/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:38:27,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:38:27,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:38:27,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 20:38:27,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 20:38:27,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 20:38:27,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 20:38:27,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 20:38:27,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 20:38:27,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 20:38:27,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 20:38:27,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 20:38:27,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 20:38:27,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 20:38:27,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 20:38:27,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 20:38:27,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 20:38:27,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 20:38:27,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 20:38:27,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 20:38:27,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 20:38:27,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 20:38:27,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 20:38:27,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 20:38:27,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 20:38:27,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 20:38:27,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 20:38:27,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 20:38:27,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 20:38:27,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 20:38:27,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 20:38:27,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 20:38:27,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 20:38:27,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 20:38:27,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 20:38:27,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 20:38:27,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 20:38:27,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 20:38:27,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:38:27,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:38:27,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:38:27,162 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 20:38:27,173 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:38:27,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:38:27,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:38:27,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:38:27,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:38:27,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:38:27,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:38:27,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:38:27,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:38:27,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:38:27,176 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:38:27,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:38:27,177 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:38:27,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:38:27,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:38:27,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:38:27,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:38:27,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:38:27,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:38:27,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:38:27,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:38:27,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:38:27,178 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:38:27,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:38:27,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:38:27,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:38:27,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:38:27,400 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:38:27,400 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:38:27,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2022-01-31 20:38:27,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8563838/c9fc460e00494f7c92bb0b05a5799a7d/FLAG7400b0ec3 [2022-01-31 20:38:27,793 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:38:27,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2022-01-31 20:38:27,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8563838/c9fc460e00494f7c92bb0b05a5799a7d/FLAG7400b0ec3 [2022-01-31 20:38:28,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8563838/c9fc460e00494f7c92bb0b05a5799a7d [2022-01-31 20:38:28,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:38:28,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:38:28,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:38:28,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:38:28,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:38:28,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:38:28" (1/1) ... [2022-01-31 20:38:28,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@129d8519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:28, skipping insertion in model container [2022-01-31 20:38:28,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:38:28" (1/1) ... [2022-01-31 20:38:28,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:38:28,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:38:28,393 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i[896,909] [2022-01-31 20:38:28,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:38:28,425 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:38:28,441 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i[896,909] [2022-01-31 20:38:28,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:38:28,477 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:38:28,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:28 WrapperNode [2022-01-31 20:38:28,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:38:28,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:38:28,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:38:28,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:38:28,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:28" (1/1) ... [2022-01-31 20:38:28,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:28" (1/1) ... [2022-01-31 20:38:28,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:28" (1/1) ... [2022-01-31 20:38:28,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:28" (1/1) ... [2022-01-31 20:38:28,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:28" (1/1) ... [2022-01-31 20:38:28,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:28" (1/1) ... [2022-01-31 20:38:28,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:28" (1/1) ... [2022-01-31 20:38:28,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:38:28,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:38:28,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:38:28,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:38:28,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:28" (1/1) ... [2022-01-31 20:38:28,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:38:28,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:38:28,560 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 20:38:28,591 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 20:38:28,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:38:28,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:38:28,616 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:38:28,616 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 20:38:28,617 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:38:28,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:38:28,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:38:28,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:38:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 20:38:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 20:38:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:38:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:38:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 20:38:28,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:38:28,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-01-31 20:38:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:38:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 20:38:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:38:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:38:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:38:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:38:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:38:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:38:28,715 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:38:28,716 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:38:28,877 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:38:28,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:38:28,883 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 20:38:28,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:38:28 BoogieIcfgContainer [2022-01-31 20:38:28,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:38:28,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:38:28,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:38:28,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:38:28,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:38:28" (1/3) ... [2022-01-31 20:38:28,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54db7244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:38:28, skipping insertion in model container [2022-01-31 20:38:28,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:38:28" (2/3) ... [2022-01-31 20:38:28,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54db7244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:38:28, skipping insertion in model container [2022-01-31 20:38:28,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:38:28" (3/3) ... [2022-01-31 20:38:28,890 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2022-01-31 20:38:28,893 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:38:28,893 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:38:28,922 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:38:28,927 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 20:38:28,927 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:38:28,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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 20:38:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 20:38:28,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:28,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:28,947 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash 739829093, now seen corresponding path program 1 times [2022-01-31 20:38:28,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:28,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089406027] [2022-01-31 20:38:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:28,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:28,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:29,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:29,122 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 20:38:29,123 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:29,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089406027] [2022-01-31 20:38:29,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089406027] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:29,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:29,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:38:29,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880087935] [2022-01-31 20:38:29,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:29,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 20:38:29,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 20:38:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 20:38:29,155 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:29,293 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2022-01-31 20:38:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 20:38:29,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 20:38:29,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:29,301 INFO L225 Difference]: With dead ends: 73 [2022-01-31 20:38:29,301 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 20:38:29,303 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 20:38:29,306 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:29,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 45 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 20:38:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-01-31 20:38:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-01-31 20:38:29,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2022-01-31 20:38:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:29,336 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-01-31 20:38:29,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-01-31 20:38:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 20:38:29,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:29,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:29,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:38:29,338 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:29,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1075962823, now seen corresponding path program 1 times [2022-01-31 20:38:29,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:29,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927782116] [2022-01-31 20:38:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:29,353 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:29,354 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:29,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:29,356 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:29,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:29,458 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 20:38:29,459 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:29,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927782116] [2022-01-31 20:38:29,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927782116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:29,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:29,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:38:29,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109250372] [2022-01-31 20:38:29,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:29,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:38:29,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:29,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:38:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:38:29,461 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:29,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:29,573 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2022-01-31 20:38:29,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 20:38:29,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 20:38:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:29,576 INFO L225 Difference]: With dead ends: 65 [2022-01-31 20:38:29,576 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 20:38:29,579 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 20:38:29,581 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:29,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 32 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:29,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 20:38:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2022-01-31 20:38:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-01-31 20:38:29,591 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2022-01-31 20:38:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:29,592 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-01-31 20:38:29,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:29,592 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-01-31 20:38:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 20:38:29,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:29,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:29,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:38:29,593 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:29,594 INFO L85 PathProgramCache]: Analyzing trace with hash 875420793, now seen corresponding path program 2 times [2022-01-31 20:38:29,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:29,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362900817] [2022-01-31 20:38:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:29,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:29,597 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:29,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:29,598 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:29,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:38:29,689 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:29,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362900817] [2022-01-31 20:38:29,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [362900817] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:29,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:29,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:38:29,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129778900] [2022-01-31 20:38:29,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:29,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:38:29,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:29,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:38:29,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:38:29,691 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:29,789 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2022-01-31 20:38:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:38:29,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 20:38:29,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:29,790 INFO L225 Difference]: With dead ends: 75 [2022-01-31 20:38:29,791 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 20:38:29,791 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 20:38:29,792 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:29,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 32 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 20:38:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2022-01-31 20:38:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:29,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-01-31 20:38:29,809 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2022-01-31 20:38:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:29,809 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-01-31 20:38:29,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:29,810 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-01-31 20:38:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 20:38:29,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:29,810 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:29,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:38:29,811 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:29,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:29,811 INFO L85 PathProgramCache]: Analyzing trace with hash 133934009, now seen corresponding path program 3 times [2022-01-31 20:38:29,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:29,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920657747] [2022-01-31 20:38:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:29,818 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:29,818 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:29,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:29,821 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:29,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:29,915 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 20:38:29,915 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:29,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920657747] [2022-01-31 20:38:29,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [920657747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:29,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:29,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:38:29,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956053976] [2022-01-31 20:38:29,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:29,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:38:29,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:29,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:38:29,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:38:29,917 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:30,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:30,044 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2022-01-31 20:38:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:38:30,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 20:38:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:30,046 INFO L225 Difference]: With dead ends: 85 [2022-01-31 20:38:30,046 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 20:38:30,046 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 20:38:30,047 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:30,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 37 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:30,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 20:38:30,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2022-01-31 20:38:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-01-31 20:38:30,056 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2022-01-31 20:38:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:30,057 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-01-31 20:38:30,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-01-31 20:38:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 20:38:30,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:30,060 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:30,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:38:30,060 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:30,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:30,061 INFO L85 PathProgramCache]: Analyzing trace with hash 173558265, now seen corresponding path program 4 times [2022-01-31 20:38:30,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:30,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308246322] [2022-01-31 20:38:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:30,065 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:30,065 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:30,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:30,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:30,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:30,171 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 20:38:30,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:30,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308246322] [2022-01-31 20:38:30,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [308246322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:30,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:30,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:38:30,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569076800] [2022-01-31 20:38:30,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:30,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:38:30,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:38:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:38:30,173 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:30,405 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2022-01-31 20:38:30,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:38:30,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 20:38:30,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:30,413 INFO L225 Difference]: With dead ends: 93 [2022-01-31 20:38:30,413 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 20:38:30,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:38:30,414 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:30,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 42 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 20:38:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2022-01-31 20:38:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-01-31 20:38:30,422 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2022-01-31 20:38:30,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:30,422 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-01-31 20:38:30,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-01-31 20:38:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 20:38:30,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:30,425 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:30,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:38:30,425 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:30,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:30,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1461422279, now seen corresponding path program 5 times [2022-01-31 20:38:30,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:30,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812392327] [2022-01-31 20:38:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:30,431 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:30,431 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:30,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:30,433 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:30,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:30,597 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 20:38:30,597 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:30,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812392327] [2022-01-31 20:38:30,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [812392327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:30,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:30,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:38:30,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121195977] [2022-01-31 20:38:30,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:30,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:38:30,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:38:30,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:38:30,599 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:30,744 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-01-31 20:38:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:38:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 20:38:30,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:30,747 INFO L225 Difference]: With dead ends: 62 [2022-01-31 20:38:30,747 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 20:38:30,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:38:30,750 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:30,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 54 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:30,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 20:38:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-31 20:38:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-01-31 20:38:30,765 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2022-01-31 20:38:30,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:30,765 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-01-31 20:38:30,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-01-31 20:38:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 20:38:30,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:30,777 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:30,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:38:30,778 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:30,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:30,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1421983316, now seen corresponding path program 1 times [2022-01-31 20:38:30,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:30,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68534503] [2022-01-31 20:38:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:30,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:30,781 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:30,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:30,782 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:30,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:38:30,920 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:30,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68534503] [2022-01-31 20:38:30,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [68534503] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:30,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:30,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:38:30,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827754114] [2022-01-31 20:38:30,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:30,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:38:30,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:30,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:38:30,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:38:30,922 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:31,090 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-01-31 20:38:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:38:31,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 20:38:31,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:31,093 INFO L225 Difference]: With dead ends: 55 [2022-01-31 20:38:31,093 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 20:38:31,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:38:31,094 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:31,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 56 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 20:38:31,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-01-31 20:38:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-01-31 20:38:31,113 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2022-01-31 20:38:31,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:31,113 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-01-31 20:38:31,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-01-31 20:38:31,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 20:38:31,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:31,116 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:31,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:38:31,116 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:31,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1370221367, now seen corresponding path program 1 times [2022-01-31 20:38:31,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:31,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208257904] [2022-01-31 20:38:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:31,121 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:31,123 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:31,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:31,125 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:31,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:31,201 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 20:38:31,201 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:31,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208257904] [2022-01-31 20:38:31,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1208257904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:31,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:31,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:38:31,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317669675] [2022-01-31 20:38:31,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:31,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:38:31,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:38:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:38:31,204 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 20:38:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:31,265 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-01-31 20:38:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 20:38:31,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 48 [2022-01-31 20:38:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:31,266 INFO L225 Difference]: With dead ends: 67 [2022-01-31 20:38:31,266 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 20:38:31,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:38:31,267 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:31,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:38:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 20:38:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-31 20:38:31,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-01-31 20:38:31,274 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 48 [2022-01-31 20:38:31,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:31,274 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-01-31 20:38:31,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 20:38:31,275 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-01-31 20:38:31,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 20:38:31,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:31,275 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:31,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:38:31,276 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:31,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1255822596, now seen corresponding path program 1 times [2022-01-31 20:38:31,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:31,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965332334] [2022-01-31 20:38:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:31,278 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:31,278 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:31,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:31,279 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:31,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:31,373 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 20:38:31,374 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:31,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965332334] [2022-01-31 20:38:31,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [965332334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:31,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:31,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:38:31,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213948182] [2022-01-31 20:38:31,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:31,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:38:31,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:31,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:38:31,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:38:31,376 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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 20:38:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:31,552 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2022-01-31 20:38:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:38:31,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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 50 [2022-01-31 20:38:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:31,553 INFO L225 Difference]: With dead ends: 75 [2022-01-31 20:38:31,553 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 20:38:31,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:38:31,554 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:31,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 56 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:31,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 20:38:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2022-01-31 20:38:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2022-01-31 20:38:31,584 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 50 [2022-01-31 20:38:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:31,584 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2022-01-31 20:38:31,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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 20:38:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2022-01-31 20:38:31,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 20:38:31,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:31,585 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:31,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:38:31,585 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:31,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:31,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1364208609, now seen corresponding path program 1 times [2022-01-31 20:38:31,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:31,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072726429] [2022-01-31 20:38:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:31,588 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:31,588 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:31,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:31,589 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:31,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:38:31,678 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:31,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072726429] [2022-01-31 20:38:31,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2072726429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:31,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:31,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:38:31,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027188670] [2022-01-31 20:38:31,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:31,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:38:31,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:31,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:38:31,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:38:31,680 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:31,888 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-01-31 20:38:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:38:31,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 20:38:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:31,890 INFO L225 Difference]: With dead ends: 85 [2022-01-31 20:38:31,890 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 20:38:31,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:38:31,891 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:31,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 56 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 20:38:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-01-31 20:38:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2022-01-31 20:38:31,900 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 52 [2022-01-31 20:38:31,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:31,900 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2022-01-31 20:38:31,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2022-01-31 20:38:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 20:38:31,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:31,901 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 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 20:38:31,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 20:38:31,902 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash 487788375, now seen corresponding path program 2 times [2022-01-31 20:38:31,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:31,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752145219] [2022-01-31 20:38:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:31,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:31,904 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:31,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:31,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:32,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:32,009 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 20:38:32,010 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:32,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752145219] [2022-01-31 20:38:32,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1752145219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:32,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:32,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:38:32,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362375944] [2022-01-31 20:38:32,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:32,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:38:32,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:32,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:38:32,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:38:32,012 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 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 20:38:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:32,239 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2022-01-31 20:38:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:38:32,240 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 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 52 [2022-01-31 20:38:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:32,240 INFO L225 Difference]: With dead ends: 83 [2022-01-31 20:38:32,241 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 20:38:32,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:38:32,242 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:32,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 66 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:32,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 20:38:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-01-31 20:38:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2022-01-31 20:38:32,249 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 52 [2022-01-31 20:38:32,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:32,250 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2022-01-31 20:38:32,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 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 20:38:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2022-01-31 20:38:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 20:38:32,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:32,251 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:32,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 20:38:32,251 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:32,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:32,251 INFO L85 PathProgramCache]: Analyzing trace with hash -559251162, now seen corresponding path program 2 times [2022-01-31 20:38:32,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:32,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304429096] [2022-01-31 20:38:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:32,253 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:32,253 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:32,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:32,254 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:32,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:32,309 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 20:38:32,309 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304429096] [2022-01-31 20:38:32,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [304429096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:32,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:32,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:38:32,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199656453] [2022-01-31 20:38:32,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:32,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:38:32,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:32,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:38:32,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:38:32,311 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 20:38:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:32,415 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2022-01-31 20:38:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:38:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 54 [2022-01-31 20:38:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:32,416 INFO L225 Difference]: With dead ends: 69 [2022-01-31 20:38:32,416 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 20:38:32,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:38:32,417 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:32,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 20:38:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-31 20:38:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:32,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-01-31 20:38:32,425 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 54 [2022-01-31 20:38:32,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:32,425 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-01-31 20:38:32,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 20:38:32,425 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-01-31 20:38:32,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 20:38:32,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:32,426 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:32,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 20:38:32,426 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:32,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:32,426 INFO L85 PathProgramCache]: Analyzing trace with hash 328203649, now seen corresponding path program 3 times [2022-01-31 20:38:32,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:32,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555267761] [2022-01-31 20:38:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:32,428 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:32,428 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:32,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:32,429 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:32,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:32,519 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 20:38:32,520 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:32,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555267761] [2022-01-31 20:38:32,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1555267761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:32,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:32,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:38:32,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927622138] [2022-01-31 20:38:32,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:32,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:38:32,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:32,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:38:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:38:32,521 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 11 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 20:38:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:32,724 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-01-31 20:38:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:38:32,724 INFO L78 Accepts]: Start accepts. Automaton has has 11 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 56 [2022-01-31 20:38:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:32,724 INFO L225 Difference]: With dead ends: 66 [2022-01-31 20:38:32,725 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 20:38:32,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:38:32,725 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:32,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 61 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 20:38:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-01-31 20:38:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-01-31 20:38:32,732 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 56 [2022-01-31 20:38:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:32,732 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-01-31 20:38:32,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 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 20:38:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-01-31 20:38:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 20:38:32,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:32,733 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:32,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 20:38:32,733 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:32,733 INFO L85 PathProgramCache]: Analyzing trace with hash -351854721, now seen corresponding path program 3 times [2022-01-31 20:38:32,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:32,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988900487] [2022-01-31 20:38:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:32,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:32,735 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:32,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:32,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:32,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:32,825 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 20:38:32,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:32,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988900487] [2022-01-31 20:38:32,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [988900487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:32,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:32,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:38:32,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123395647] [2022-01-31 20:38:32,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:32,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:38:32,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:32,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:38:32,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:38:32,826 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 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 20:38:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:33,013 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2022-01-31 20:38:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:38:33,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 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 56 [2022-01-31 20:38:33,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:33,014 INFO L225 Difference]: With dead ends: 87 [2022-01-31 20:38:33,014 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 20:38:33,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:38:33,015 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:33,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 61 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:33,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 20:38:33,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2022-01-31 20:38:33,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-01-31 20:38:33,024 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 56 [2022-01-31 20:38:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:33,024 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-01-31 20:38:33,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 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 20:38:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-01-31 20:38:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:38:33,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:33,025 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:33,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 20:38:33,025 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:33,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:33,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1780018396, now seen corresponding path program 4 times [2022-01-31 20:38:33,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:33,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559626423] [2022-01-31 20:38:33,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:33,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:33,027 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:33,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:33,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:33,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:38:33,090 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:33,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559626423] [2022-01-31 20:38:33,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [559626423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:33,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:33,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:38:33,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252960339] [2022-01-31 20:38:33,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:33,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:38:33,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:33,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:38:33,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:38:33,091 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 20:38:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:33,232 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2022-01-31 20:38:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:38:33,232 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 58 [2022-01-31 20:38:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:33,233 INFO L225 Difference]: With dead ends: 109 [2022-01-31 20:38:33,233 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 20:38:33,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:38:33,234 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:33,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 52 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 20:38:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2022-01-31 20:38:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 81 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2022-01-31 20:38:33,249 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 58 [2022-01-31 20:38:33,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:33,249 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2022-01-31 20:38:33,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 20:38:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2022-01-31 20:38:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:38:33,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:33,250 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:33,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 20:38:33,250 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:33,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:33,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2088694042, now seen corresponding path program 4 times [2022-01-31 20:38:33,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:33,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277882568] [2022-01-31 20:38:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:33,252 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:33,252 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:33,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:33,253 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:33,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:33,354 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 20:38:33,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:33,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277882568] [2022-01-31 20:38:33,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [277882568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:33,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:33,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:38:33,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084199555] [2022-01-31 20:38:33,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:33,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:38:33,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:33,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:38:33,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:38:33,356 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 20:38:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:33,627 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2022-01-31 20:38:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:38:33,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 58 [2022-01-31 20:38:33,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:33,628 INFO L225 Difference]: With dead ends: 110 [2022-01-31 20:38:33,628 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 20:38:33,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:38:33,629 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:33,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 62 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:33,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 20:38:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2022-01-31 20:38:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2022-01-31 20:38:33,648 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 58 [2022-01-31 20:38:33,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:33,649 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2022-01-31 20:38:33,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 20:38:33,649 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2022-01-31 20:38:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 20:38:33,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:33,650 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:33,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 20:38:33,650 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:33,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:33,650 INFO L85 PathProgramCache]: Analyzing trace with hash 144224649, now seen corresponding path program 5 times [2022-01-31 20:38:33,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:33,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928223280] [2022-01-31 20:38:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:33,652 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:33,652 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:33,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:33,654 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:33,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:33,732 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 20:38:33,732 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:33,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928223280] [2022-01-31 20:38:33,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [928223280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:33,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:33,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:38:33,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542287404] [2022-01-31 20:38:33,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:33,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:38:33,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:38:33,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:38:33,733 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:33,883 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2022-01-31 20:38:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:38:33,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 20:38:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:33,885 INFO L225 Difference]: With dead ends: 106 [2022-01-31 20:38:33,885 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 20:38:33,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:38:33,885 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:33,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 52 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:33,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 20:38:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-01-31 20:38:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.1625) internal successors, (93), 80 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2022-01-31 20:38:33,900 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 60 [2022-01-31 20:38:33,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:33,900 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2022-01-31 20:38:33,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:33,900 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2022-01-31 20:38:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 20:38:33,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:33,901 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 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 20:38:33,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 20:38:33,901 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:33,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2129101949, now seen corresponding path program 5 times [2022-01-31 20:38:33,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:33,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287850654] [2022-01-31 20:38:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:33,903 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:33,903 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:33,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:33,905 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:33,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:33,972 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 20:38:33,972 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:33,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287850654] [2022-01-31 20:38:33,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [287850654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:33,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:33,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:38:33,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766876476] [2022-01-31 20:38:33,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:33,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:38:33,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:33,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:38:33,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:38:33,974 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 20:38:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:34,124 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2022-01-31 20:38:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:38:34,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 60 [2022-01-31 20:38:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:34,125 INFO L225 Difference]: With dead ends: 91 [2022-01-31 20:38:34,125 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 20:38:34,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:38:34,126 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:34,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 55 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 20:38:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-31 20:38:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 63 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2022-01-31 20:38:34,136 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 60 [2022-01-31 20:38:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:34,136 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2022-01-31 20:38:34,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 20:38:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2022-01-31 20:38:34,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 20:38:34,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:34,137 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:34,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 20:38:34,137 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:34,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:34,138 INFO L85 PathProgramCache]: Analyzing trace with hash -344219479, now seen corresponding path program 6 times [2022-01-31 20:38:34,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:34,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849074732] [2022-01-31 20:38:34,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:34,140 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:34,140 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:34,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:34,142 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:34,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:34,213 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 20:38:34,213 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849074732] [2022-01-31 20:38:34,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1849074732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:34,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:34,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:38:34,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141736183] [2022-01-31 20:38:34,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:34,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:38:34,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:34,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:38:34,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:38:34,214 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:34,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:34,357 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2022-01-31 20:38:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:38:34,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 20:38:34,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:34,358 INFO L225 Difference]: With dead ends: 79 [2022-01-31 20:38:34,359 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 20:38:34,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:38:34,359 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:34,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 53 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:34,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 20:38:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-01-31 20:38:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-01-31 20:38:34,369 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2022-01-31 20:38:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:34,369 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-01-31 20:38:34,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-01-31 20:38:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 20:38:34,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:34,371 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:34,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 20:38:34,371 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash -346543548, now seen corresponding path program 7 times [2022-01-31 20:38:34,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:34,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181725120] [2022-01-31 20:38:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:34,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:34,374 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:34,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:34,375 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:34,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:38:34,482 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:34,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181725120] [2022-01-31 20:38:34,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [181725120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:34,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:34,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:38:34,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706344099] [2022-01-31 20:38:34,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:34,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:38:34,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:38:34,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:38:34,483 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 13 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 20:38:34,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:34,719 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-01-31 20:38:34,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:38:34,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 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 62 [2022-01-31 20:38:34,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:34,720 INFO L225 Difference]: With dead ends: 74 [2022-01-31 20:38:34,720 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 20:38:34,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:38:34,721 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:34,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 61 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:34,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 20:38:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-01-31 20:38:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-01-31 20:38:34,729 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 62 [2022-01-31 20:38:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:34,729 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-01-31 20:38:34,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 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 20:38:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-01-31 20:38:34,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 20:38:34,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:34,730 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:34,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 20:38:34,730 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:34,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1047608126, now seen corresponding path program 6 times [2022-01-31 20:38:34,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:34,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563528402] [2022-01-31 20:38:34,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:34,732 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:34,732 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:34,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:34,734 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:34,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:34,843 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 20:38:34,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:34,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563528402] [2022-01-31 20:38:34,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563528402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:34,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:34,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:38:34,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918031420] [2022-01-31 20:38:34,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:34,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:38:34,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:34,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:38:34,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:38:34,845 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 20:38:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:35,096 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2022-01-31 20:38:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:38:35,096 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 20:38:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:35,097 INFO L225 Difference]: With dead ends: 99 [2022-01-31 20:38:35,097 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 20:38:35,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:38:35,098 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:35,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 61 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 20:38:35,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2022-01-31 20:38:35,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-01-31 20:38:35,110 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 62 [2022-01-31 20:38:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:35,111 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-01-31 20:38:35,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 20:38:35,111 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-01-31 20:38:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 20:38:35,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:35,112 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:35,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 20:38:35,112 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1672013017, now seen corresponding path program 8 times [2022-01-31 20:38:35,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:35,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918745700] [2022-01-31 20:38:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:35,114 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:35,114 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:35,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:35,116 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:35,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:38:35,187 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:35,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918745700] [2022-01-31 20:38:35,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [918745700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:35,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:35,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:38:35,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448750164] [2022-01-31 20:38:35,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:35,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:38:35,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:35,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:38:35,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:38:35,189 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 20:38:35,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:35,382 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2022-01-31 20:38:35,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:38:35,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 64 [2022-01-31 20:38:35,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:35,383 INFO L225 Difference]: With dead ends: 129 [2022-01-31 20:38:35,383 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 20:38:35,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:38:35,385 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:35,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 47 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 20:38:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2022-01-31 20:38:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 95 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2022-01-31 20:38:35,406 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 64 [2022-01-31 20:38:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:35,406 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2022-01-31 20:38:35,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 20:38:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2022-01-31 20:38:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 20:38:35,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:35,407 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:35,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 20:38:35,407 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1013928861, now seen corresponding path program 7 times [2022-01-31 20:38:35,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:35,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702881081] [2022-01-31 20:38:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:35,410 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:35,410 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:35,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:35,412 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:35,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:35,553 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 20:38:35,553 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:35,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702881081] [2022-01-31 20:38:35,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [702881081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:35,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:35,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:38:35,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644762668] [2022-01-31 20:38:35,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:35,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:38:35,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:35,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:38:35,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:38:35,556 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 20:38:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:35,928 INFO L93 Difference]: Finished difference Result 132 states and 162 transitions. [2022-01-31 20:38:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:38:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 64 [2022-01-31 20:38:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:35,930 INFO L225 Difference]: With dead ends: 132 [2022-01-31 20:38:35,930 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 20:38:35,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:38:35,931 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:35,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 57 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 20:38:35,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 104. [2022-01-31 20:38:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 99 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:35,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2022-01-31 20:38:35,955 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 64 [2022-01-31 20:38:35,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:35,956 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2022-01-31 20:38:35,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 20:38:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2022-01-31 20:38:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:38:35,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:35,956 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 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 20:38:35,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 20:38:35,957 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:35,957 INFO L85 PathProgramCache]: Analyzing trace with hash -429691828, now seen corresponding path program 9 times [2022-01-31 20:38:35,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:35,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581994640] [2022-01-31 20:38:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:35,958 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:35,958 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:35,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:35,960 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:36,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:36,065 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 20:38:36,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:36,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581994640] [2022-01-31 20:38:36,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [581994640] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:36,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:36,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:38:36,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838484161] [2022-01-31 20:38:36,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:36,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:38:36,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:38:36,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:38:36,067 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 20:38:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:36,323 INFO L93 Difference]: Finished difference Result 136 states and 166 transitions. [2022-01-31 20:38:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:38:36,323 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 66 [2022-01-31 20:38:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:36,324 INFO L225 Difference]: With dead ends: 136 [2022-01-31 20:38:36,324 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 20:38:36,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:38:36,325 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:36,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 57 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 20:38:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2022-01-31 20:38:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 101 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2022-01-31 20:38:36,351 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 66 [2022-01-31 20:38:36,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:36,352 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2022-01-31 20:38:36,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 20:38:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2022-01-31 20:38:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:38:36,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:36,353 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 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 20:38:36,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 20:38:36,353 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:36,353 INFO L85 PathProgramCache]: Analyzing trace with hash 71914048, now seen corresponding path program 8 times [2022-01-31 20:38:36,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:36,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714413449] [2022-01-31 20:38:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:36,355 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:36,355 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:36,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:36,356 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:36,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:36,438 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 20:38:36,438 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:36,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714413449] [2022-01-31 20:38:36,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1714413449] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:36,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:36,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:38:36,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969456510] [2022-01-31 20:38:36,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:36,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:38:36,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:36,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:38:36,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:38:36,440 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 20:38:36,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:36,639 INFO L93 Difference]: Finished difference Result 134 states and 162 transitions. [2022-01-31 20:38:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:38:36,639 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 66 [2022-01-31 20:38:36,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:36,640 INFO L225 Difference]: With dead ends: 134 [2022-01-31 20:38:36,640 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 20:38:36,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:38:36,641 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:36,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:36,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 20:38:36,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2022-01-31 20:38:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2022-01-31 20:38:36,660 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 66 [2022-01-31 20:38:36,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:36,661 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2022-01-31 20:38:36,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 20:38:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2022-01-31 20:38:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 20:38:36,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:36,661 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:36,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 20:38:36,662 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:36,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:36,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1121275668, now seen corresponding path program 10 times [2022-01-31 20:38:36,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:36,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971896134] [2022-01-31 20:38:36,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:36,663 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:36,664 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:36,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:36,665 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:36,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:38:36,752 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971896134] [2022-01-31 20:38:36,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [971896134] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:36,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:36,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:38:36,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659960241] [2022-01-31 20:38:36,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:36,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:38:36,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:38:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:38:36,753 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 20:38:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:37,000 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2022-01-31 20:38:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:38:37,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 66 [2022-01-31 20:38:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:37,001 INFO L225 Difference]: With dead ends: 118 [2022-01-31 20:38:37,001 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 20:38:37,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:38:37,002 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 87 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:37,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 55 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 20:38:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-01-31 20:38:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 84 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2022-01-31 20:38:37,022 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 66 [2022-01-31 20:38:37,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:37,022 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2022-01-31 20:38:37,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 20:38:37,022 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2022-01-31 20:38:37,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 20:38:37,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:37,023 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 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 20:38:37,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 20:38:37,023 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:37,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:37,023 INFO L85 PathProgramCache]: Analyzing trace with hash 719926191, now seen corresponding path program 11 times [2022-01-31 20:38:37,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:37,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369427546] [2022-01-31 20:38:37,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:37,025 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:37,025 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:37,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:37,027 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:37,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:38:37,132 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:37,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369427546] [2022-01-31 20:38:37,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1369427546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:37,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:37,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:38:37,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957389970] [2022-01-31 20:38:37,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:37,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:38:37,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:37,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:38:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:38:37,136 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:37,378 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2022-01-31 20:38:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:38:37,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 20:38:37,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:37,379 INFO L225 Difference]: With dead ends: 106 [2022-01-31 20:38:37,379 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 20:38:37,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:38:37,380 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:37,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 59 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 20:38:37,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-01-31 20:38:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2022-01-31 20:38:37,392 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 68 [2022-01-31 20:38:37,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:37,392 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2022-01-31 20:38:37,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:37,396 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2022-01-31 20:38:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 20:38:37,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:37,397 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 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 20:38:37,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 20:38:37,397 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:37,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:37,398 INFO L85 PathProgramCache]: Analyzing trace with hash 462723015, now seen corresponding path program 12 times [2022-01-31 20:38:37,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:37,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012557773] [2022-01-31 20:38:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:37,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:37,401 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:37,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:37,403 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:37,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:37,555 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 20:38:37,556 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:37,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012557773] [2022-01-31 20:38:37,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012557773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:37,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:37,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:38:37,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545321747] [2022-01-31 20:38:37,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:37,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:38:37,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:37,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:38:37,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:38:37,558 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 15 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 20:38:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:37,823 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2022-01-31 20:38:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:38:37,823 INFO L78 Accepts]: Start accepts. Automaton has has 15 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 68 [2022-01-31 20:38:37,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:37,824 INFO L225 Difference]: With dead ends: 82 [2022-01-31 20:38:37,824 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 20:38:37,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:38:37,825 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:37,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 61 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:37,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 20:38:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2022-01-31 20:38:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:37,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2022-01-31 20:38:37,837 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 68 [2022-01-31 20:38:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:37,838 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2022-01-31 20:38:37,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 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 20:38:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2022-01-31 20:38:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 20:38:37,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:37,839 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:37,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 20:38:37,839 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:37,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1049529029, now seen corresponding path program 9 times [2022-01-31 20:38:37,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:37,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768735281] [2022-01-31 20:38:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:37,841 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:37,841 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:37,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:37,842 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:37,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:38:37,981 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:37,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768735281] [2022-01-31 20:38:37,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [768735281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:37,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:37,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:38:37,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749133237] [2022-01-31 20:38:37,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:37,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:38:37,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:37,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:38:37,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:38:37,982 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 20:38:38,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:38,260 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2022-01-31 20:38:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:38:38,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 68 [2022-01-31 20:38:38,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:38,261 INFO L225 Difference]: With dead ends: 111 [2022-01-31 20:38:38,262 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 20:38:38,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:38:38,267 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:38,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 56 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 20:38:38,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2022-01-31 20:38:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 75 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2022-01-31 20:38:38,285 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 68 [2022-01-31 20:38:38,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:38,286 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2022-01-31 20:38:38,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 20:38:38,286 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2022-01-31 20:38:38,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 20:38:38,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:38,287 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:38,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 20:38:38,287 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1355926550, now seen corresponding path program 13 times [2022-01-31 20:38:38,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:38,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439979800] [2022-01-31 20:38:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:38,289 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:38,289 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:38,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:38,290 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:38,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:38,383 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 20:38:38,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:38,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439979800] [2022-01-31 20:38:38,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [439979800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:38,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:38,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:38:38,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706641113] [2022-01-31 20:38:38,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:38,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:38:38,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:38,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:38:38,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:38:38,384 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:38,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:38,631 INFO L93 Difference]: Finished difference Result 149 states and 184 transitions. [2022-01-31 20:38:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:38:38,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 20:38:38,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:38,632 INFO L225 Difference]: With dead ends: 149 [2022-01-31 20:38:38,632 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 20:38:38,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:38:38,633 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:38,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 52 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 20:38:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2022-01-31 20:38:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.2201834862385321) internal successors, (133), 109 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-01-31 20:38:38,675 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 70 [2022-01-31 20:38:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:38,675 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-01-31 20:38:38,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-01-31 20:38:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 20:38:38,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:38,676 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:38,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 20:38:38,676 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1441126688, now seen corresponding path program 10 times [2022-01-31 20:38:38,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:38,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914285836] [2022-01-31 20:38:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:38,679 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:38,679 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:38,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:38,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:39,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:39,068 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 20:38:39,068 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:39,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914285836] [2022-01-31 20:38:39,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [914285836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:39,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:39,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:38:39,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814533704] [2022-01-31 20:38:39,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:39,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:38:39,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:38:39,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:38:39,070 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 20:38:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:39,646 INFO L93 Difference]: Finished difference Result 143 states and 174 transitions. [2022-01-31 20:38:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:38:39,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 70 [2022-01-31 20:38:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:39,647 INFO L225 Difference]: With dead ends: 143 [2022-01-31 20:38:39,647 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 20:38:39,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:38:39,648 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:39,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:38:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 20:38:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2022-01-31 20:38:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 94 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2022-01-31 20:38:39,697 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 70 [2022-01-31 20:38:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:39,697 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2022-01-31 20:38:39,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 20:38:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2022-01-31 20:38:39,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:38:39,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:39,700 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 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 20:38:39,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 20:38:39,701 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1988634575, now seen corresponding path program 14 times [2022-01-31 20:38:39,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:39,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341249635] [2022-01-31 20:38:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:39,703 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:39,703 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:39,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:39,705 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:39,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:39,813 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 20:38:39,813 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:39,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341249635] [2022-01-31 20:38:39,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [341249635] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:39,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:39,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:38:39,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589251182] [2022-01-31 20:38:39,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:39,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:38:39,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:39,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:38:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:38:39,815 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 20:38:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:40,122 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2022-01-31 20:38:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:38:40,123 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 72 [2022-01-31 20:38:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:40,124 INFO L225 Difference]: With dead ends: 140 [2022-01-31 20:38:40,124 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 20:38:40,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:38:40,125 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:40,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 51 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:40,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 20:38:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 103. [2022-01-31 20:38:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.163265306122449) internal successors, (114), 98 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-01-31 20:38:40,158 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 72 [2022-01-31 20:38:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:40,159 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-01-31 20:38:40,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 20:38:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-01-31 20:38:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:38:40,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:40,160 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:38:40,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 20:38:40,160 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1533649391, now seen corresponding path program 15 times [2022-01-31 20:38:40,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:40,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855553301] [2022-01-31 20:38:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:40,162 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:40,162 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:40,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:40,163 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:40,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:40,269 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 20:38:40,269 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:40,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855553301] [2022-01-31 20:38:40,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1855553301] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:40,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:40,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:38:40,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372576096] [2022-01-31 20:38:40,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:40,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:38:40,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:38:40,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:38:40,270 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 20:38:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:40,528 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2022-01-31 20:38:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:38:40,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 72 [2022-01-31 20:38:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:40,529 INFO L225 Difference]: With dead ends: 122 [2022-01-31 20:38:40,529 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 20:38:40,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:38:40,530 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:40,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 51 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 20:38:40,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-01-31 20:38:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:38:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2022-01-31 20:38:40,557 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 72 [2022-01-31 20:38:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:40,558 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2022-01-31 20:38:40,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 20:38:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2022-01-31 20:38:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 20:38:40,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:38:40,558 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 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 20:38:40,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 20:38:40,559 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:38:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:38:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash 769718898, now seen corresponding path program 16 times [2022-01-31 20:38:40,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:38:40,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111615423] [2022-01-31 20:38:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:38:40,561 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:38:40,561 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:38:40,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:38:40,562 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:38:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:40,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:38:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:38:40,686 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 20:38:40,686 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:38:40,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111615423] [2022-01-31 20:38:40,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2111615423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:38:40,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:38:40,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:38:40,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445585160] [2022-01-31 20:38:40,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:38:40,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:38:40,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:38:40,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:38:40,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:38:40,688 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 20:38:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:38:40,930 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2022-01-31 20:38:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:38:40,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 74 [2022-01-31 20:38:40,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:38:40,930 INFO L225 Difference]: With dead ends: 94 [2022-01-31 20:38:40,930 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 20:38:40,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:38:40,931 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:38:40,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 63 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:38:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 20:38:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 20:38:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 20:38:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 20:38:40,932 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2022-01-31 20:38:40,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:38:40,933 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 20:38:40,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 20:38:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 20:38:40,933 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 20:38:40,935 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 20:38:40,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 20:38:40,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.