902777777777777) internal successors, (301), 143 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 322 transitions. [2022-01-31 17:23:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-01-31 17:23:27,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:27,912 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:27,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 17:23:27,912 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:27,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1437046379, now seen corresponding path program 141 times [2022-01-31 17:23:27,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:27,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905893602] [2022-01-31 17:23:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:27,913 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:27,913 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:27,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:27,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:33,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:33,709 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 17:23:33,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:33,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905893602] [2022-01-31 17:23:33,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1905893602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:33,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:33,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 17:23:33,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767840043] [2022-01-31 17:23:33,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:33,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 17:23:33,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 17:23:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:23:33,711 INFO L87 Difference]: Start difference. First operand 318 states and 322 transitions. Second operand has 145 states, 145 states have (on average 2.089655172413793) internal successors, (303), 144 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:40,671 INFO L93 Difference]: Finished difference Result 350 states and 358 transitions. [2022-01-31 17:23:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 17:23:40,671 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.089655172413793) internal successors, (303), 144 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-01-31 17:23:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:40,672 INFO L225 Difference]: With dead ends: 350 [2022-01-31 17:23:40,672 INFO L226 Difference]: Without dead ends: 321 [2022-01-31 17:23:40,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10152 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=30888, Invalid=51194, Unknown=0, NotChecked=0, Total=82082 [2022-01-31 17:23:40,676 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 309 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:40,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 71 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:23:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-01-31 17:23:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2022-01-31 17:23:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 314 states have (on average 1.015923566878981) internal successors, (319), 314 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:23:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 324 transitions. [2022-01-31 17:23:40,817 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 324 transitions. Word has length 313 [2022-01-31 17:23:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:40,817 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 324 transitions. [2022-01-31 17:23:40,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.089655172413793) internal successors, (303), 144 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 324 transitions. [2022-01-31 17:23:40,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:23:40,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:40,818 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:40,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 17:23:40,818 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1354160845, now seen corresponding path program 142 times [2022-01-31 17:23:40,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:40,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067470670] [2022-01-31 17:23:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:40,819 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:40,820 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:40,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:40,831 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:46,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:46,663 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 17:23:46,663 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:46,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067470670] [2022-01-31 17:23:46,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2067470670] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:46,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:46,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 17:23:46,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34733429] [2022-01-31 17:23:46,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:46,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 17:23:46,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:46,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 17:23:46,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 17:23:46,665 INFO L87 Difference]: Start difference. First operand 320 states and 324 transitions. Second operand has 146 states, 146 states have (on average 2.089041095890411) internal successors, (305), 145 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:53,797 INFO L93 Difference]: Finished difference Result 352 states and 360 transitions. [2022-01-31 17:23:53,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 17:23:53,797 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.089041095890411) internal successors, (305), 145 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 17:23:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:53,798 INFO L225 Difference]: With dead ends: 352 [2022-01-31 17:23:53,798 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 17:23:53,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10295 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=31320, Invalid=51912, Unknown=0, NotChecked=0, Total=83232 [2022-01-31 17:23:53,801 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 311 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:53,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 56 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:23:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 17:23:53,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2022-01-31 17:23:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 316 states have (on average 1.0158227848101267) internal successors, (321), 316 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:23:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 326 transitions. [2022-01-31 17:23:53,932 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 326 transitions. Word has length 315 [2022-01-31 17:23:53,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:53,932 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 326 transitions. [2022-01-31 17:23:53,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.089041095890411) internal successors, (305), 145 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 326 transitions. [2022-01-31 17:23:53,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-01-31 17:23:53,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:53,933 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:53,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 17:23:53,933 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:53,933 INFO L85 PathProgramCache]: Analyzing trace with hash 989426001, now seen corresponding path program 143 times [2022-01-31 17:23:53,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:53,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551158203] [2022-01-31 17:23:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:53,934 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:53,934 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:53,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:53,945 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:59,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:59,953 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 17:23:59,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:59,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551158203] [2022-01-31 17:23:59,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1551158203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:59,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:59,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-01-31 17:23:59,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572788381] [2022-01-31 17:23:59,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:59,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 17:23:59,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:59,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 17:23:59,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:23:59,956 INFO L87 Difference]: Start difference. First operand 322 states and 326 transitions. Second operand has 147 states, 147 states have (on average 2.0884353741496597) internal successors, (307), 146 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)