/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:11:03,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:11:03,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:11:03,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 23:11:03,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 23:11:03,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 23:11:03,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 23:11:03,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 23:11:03,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 23:11:03,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 23:11:03,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 23:11:03,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 23:11:03,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:11:03,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:11:03,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:11:03,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:11:03,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:11:03,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:11:03,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:11:03,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:11:03,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:11:03,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:11:03,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:11:03,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:11:03,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 23:11:03,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 23:11:03,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 23:11:03,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 23:11:03,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 23:11:03,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 23:11:03,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 23:11:03,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 23:11:03,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 23:11:03,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 23:11:03,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 23:11:03,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 23:11:03,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 23:11:03,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 23:11:03,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:11:03,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:11:03,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:11:03,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:11:03,850 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:11:03,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:11:03,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:11:03,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:11:03,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:11:03,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:11:03,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:11:03,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:11:03,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:11:03,853 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:11:03,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:11:03,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:11:03,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:11:03,854 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:11:03,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:11:03,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:11:03,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:11:03,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:11:03,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:11:03,855 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:11:03,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:11:04,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:11:04,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:11:04,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:11:04,092 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:11:04,093 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:11:04,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_single_elem_init.i [2022-01-31 23:11:04,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eda675844/8926b1a0bee1475b85fcfff91cda37c5/FLAG6bbdba171 [2022-01-31 23:11:04,554 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:11:04,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_single_elem_init.i [2022-01-31 23:11:04,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eda675844/8926b1a0bee1475b85fcfff91cda37c5/FLAG6bbdba171 [2022-01-31 23:11:04,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eda675844/8926b1a0bee1475b85fcfff91cda37c5 [2022-01-31 23:11:04,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:11:04,574 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:11:04,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:11:04,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:11:04,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:11:04,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:11:04" (1/1) ... [2022-01-31 23:11:04,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60455c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:04, skipping insertion in model container [2022-01-31 23:11:04,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:11:04" (1/1) ... [2022-01-31 23:11:04,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:11:04,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:11:04,753 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_single_elem_init.i[865,878] [2022-01-31 23:11:04,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:11:06,006 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:11:06,018 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_single_elem_init.i[865,878] [2022-01-31 23:11:06,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:11:06,044 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:11:06,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:06 WrapperNode [2022-01-31 23:11:06,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:11:06,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:11:06,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:11:06,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:11:06,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:06" (1/1) ... [2022-01-31 23:11:06,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:06" (1/1) ... [2022-01-31 23:11:06,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:06" (1/1) ... [2022-01-31 23:11:06,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:06" (1/1) ... [2022-01-31 23:11:06,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:06" (1/1) ... [2022-01-31 23:11:06,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:06" (1/1) ... [2022-01-31 23:11:06,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:06" (1/1) ... [2022-01-31 23:11:06,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:11:06,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:11:06,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:11:06,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:11:06,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:06" (1/1) ... [2022-01-31 23:11:06,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:11:06,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:11:06,125 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 23:11:06,136 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 23:11:06,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:11:06,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:11:06,162 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:11:06,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 23:11:06,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:11:06,163 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:11:06,163 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:11:06,163 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 23:11:06,163 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 23:11:06,163 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:11:06,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:11:06,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:11:06,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 23:11:06,164 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:11:06,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 23:11:06,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:11:06,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:11:06,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:11:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:11:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:11:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:11:06,252 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:11:06,253 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:11:06,451 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:11:06,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:11:06,456 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 23:11:06,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:11:06 BoogieIcfgContainer [2022-01-31 23:11:06,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:11:06,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:11:06,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:11:06,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:11:06,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:11:04" (1/3) ... [2022-01-31 23:11:06,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3556e914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:11:06, skipping insertion in model container [2022-01-31 23:11:06,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:11:06" (2/3) ... [2022-01-31 23:11:06,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3556e914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:11:06, skipping insertion in model container [2022-01-31 23:11:06,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:11:06" (3/3) ... [2022-01-31 23:11:06,463 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_single_elem_init.i [2022-01-31 23:11:06,467 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:11:06,467 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:11:06,505 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:11:06,510 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-01-31 23:11:06,511 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:11:06,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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 23:11:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 23:11:06,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:06,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:06,542 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:06,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1771181604, now seen corresponding path program 1 times [2022-01-31 23:11:06,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:06,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823610437] [2022-01-31 23:11:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:06,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:06,611 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:06,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:06,733 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 23:11:06,735 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:06,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823610437] [2022-01-31 23:11:06,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823610437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:06,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:06,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 23:11:06,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585675530] [2022-01-31 23:11:06,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:06,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 23:11:06,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 23:11:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:11:06,769 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:06,855 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2022-01-31 23:11:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 23:11:06,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 23:11:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:06,866 INFO L225 Difference]: With dead ends: 48 [2022-01-31 23:11:06,866 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 23:11:06,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:11:06,873 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:06,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 33 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 23:11:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-01-31 23:11:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-31 23:11:06,916 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2022-01-31 23:11:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:06,917 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-31 23:11:06,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-31 23:11:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 23:11:06,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:06,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:06,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:11:06,919 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:06,920 INFO L85 PathProgramCache]: Analyzing trace with hash -501714153, now seen corresponding path program 1 times [2022-01-31 23:11:06,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:06,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072904996] [2022-01-31 23:11:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:06,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:06,930 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:06,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:06,998 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 23:11:06,998 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:06,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072904996] [2022-01-31 23:11:06,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2072904996] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:06,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:06,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:11:06,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969243168] [2022-01-31 23:11:06,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:07,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:11:07,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:07,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:11:07,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:11:07,001 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:07,083 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2022-01-31 23:11:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 23:11:07,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 23:11:07,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:07,102 INFO L225 Difference]: With dead ends: 46 [2022-01-31 23:11:07,102 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 23:11:07,102 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 23:11:07,104 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:07,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 36 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:11:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 23:11:07,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2022-01-31 23:11:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-31 23:11:07,151 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2022-01-31 23:11:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:07,151 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-31 23:11:07,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-31 23:11:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 23:11:07,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:07,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:07,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:11:07,153 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash 792367698, now seen corresponding path program 1 times [2022-01-31 23:11:07,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:07,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507216464] [2022-01-31 23:11:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:07,195 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:07,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:07,197 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:07,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:07,298 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 23:11:07,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:07,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507216464] [2022-01-31 23:11:07,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [507216464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:07,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:07,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 23:11:07,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013075032] [2022-01-31 23:11:07,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:07,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 23:11:07,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:07,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 23:11:07,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 23:11:07,301 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:07,396 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-01-31 23:11:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 23:11:07,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 23:11:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:07,398 INFO L225 Difference]: With dead ends: 56 [2022-01-31 23:11:07,398 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 23:11:07,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:11:07,400 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:07,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 44 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 23:11:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2022-01-31 23:11:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-01-31 23:11:07,407 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 19 [2022-01-31 23:11:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:07,408 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-01-31 23:11:07,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-01-31 23:11:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 23:11:07,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:07,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:07,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 23:11:07,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:07,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:07,410 INFO L85 PathProgramCache]: Analyzing trace with hash -747332595, now seen corresponding path program 2 times [2022-01-31 23:11:07,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:07,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401027072] [2022-01-31 23:11:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:07,419 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:07,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:07,420 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:07,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:07,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:07,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401027072] [2022-01-31 23:11:07,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [401027072] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:07,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:07,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:11:07,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940906271] [2022-01-31 23:11:07,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:07,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:11:07,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:11:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:11:07,514 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:07,609 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2022-01-31 23:11:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:11:07,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 23:11:07,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:07,611 INFO L225 Difference]: With dead ends: 66 [2022-01-31 23:11:07,611 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 23:11:07,612 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 23:11:07,613 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:07,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 58 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 23:11:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2022-01-31 23:11:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-01-31 23:11:07,620 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2022-01-31 23:11:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:07,621 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-01-31 23:11:07,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-01-31 23:11:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 23:11:07,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:07,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:07,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 23:11:07,622 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:07,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1405964360, now seen corresponding path program 3 times [2022-01-31 23:11:07,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:07,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082483698] [2022-01-31 23:11:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:07,631 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:07,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:07,632 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:07,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:07,724 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:07,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082483698] [2022-01-31 23:11:07,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2082483698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:07,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:07,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:11:07,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386682182] [2022-01-31 23:11:07,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:07,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:11:07,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:07,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:11:07,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:11:07,726 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:07,861 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2022-01-31 23:11:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:11:07,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 23:11:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:07,866 INFO L225 Difference]: With dead ends: 76 [2022-01-31 23:11:07,866 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 23:11:07,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-31 23:11:07,873 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:07,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 65 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 23:11:07,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2022-01-31 23:11:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-01-31 23:11:07,888 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 27 [2022-01-31 23:11:07,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:07,888 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-01-31 23:11:07,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-01-31 23:11:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 23:11:07,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:07,890 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:07,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 23:11:07,890 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:07,890 INFO L85 PathProgramCache]: Analyzing trace with hash -739545341, now seen corresponding path program 4 times [2022-01-31 23:11:07,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:07,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592221665] [2022-01-31 23:11:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:07,907 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:07,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:07,909 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:08,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:08,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592221665] [2022-01-31 23:11:08,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592221665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:08,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:08,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 23:11:08,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165774351] [2022-01-31 23:11:08,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:08,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 23:11:08,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:08,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 23:11:08,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 23:11:08,051 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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 23:11:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:08,176 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2022-01-31 23:11:08,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 23:11:08,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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 31 [2022-01-31 23:11:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:08,178 INFO L225 Difference]: With dead ends: 86 [2022-01-31 23:11:08,178 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 23:11:08,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:11:08,184 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 75 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:08,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 74 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:08,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 23:11:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2022-01-31 23:11:08,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-01-31 23:11:08,202 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 31 [2022-01-31 23:11:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:08,202 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-01-31 23:11:08,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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 23:11:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-01-31 23:11:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 23:11:08,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:08,203 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:08,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 23:11:08,204 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash -971655106, now seen corresponding path program 5 times [2022-01-31 23:11:08,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:08,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362370388] [2022-01-31 23:11:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:08,211 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:08,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:08,213 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:08,368 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:08,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362370388] [2022-01-31 23:11:08,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [362370388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:08,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:08,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:11:08,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039269899] [2022-01-31 23:11:08,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:08,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:11:08,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:08,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:11:08,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:11:08,370 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:08,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:08,503 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2022-01-31 23:11:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 23:11:08,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 23:11:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:08,505 INFO L225 Difference]: With dead ends: 96 [2022-01-31 23:11:08,506 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 23:11:08,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:11:08,507 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 131 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:08,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 82 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:08,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 23:11:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 44. [2022-01-31 23:11:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-01-31 23:11:08,519 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 35 [2022-01-31 23:11:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:08,519 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-01-31 23:11:08,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-01-31 23:11:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 23:11:08,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:08,521 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:08,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 23:11:08,521 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:08,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1691161607, now seen corresponding path program 6 times [2022-01-31 23:11:08,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:08,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894692264] [2022-01-31 23:11:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:08,534 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:08,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:08,537 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,673 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 23:11:08,673 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:08,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894692264] [2022-01-31 23:11:08,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894692264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:08,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:08,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 23:11:08,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027566550] [2022-01-31 23:11:08,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:08,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 23:11:08,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:08,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 23:11:08,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:11:08,675 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:08,799 INFO L93 Difference]: Finished difference Result 106 states and 141 transitions. [2022-01-31 23:11:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 23:11:08,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 23:11:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:08,800 INFO L225 Difference]: With dead ends: 106 [2022-01-31 23:11:08,800 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 23:11:08,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-01-31 23:11:08,801 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 108 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:08,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 96 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 23:11:08,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 48. [2022-01-31 23:11:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-01-31 23:11:08,807 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 39 [2022-01-31 23:11:08,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:08,808 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-01-31 23:11:08,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:08,808 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-01-31 23:11:08,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 23:11:08,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:08,809 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:08,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 23:11:08,809 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:08,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:08,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1925827124, now seen corresponding path program 7 times [2022-01-31 23:11:08,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:08,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630779375] [2022-01-31 23:11:08,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:08,815 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:08,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:08,817 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:08,928 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 23:11:08,929 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:08,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630779375] [2022-01-31 23:11:08,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [630779375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:08,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:08,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 23:11:08,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931649676] [2022-01-31 23:11:08,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:08,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 23:11:08,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 23:11:08,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 23:11:08,931 INFO L87 Difference]: Start difference. First operand 48 states and 58 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 23:11:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:09,082 INFO L93 Difference]: Finished difference Result 116 states and 155 transitions. [2022-01-31 23:11:09,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 23:11:09,083 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 43 [2022-01-31 23:11:09,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:09,084 INFO L225 Difference]: With dead ends: 116 [2022-01-31 23:11:09,084 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 23:11:09,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:11:09,085 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 136 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:09,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 105 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:09,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 23:11:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 52. [2022-01-31 23:11:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-01-31 23:11:09,090 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 43 [2022-01-31 23:11:09,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:09,091 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-01-31 23:11:09,091 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 23:11:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-01-31 23:11:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 23:11:09,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:09,092 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:09,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 23:11:09,093 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:09,093 INFO L85 PathProgramCache]: Analyzing trace with hash -889122065, now seen corresponding path program 8 times [2022-01-31 23:11:09,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:09,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132317482] [2022-01-31 23:11:09,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:09,097 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:09,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:09,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:09,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:09,221 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 23:11:09,221 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:09,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132317482] [2022-01-31 23:11:09,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1132317482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:09,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:09,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:11:09,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261343392] [2022-01-31 23:11:09,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:09,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:11:09,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:09,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:11:09,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:11:09,224 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 23:11:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:09,368 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2022-01-31 23:11:09,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 23:11:09,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 47 [2022-01-31 23:11:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:09,370 INFO L225 Difference]: With dead ends: 126 [2022-01-31 23:11:09,370 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 23:11:09,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:11:09,371 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 142 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:09,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 112 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 23:11:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 56. [2022-01-31 23:11:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-01-31 23:11:09,376 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 47 [2022-01-31 23:11:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:09,376 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-01-31 23:11:09,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 23:11:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-01-31 23:11:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 23:11:09,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:09,378 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:09,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 23:11:09,378 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:09,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:09,378 INFO L85 PathProgramCache]: Analyzing trace with hash 815760938, now seen corresponding path program 9 times [2022-01-31 23:11:09,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:09,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025401282] [2022-01-31 23:11:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:09,383 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:09,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:09,384 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:09,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:09,510 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 23:11:09,510 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:09,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025401282] [2022-01-31 23:11:09,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025401282] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:09,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:09,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 23:11:09,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635724890] [2022-01-31 23:11:09,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:09,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 23:11:09,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:09,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 23:11:09,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:11:09,512 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 23:11:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:09,659 INFO L93 Difference]: Finished difference Result 136 states and 183 transitions. [2022-01-31 23:11:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 23:11:09,660 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 51 [2022-01-31 23:11:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:09,662 INFO L225 Difference]: With dead ends: 136 [2022-01-31 23:11:09,662 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 23:11:09,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:11:09,663 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 194 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:09,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 116 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 23:11:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 60. [2022-01-31 23:11:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-01-31 23:11:09,676 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 51 [2022-01-31 23:11:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:09,676 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-01-31 23:11:09,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 23:11:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-01-31 23:11:09,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 23:11:09,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:09,677 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:09,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 23:11:09,677 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:09,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:09,678 INFO L85 PathProgramCache]: Analyzing trace with hash -284433435, now seen corresponding path program 10 times [2022-01-31 23:11:09,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:09,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947065804] [2022-01-31 23:11:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:09,682 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:09,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:09,684 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:09,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:09,818 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 23:11:09,818 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:09,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947065804] [2022-01-31 23:11:09,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [947065804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:09,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:09,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 23:11:09,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005421875] [2022-01-31 23:11:09,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:09,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 23:11:09,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:09,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 23:11:09,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:11:09,820 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:09,988 INFO L93 Difference]: Finished difference Result 146 states and 197 transitions. [2022-01-31 23:11:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 23:11:09,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 23:11:09,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:09,989 INFO L225 Difference]: With dead ends: 146 [2022-01-31 23:11:09,989 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 23:11:09,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:11:09,990 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 218 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:09,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 128 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:11:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 23:11:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 64. [2022-01-31 23:11:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-01-31 23:11:09,996 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 55 [2022-01-31 23:11:09,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:09,996 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-01-31 23:11:09,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:09,996 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-01-31 23:11:09,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 23:11:09,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:09,997 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:09,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 23:11:09,997 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:09,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1068700640, now seen corresponding path program 11 times [2022-01-31 23:11:09,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:09,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41298800] [2022-01-31 23:11:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:10,002 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:10,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:10,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:10,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:10,168 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 23:11:10,168 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:10,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41298800] [2022-01-31 23:11:10,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [41298800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:10,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:10,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:11:10,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331183967] [2022-01-31 23:11:10,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:10,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:11:10,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:11:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:11:10,170 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:10,366 INFO L93 Difference]: Finished difference Result 156 states and 211 transitions. [2022-01-31 23:11:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:11:10,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 23:11:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:10,368 INFO L225 Difference]: With dead ends: 156 [2022-01-31 23:11:10,368 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 23:11:10,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:11:10,369 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 237 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:10,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 132 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:10,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 23:11:10,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 68. [2022-01-31 23:11:10,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 62 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2022-01-31 23:11:10,376 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 59 [2022-01-31 23:11:10,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:10,376 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2022-01-31 23:11:10,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:10,376 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2022-01-31 23:11:10,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 23:11:10,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:10,377 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:10,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 23:11:10,377 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:10,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2097766107, now seen corresponding path program 12 times [2022-01-31 23:11:10,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:10,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090534403] [2022-01-31 23:11:10,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:10,383 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:10,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:10,385 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:10,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:10,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:10,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090534403] [2022-01-31 23:11:10,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2090534403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:10,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:10,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:11:10,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992648772] [2022-01-31 23:11:10,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:10,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:11:10,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:10,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:11:10,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:11:10,655 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:10,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:10,878 INFO L93 Difference]: Finished difference Result 166 states and 225 transitions. [2022-01-31 23:11:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 23:11:10,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 23:11:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:10,883 INFO L225 Difference]: With dead ends: 166 [2022-01-31 23:11:10,883 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 23:11:10,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2022-01-31 23:11:10,884 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 224 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:10,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 149 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 23:11:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 72. [2022-01-31 23:11:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-01-31 23:11:10,908 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 63 [2022-01-31 23:11:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:10,909 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-01-31 23:11:10,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-01-31 23:11:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 23:11:10,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:10,910 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:10,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 23:11:10,910 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:10,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:10,910 INFO L85 PathProgramCache]: Analyzing trace with hash -863503338, now seen corresponding path program 13 times [2022-01-31 23:11:10,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:10,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258766584] [2022-01-31 23:11:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:10,921 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:10,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:10,923 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:11,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:11,110 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 23:11:11,110 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:11,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258766584] [2022-01-31 23:11:11,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1258766584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:11,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:11,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 23:11:11,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936479010] [2022-01-31 23:11:11,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:11,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 23:11:11,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:11,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 23:11:11,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 23:11:11,112 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:11,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:11,327 INFO L93 Difference]: Finished difference Result 176 states and 239 transitions. [2022-01-31 23:11:11,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 23:11:11,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 23:11:11,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:11,330 INFO L225 Difference]: With dead ends: 176 [2022-01-31 23:11:11,330 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 23:11:11,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:11:11,334 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 204 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:11,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 175 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 23:11:11,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 76. [2022-01-31 23:11:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 70 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-01-31 23:11:11,342 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 67 [2022-01-31 23:11:11,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:11,343 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-01-31 23:11:11,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-01-31 23:11:11,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 23:11:11,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:11,343 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:11,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 23:11:11,344 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:11,345 INFO L85 PathProgramCache]: Analyzing trace with hash -726694959, now seen corresponding path program 14 times [2022-01-31 23:11:11,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:11,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294053198] [2022-01-31 23:11:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:11,350 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:11,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:11,353 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:11,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:11,581 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 23:11:11,581 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:11,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294053198] [2022-01-31 23:11:11,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [294053198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:11,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:11,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:11:11,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487968094] [2022-01-31 23:11:11,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:11,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:11:11,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:11,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:11:11,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:11:11,583 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:11,811 INFO L93 Difference]: Finished difference Result 186 states and 253 transitions. [2022-01-31 23:11:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 23:11:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 23:11:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:11,815 INFO L225 Difference]: With dead ends: 186 [2022-01-31 23:11:11,815 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 23:11:11,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:11:11,816 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 256 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:11,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 182 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 23:11:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 80. [2022-01-31 23:11:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 74 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:11,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2022-01-31 23:11:11,831 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 71 [2022-01-31 23:11:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:11,831 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2022-01-31 23:11:11,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2022-01-31 23:11:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 23:11:11,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:11,832 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:11,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 23:11:11,832 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:11,833 INFO L85 PathProgramCache]: Analyzing trace with hash -368658932, now seen corresponding path program 15 times [2022-01-31 23:11:11,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:11,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379634656] [2022-01-31 23:11:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:11,844 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:11,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:11,846 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:12,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:12,096 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 23:11:12,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:12,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379634656] [2022-01-31 23:11:12,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1379634656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:12,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:12,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:11:12,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161309022] [2022-01-31 23:11:12,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:12,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:11:12,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:12,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:11:12,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:11:12,098 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:12,325 INFO L93 Difference]: Finished difference Result 196 states and 267 transitions. [2022-01-31 23:11:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:11:12,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 23:11:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:12,327 INFO L225 Difference]: With dead ends: 196 [2022-01-31 23:11:12,327 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 23:11:12,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:11:12,328 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 267 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:12,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 186 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:12,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 23:11:12,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 84. [2022-01-31 23:11:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2022-01-31 23:11:12,333 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 75 [2022-01-31 23:11:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:12,333 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2022-01-31 23:11:12,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2022-01-31 23:11:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 23:11:12,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:12,334 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:12,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 23:11:12,335 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:12,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:12,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1068782279, now seen corresponding path program 16 times [2022-01-31 23:11:12,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:12,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116875427] [2022-01-31 23:11:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:12,339 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:12,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:12,342 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:12,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:12,577 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 23:11:12,577 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:12,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116875427] [2022-01-31 23:11:12,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [116875427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:12,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:12,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:11:12,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543502169] [2022-01-31 23:11:12,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:12,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:11:12,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:12,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:11:12,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:11:12,579 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:12,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:12,846 INFO L93 Difference]: Finished difference Result 206 states and 281 transitions. [2022-01-31 23:11:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 23:11:12,846 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 23:11:12,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:12,848 INFO L225 Difference]: With dead ends: 206 [2022-01-31 23:11:12,848 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 23:11:12,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:11:12,849 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 373 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:12,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 187 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:12,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 23:11:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 88. [2022-01-31 23:11:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 82 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-01-31 23:11:12,855 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 79 [2022-01-31 23:11:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:12,856 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-01-31 23:11:12,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:12,856 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-01-31 23:11:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 23:11:12,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:12,856 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:12,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 23:11:12,857 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1753277950, now seen corresponding path program 17 times [2022-01-31 23:11:12,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:12,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934162833] [2022-01-31 23:11:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:12,861 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:12,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:12,864 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:13,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:13,122 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 23:11:13,122 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934162833] [2022-01-31 23:11:13,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1934162833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:13,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:13,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:11:13,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947335655] [2022-01-31 23:11:13,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:13,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:11:13,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:13,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:11:13,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:11:13,124 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:13,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:13,368 INFO L93 Difference]: Finished difference Result 216 states and 295 transitions. [2022-01-31 23:11:13,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 23:11:13,369 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 23:11:13,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:13,371 INFO L225 Difference]: With dead ends: 216 [2022-01-31 23:11:13,371 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 23:11:13,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:11:13,374 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 464 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:13,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 191 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 23:11:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 92. [2022-01-31 23:11:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.255813953488372) internal successors, (108), 86 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2022-01-31 23:11:13,381 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 83 [2022-01-31 23:11:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:13,382 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2022-01-31 23:11:13,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2022-01-31 23:11:13,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 23:11:13,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:13,383 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:13,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 23:11:13,383 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:13,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash -238171203, now seen corresponding path program 18 times [2022-01-31 23:11:13,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:13,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801497891] [2022-01-31 23:11:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:13,388 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:13,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:13,391 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:13,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:13,684 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 23:11:13,684 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:13,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801497891] [2022-01-31 23:11:13,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [801497891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:13,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:13,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 23:11:13,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11485411] [2022-01-31 23:11:13,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:13,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 23:11:13,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:13,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 23:11:13,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:11:13,686 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:13,981 INFO L93 Difference]: Finished difference Result 226 states and 309 transitions. [2022-01-31 23:11:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 23:11:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 23:11:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:13,983 INFO L225 Difference]: With dead ends: 226 [2022-01-31 23:11:13,983 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 23:11:13,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2022-01-31 23:11:13,985 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 354 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:13,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 202 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 23:11:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 96. [2022-01-31 23:11:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 90 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-01-31 23:11:13,997 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 87 [2022-01-31 23:11:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:13,997 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-01-31 23:11:13,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-01-31 23:11:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 23:11:13,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:13,999 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:13,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 23:11:14,000 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:14,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:14,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1034364920, now seen corresponding path program 19 times [2022-01-31 23:11:14,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:14,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609108990] [2022-01-31 23:11:14,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:14,005 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:14,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:14,008 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:14,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:14,336 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 23:11:14,336 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:14,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609108990] [2022-01-31 23:11:14,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1609108990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:14,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:14,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 23:11:14,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904226853] [2022-01-31 23:11:14,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:14,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 23:11:14,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:14,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 23:11:14,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 23:11:14,340 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:14,651 INFO L93 Difference]: Finished difference Result 236 states and 323 transitions. [2022-01-31 23:11:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 23:11:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 23:11:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:14,653 INFO L225 Difference]: With dead ends: 236 [2022-01-31 23:11:14,653 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 23:11:14,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2022-01-31 23:11:14,654 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 458 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:14,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 211 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 23:11:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 100. [2022-01-31 23:11:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 94 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2022-01-31 23:11:14,662 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 91 [2022-01-31 23:11:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:14,662 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2022-01-31 23:11:14,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2022-01-31 23:11:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 23:11:14,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:14,665 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:14,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 23:11:14,665 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:14,665 INFO L85 PathProgramCache]: Analyzing trace with hash 145878707, now seen corresponding path program 20 times [2022-01-31 23:11:14,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:14,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710997493] [2022-01-31 23:11:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:14,672 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:14,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:14,676 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:15,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:15,028 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 23:11:15,029 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:15,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710997493] [2022-01-31 23:11:15,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1710997493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:15,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:15,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 23:11:15,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714642789] [2022-01-31 23:11:15,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:15,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 23:11:15,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:15,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 23:11:15,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 23:11:15,030 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:15,324 INFO L93 Difference]: Finished difference Result 246 states and 337 transitions. [2022-01-31 23:11:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 23:11:15,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 23:11:15,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:15,328 INFO L225 Difference]: With dead ends: 246 [2022-01-31 23:11:15,328 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 23:11:15,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2022-01-31 23:11:15,330 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 483 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:15,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 218 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 23:11:15,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 104. [2022-01-31 23:11:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 98 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2022-01-31 23:11:15,338 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 95 [2022-01-31 23:11:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:15,338 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2022-01-31 23:11:15,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:15,341 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2022-01-31 23:11:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 23:11:15,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:15,342 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:15,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 23:11:15,343 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:15,343 INFO L85 PathProgramCache]: Analyzing trace with hash 791994350, now seen corresponding path program 21 times [2022-01-31 23:11:15,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:15,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125835967] [2022-01-31 23:11:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:15,352 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:15,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:15,356 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:15,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:15,731 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 23:11:15,732 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125835967] [2022-01-31 23:11:15,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1125835967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:15,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:15,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 23:11:15,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315857879] [2022-01-31 23:11:15,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:15,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 23:11:15,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 23:11:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 23:11:15,733 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand has 25 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:16,030 INFO L93 Difference]: Finished difference Result 256 states and 351 transitions. [2022-01-31 23:11:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 23:11:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 23:11:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:16,032 INFO L225 Difference]: With dead ends: 256 [2022-01-31 23:11:16,032 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 23:11:16,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 23:11:16,033 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 443 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:16,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 229 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 23:11:16,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 108. [2022-01-31 23:11:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 102 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 133 transitions. [2022-01-31 23:11:16,040 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 133 transitions. Word has length 99 [2022-01-31 23:11:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:16,040 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 133 transitions. [2022-01-31 23:11:16,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 133 transitions. [2022-01-31 23:11:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 23:11:16,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:16,041 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:16,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 23:11:16,041 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:16,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:16,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1944667223, now seen corresponding path program 22 times [2022-01-31 23:11:16,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:16,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443057143] [2022-01-31 23:11:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:16,046 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:16,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:16,048 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:16,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:16,418 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 23:11:16,418 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:16,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443057143] [2022-01-31 23:11:16,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [443057143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:16,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:16,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 23:11:16,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539201707] [2022-01-31 23:11:16,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:16,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 23:11:16,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:16,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 23:11:16,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 23:11:16,421 INFO L87 Difference]: Start difference. First operand 108 states and 133 transitions. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 25 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:16,737 INFO L93 Difference]: Finished difference Result 266 states and 365 transitions. [2022-01-31 23:11:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 23:11:16,737 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 25 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 23:11:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:16,739 INFO L225 Difference]: With dead ends: 266 [2022-01-31 23:11:16,739 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 23:11:16,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2022-01-31 23:11:16,740 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 479 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:16,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 239 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:11:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 23:11:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 112. [2022-01-31 23:11:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.2547169811320755) internal successors, (133), 106 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-01-31 23:11:16,746 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 103 [2022-01-31 23:11:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:16,747 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-01-31 23:11:16,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 25 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-01-31 23:11:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 23:11:16,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:16,748 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:16,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 23:11:16,748 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1461829148, now seen corresponding path program 23 times [2022-01-31 23:11:16,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:16,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801131908] [2022-01-31 23:11:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:16,756 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:16,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:16,760 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:17,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:17,144 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 23:11:17,144 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:17,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801131908] [2022-01-31 23:11:17,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801131908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:17,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:17,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 23:11:17,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063076029] [2022-01-31 23:11:17,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:17,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 23:11:17,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 23:11:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 23:11:17,146 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 26 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:17,503 INFO L93 Difference]: Finished difference Result 276 states and 379 transitions. [2022-01-31 23:11:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 23:11:17,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 26 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 23:11:17,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:17,505 INFO L225 Difference]: With dead ends: 276 [2022-01-31 23:11:17,505 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 23:11:17,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2022-01-31 23:11:17,506 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 543 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:17,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 241 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 23:11:17,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 116. [2022-01-31 23:11:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.2545454545454546) internal successors, (138), 110 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2022-01-31 23:11:17,513 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 107 [2022-01-31 23:11:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:17,513 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2022-01-31 23:11:17,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 26 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2022-01-31 23:11:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 23:11:17,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:17,514 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:17,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 23:11:17,514 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:17,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:17,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1840394911, now seen corresponding path program 24 times [2022-01-31 23:11:17,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:17,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750278675] [2022-01-31 23:11:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:17,520 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:17,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:17,524 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:17,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:17,940 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 23:11:17,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:17,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750278675] [2022-01-31 23:11:17,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [750278675] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:17,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:17,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 23:11:17,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786650414] [2022-01-31 23:11:17,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:17,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 23:11:17,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:17,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 23:11:17,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 23:11:17,942 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 28 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 27 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:18,330 INFO L93 Difference]: Finished difference Result 286 states and 393 transitions. [2022-01-31 23:11:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 23:11:18,331 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 27 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 23:11:18,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:18,332 INFO L225 Difference]: With dead ends: 286 [2022-01-31 23:11:18,333 INFO L226 Difference]: Without dead ends: 273 [2022-01-31 23:11:18,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:11:18,334 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 622 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:18,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 246 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-31 23:11:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 120. [2022-01-31 23:11:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.2543859649122806) internal successors, (143), 114 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2022-01-31 23:11:18,342 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 111 [2022-01-31 23:11:18,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:18,343 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2022-01-31 23:11:18,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 27 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2022-01-31 23:11:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 23:11:18,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:18,344 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:18,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 23:11:18,344 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:18,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:18,344 INFO L85 PathProgramCache]: Analyzing trace with hash -782676518, now seen corresponding path program 25 times [2022-01-31 23:11:18,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:18,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475465442] [2022-01-31 23:11:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:18,348 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:18,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:18,352 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:18,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:18,791 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 23:11:18,791 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:18,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475465442] [2022-01-31 23:11:18,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1475465442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:18,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:18,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 23:11:18,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062645497] [2022-01-31 23:11:18,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:18,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 23:11:18,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:18,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 23:11:18,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:11:18,795 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand has 29 states, 29 states have (on average 3.8275862068965516) internal successors, (111), 28 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:19,145 INFO L93 Difference]: Finished difference Result 296 states and 407 transitions. [2022-01-31 23:11:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 23:11:19,146 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.8275862068965516) internal successors, (111), 28 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 23:11:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:19,148 INFO L225 Difference]: With dead ends: 296 [2022-01-31 23:11:19,148 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 23:11:19,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2022-01-31 23:11:19,149 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 647 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:19,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 257 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:19,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 23:11:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 124. [2022-01-31 23:11:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.2542372881355932) internal successors, (148), 118 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 153 transitions. [2022-01-31 23:11:19,160 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 153 transitions. Word has length 115 [2022-01-31 23:11:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:19,160 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 153 transitions. [2022-01-31 23:11:19,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.8275862068965516) internal successors, (111), 28 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 153 transitions. [2022-01-31 23:11:19,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 23:11:19,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:19,161 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:19,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 23:11:19,162 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:19,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:19,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1992666219, now seen corresponding path program 26 times [2022-01-31 23:11:19,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:19,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523553771] [2022-01-31 23:11:19,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:19,166 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:19,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:19,171 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:19,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:19,608 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 23:11:19,608 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:19,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523553771] [2022-01-31 23:11:19,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [523553771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:19,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:19,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 23:11:19,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088297495] [2022-01-31 23:11:19,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:19,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 23:11:19,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:19,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 23:11:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 23:11:19,610 INFO L87 Difference]: Start difference. First operand 124 states and 153 transitions. Second operand has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 29 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:20,015 INFO L93 Difference]: Finished difference Result 306 states and 421 transitions. [2022-01-31 23:11:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 23:11:20,016 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 29 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 23:11:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:20,018 INFO L225 Difference]: With dead ends: 306 [2022-01-31 23:11:20,018 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 23:11:20,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2022-01-31 23:11:20,019 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 622 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:20,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 278 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:20,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 23:11:20,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 128. [2022-01-31 23:11:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.2540983606557377) internal successors, (153), 122 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2022-01-31 23:11:20,026 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 119 [2022-01-31 23:11:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:20,026 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2022-01-31 23:11:20,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 29 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2022-01-31 23:11:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 23:11:20,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:20,027 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:20,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 23:11:20,028 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:20,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:20,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1185152048, now seen corresponding path program 27 times [2022-01-31 23:11:20,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:20,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313075472] [2022-01-31 23:11:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:20,032 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:20,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:20,036 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:20,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:20,499 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 23:11:20,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:20,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313075472] [2022-01-31 23:11:20,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [313075472] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:20,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:20,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 23:11:20,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81902453] [2022-01-31 23:11:20,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:20,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 23:11:20,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:20,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 23:11:20,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 23:11:20,501 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 30 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:20,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:20,911 INFO L93 Difference]: Finished difference Result 316 states and 435 transitions. [2022-01-31 23:11:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 23:11:20,912 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 30 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 23:11:20,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:20,914 INFO L225 Difference]: With dead ends: 316 [2022-01-31 23:11:20,914 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 23:11:20,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2022-01-31 23:11:20,915 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 770 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:20,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 270 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 23:11:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 132. [2022-01-31 23:11:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.253968253968254) internal successors, (158), 126 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2022-01-31 23:11:20,922 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 123 [2022-01-31 23:11:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:20,922 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2022-01-31 23:11:20,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 30 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2022-01-31 23:11:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 23:11:20,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:20,923 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:20,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 23:11:20,923 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:20,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1536876917, now seen corresponding path program 28 times [2022-01-31 23:11:20,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:20,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479266039] [2022-01-31 23:11:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:20,927 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:20,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:20,932 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:21,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:21,447 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 23:11:21,447 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479266039] [2022-01-31 23:11:21,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479266039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:21,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:21,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 23:11:21,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698103510] [2022-01-31 23:11:21,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:21,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 23:11:21,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:21,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 23:11:21,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 23:11:21,449 INFO L87 Difference]: Start difference. First operand 132 states and 163 transitions. Second operand has 32 states, 32 states have (on average 3.84375) internal successors, (123), 31 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:21,853 INFO L93 Difference]: Finished difference Result 326 states and 449 transitions. [2022-01-31 23:11:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 23:11:21,854 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.84375) internal successors, (123), 31 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-01-31 23:11:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:21,855 INFO L225 Difference]: With dead ends: 326 [2022-01-31 23:11:21,855 INFO L226 Difference]: Without dead ends: 313 [2022-01-31 23:11:21,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 23:11:21,856 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 798 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:21,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 276 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-31 23:11:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 136. [2022-01-31 23:11:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.2538461538461538) internal successors, (163), 130 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 168 transitions. [2022-01-31 23:11:21,863 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 168 transitions. Word has length 127 [2022-01-31 23:11:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:21,863 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 168 transitions. [2022-01-31 23:11:21,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.84375) internal successors, (123), 31 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:21,864 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 168 transitions. [2022-01-31 23:11:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 23:11:21,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:21,865 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:21,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 23:11:21,865 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:21,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1536975814, now seen corresponding path program 29 times [2022-01-31 23:11:21,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:21,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767183487] [2022-01-31 23:11:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:21,869 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:21,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:21,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:22,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:22,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:22,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767183487] [2022-01-31 23:11:22,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767183487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:22,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:22,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 23:11:22,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652042245] [2022-01-31 23:11:22,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:22,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 23:11:22,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:22,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 23:11:22,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 23:11:22,407 INFO L87 Difference]: Start difference. First operand 136 states and 168 transitions. Second operand has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 32 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:22,835 INFO L93 Difference]: Finished difference Result 336 states and 463 transitions. [2022-01-31 23:11:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 23:11:22,836 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 32 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 23:11:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:22,837 INFO L225 Difference]: With dead ends: 336 [2022-01-31 23:11:22,838 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 23:11:22,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 23:11:22,839 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 507 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:22,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 327 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:22,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 23:11:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 140. [2022-01-31 23:11:22,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.2537313432835822) internal successors, (168), 134 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 173 transitions. [2022-01-31 23:11:22,847 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 173 transitions. Word has length 131 [2022-01-31 23:11:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:22,847 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 173 transitions. [2022-01-31 23:11:22,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 32 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:22,847 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 173 transitions. [2022-01-31 23:11:22,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 23:11:22,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:22,848 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:22,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 23:11:22,849 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1860735873, now seen corresponding path program 30 times [2022-01-31 23:11:22,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:22,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353379197] [2022-01-31 23:11:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:22,853 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:22,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:22,859 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:23,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:23,406 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:23,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353379197] [2022-01-31 23:11:23,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1353379197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:23,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:23,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 23:11:23,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581098390] [2022-01-31 23:11:23,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:23,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 23:11:23,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 23:11:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 23:11:23,408 INFO L87 Difference]: Start difference. First operand 140 states and 173 transitions. Second operand has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 33 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:23,869 INFO L93 Difference]: Finished difference Result 346 states and 477 transitions. [2022-01-31 23:11:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 23:11:23,870 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 33 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 23:11:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:23,872 INFO L225 Difference]: With dead ends: 346 [2022-01-31 23:11:23,872 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 23:11:23,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 23:11:23,874 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 717 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:23,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 310 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 23:11:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 144. [2022-01-31 23:11:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.2536231884057971) internal successors, (173), 138 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 178 transitions. [2022-01-31 23:11:23,884 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 178 transitions. Word has length 135 [2022-01-31 23:11:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:23,884 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 178 transitions. [2022-01-31 23:11:23,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 33 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 178 transitions. [2022-01-31 23:11:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 23:11:23,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:23,885 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:23,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 23:11:23,885 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:23,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1664062020, now seen corresponding path program 31 times [2022-01-31 23:11:23,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:23,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174897064] [2022-01-31 23:11:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:23,890 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:23,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:23,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:24,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:24,485 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 23:11:24,485 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:24,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174897064] [2022-01-31 23:11:24,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [174897064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:24,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:24,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 23:11:24,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695242852] [2022-01-31 23:11:24,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:24,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 23:11:24,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:24,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 23:11:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 23:11:24,487 INFO L87 Difference]: Start difference. First operand 144 states and 178 transitions. Second operand has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 34 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:24,949 INFO L93 Difference]: Finished difference Result 356 states and 491 transitions. [2022-01-31 23:11:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 23:11:24,950 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 34 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 23:11:24,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:24,952 INFO L225 Difference]: With dead ends: 356 [2022-01-31 23:11:24,952 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 23:11:24,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 23:11:24,954 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 696 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:24,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 306 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 23:11:24,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 148. [2022-01-31 23:11:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.2535211267605635) internal successors, (178), 142 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 183 transitions. [2022-01-31 23:11:24,962 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 183 transitions. Word has length 139 [2022-01-31 23:11:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:24,963 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 183 transitions. [2022-01-31 23:11:24,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 34 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 183 transitions. [2022-01-31 23:11:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 23:11:24,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:24,964 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:24,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 23:11:24,964 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:24,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2105888137, now seen corresponding path program 32 times [2022-01-31 23:11:24,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:24,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526117801] [2022-01-31 23:11:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:24,969 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:24,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:24,974 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:25,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:25,559 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 23:11:25,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:25,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526117801] [2022-01-31 23:11:25,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [526117801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:25,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:25,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 23:11:25,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114724798] [2022-01-31 23:11:25,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:25,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 23:11:25,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:25,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 23:11:25,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 23:11:25,561 INFO L87 Difference]: Start difference. First operand 148 states and 183 transitions. Second operand has 36 states, 36 states have (on average 3.861111111111111) internal successors, (139), 35 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:26,038 INFO L93 Difference]: Finished difference Result 366 states and 505 transitions. [2022-01-31 23:11:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 23:11:26,039 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.861111111111111) internal successors, (139), 35 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 23:11:26,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:26,041 INFO L225 Difference]: With dead ends: 366 [2022-01-31 23:11:26,041 INFO L226 Difference]: Without dead ends: 353 [2022-01-31 23:11:26,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:11:26,042 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 733 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:26,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 335 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:26,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-31 23:11:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 152. [2022-01-31 23:11:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.2534246575342465) internal successors, (183), 146 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 188 transitions. [2022-01-31 23:11:26,049 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 188 transitions. Word has length 143 [2022-01-31 23:11:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:26,050 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 188 transitions. [2022-01-31 23:11:26,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.861111111111111) internal successors, (139), 35 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:26,050 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 188 transitions. [2022-01-31 23:11:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 23:11:26,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:26,051 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:26,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 23:11:26,052 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1269703090, now seen corresponding path program 33 times [2022-01-31 23:11:26,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:26,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180262796] [2022-01-31 23:11:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:26,056 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:26,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:26,061 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:26,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:26,705 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 23:11:26,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:26,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180262796] [2022-01-31 23:11:26,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [180262796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:26,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:26,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 23:11:26,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511209820] [2022-01-31 23:11:26,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:26,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 23:11:26,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:26,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 23:11:26,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:11:26,707 INFO L87 Difference]: Start difference. First operand 152 states and 188 transitions. Second operand has 37 states, 37 states have (on average 3.864864864864865) internal successors, (143), 36 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:27,142 INFO L93 Difference]: Finished difference Result 376 states and 519 transitions. [2022-01-31 23:11:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 23:11:27,143 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.864864864864865) internal successors, (143), 36 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 23:11:27,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:27,145 INFO L225 Difference]: With dead ends: 376 [2022-01-31 23:11:27,145 INFO L226 Difference]: Without dead ends: 363 [2022-01-31 23:11:27,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:11:27,146 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 600 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:27,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 369 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-31 23:11:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 156. [2022-01-31 23:11:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.2533333333333334) internal successors, (188), 150 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 193 transitions. [2022-01-31 23:11:27,154 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 193 transitions. Word has length 147 [2022-01-31 23:11:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:27,154 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 193 transitions. [2022-01-31 23:11:27,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.864864864864865) internal successors, (143), 36 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 193 transitions. [2022-01-31 23:11:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 23:11:27,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:27,156 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:27,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 23:11:27,156 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:27,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1657895789, now seen corresponding path program 34 times [2022-01-31 23:11:27,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:27,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878353933] [2022-01-31 23:11:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:27,161 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:27,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:27,166 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:27,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:27,850 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 23:11:27,850 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:27,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878353933] [2022-01-31 23:11:27,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [878353933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:27,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:27,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 23:11:27,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382602148] [2022-01-31 23:11:27,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:27,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 23:11:27,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:27,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 23:11:27,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:11:27,852 INFO L87 Difference]: Start difference. First operand 156 states and 193 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 37 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:28,354 INFO L93 Difference]: Finished difference Result 386 states and 533 transitions. [2022-01-31 23:11:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 23:11:28,355 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 37 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-01-31 23:11:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:28,356 INFO L225 Difference]: With dead ends: 386 [2022-01-31 23:11:28,356 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 23:11:28,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:11:28,358 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 725 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:28,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 339 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 23:11:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 160. [2022-01-31 23:11:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.2532467532467533) internal successors, (193), 154 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 198 transitions. [2022-01-31 23:11:28,365 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 198 transitions. Word has length 151 [2022-01-31 23:11:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:28,365 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 198 transitions. [2022-01-31 23:11:28,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 37 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 198 transitions. [2022-01-31 23:11:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 23:11:28,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:28,366 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:28,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 23:11:28,367 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:28,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:28,367 INFO L85 PathProgramCache]: Analyzing trace with hash 552304552, now seen corresponding path program 35 times [2022-01-31 23:11:28,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:28,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158448248] [2022-01-31 23:11:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:28,379 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:28,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:28,385 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:29,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:29,135 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:29,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158448248] [2022-01-31 23:11:29,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1158448248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:29,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:29,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 23:11:29,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539572689] [2022-01-31 23:11:29,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:29,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 23:11:29,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:29,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 23:11:29,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:11:29,138 INFO L87 Difference]: Start difference. First operand 160 states and 198 transitions. Second operand has 39 states, 39 states have (on average 3.871794871794872) internal successors, (151), 38 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:29,569 INFO L93 Difference]: Finished difference Result 396 states and 547 transitions. [2022-01-31 23:11:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 23:11:29,571 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.871794871794872) internal successors, (151), 38 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 23:11:29,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:29,573 INFO L225 Difference]: With dead ends: 396 [2022-01-31 23:11:29,573 INFO L226 Difference]: Without dead ends: 383 [2022-01-31 23:11:29,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:11:29,575 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 975 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:29,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 346 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:11:29,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-31 23:11:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 164. [2022-01-31 23:11:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.2531645569620253) internal successors, (198), 158 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2022-01-31 23:11:29,582 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 155 [2022-01-31 23:11:29,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:29,583 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2022-01-31 23:11:29,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.871794871794872) internal successors, (151), 38 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2022-01-31 23:11:29,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 23:11:29,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:29,584 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:29,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 23:11:29,584 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:29,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:29,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2107829859, now seen corresponding path program 36 times [2022-01-31 23:11:29,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:29,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027794120] [2022-01-31 23:11:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:29,588 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:29,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:29,594 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:30,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:30,301 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 23:11:30,301 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:30,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027794120] [2022-01-31 23:11:30,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027794120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:30,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:30,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 23:11:30,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184377529] [2022-01-31 23:11:30,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:30,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 23:11:30,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:30,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 23:11:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:11:30,303 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand has 40 states, 40 states have (on average 3.875) internal successors, (155), 39 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:30,775 INFO L93 Difference]: Finished difference Result 406 states and 561 transitions. [2022-01-31 23:11:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 23:11:30,776 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.875) internal successors, (155), 39 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 23:11:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:30,778 INFO L225 Difference]: With dead ends: 406 [2022-01-31 23:11:30,778 INFO L226 Difference]: Without dead ends: 393 [2022-01-31 23:11:30,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=783, Invalid=857, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 23:11:30,779 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 831 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:30,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 373 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:30,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-31 23:11:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 168. [2022-01-31 23:11:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.2530864197530864) internal successors, (203), 162 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2022-01-31 23:11:30,790 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 159 [2022-01-31 23:11:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:30,790 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2022-01-31 23:11:30,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.875) internal successors, (155), 39 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2022-01-31 23:11:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 23:11:30,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:30,792 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:30,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 23:11:30,792 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:30,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1086421090, now seen corresponding path program 37 times [2022-01-31 23:11:30,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:30,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063727725] [2022-01-31 23:11:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:30,797 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:30,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:30,803 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:31,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:31,572 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 23:11:31,572 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:31,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063727725] [2022-01-31 23:11:31,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1063727725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:31,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:31,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 23:11:31,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933363298] [2022-01-31 23:11:31,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:31,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 23:11:31,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:31,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 23:11:31,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 23:11:31,574 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 41 states, 41 states have (on average 3.8780487804878048) internal successors, (159), 40 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:32,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:32,135 INFO L93 Difference]: Finished difference Result 416 states and 575 transitions. [2022-01-31 23:11:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 23:11:32,135 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.8780487804878048) internal successors, (159), 40 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 23:11:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:32,138 INFO L225 Difference]: With dead ends: 416 [2022-01-31 23:11:32,138 INFO L226 Difference]: Without dead ends: 403 [2022-01-31 23:11:32,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=823, Invalid=899, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:11:32,139 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 991 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:32,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 364 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:32,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-31 23:11:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 172. [2022-01-31 23:11:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 166 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 213 transitions. [2022-01-31 23:11:32,148 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 213 transitions. Word has length 163 [2022-01-31 23:11:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:32,148 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 213 transitions. [2022-01-31 23:11:32,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.8780487804878048) internal successors, (159), 40 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 213 transitions. [2022-01-31 23:11:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 23:11:32,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:32,149 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:32,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 23:11:32,149 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:32,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:32,150 INFO L85 PathProgramCache]: Analyzing trace with hash 715459417, now seen corresponding path program 38 times [2022-01-31 23:11:32,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:32,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398378639] [2022-01-31 23:11:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:32,154 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:32,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:32,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:32,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:32,931 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 23:11:32,931 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:32,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398378639] [2022-01-31 23:11:32,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398378639] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:32,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:32,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 23:11:32,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636319206] [2022-01-31 23:11:32,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:32,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 23:11:32,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:32,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 23:11:32,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:11:32,933 INFO L87 Difference]: Start difference. First operand 172 states and 213 transitions. Second operand has 42 states, 42 states have (on average 3.880952380952381) internal successors, (163), 41 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:33,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:33,507 INFO L93 Difference]: Finished difference Result 426 states and 589 transitions. [2022-01-31 23:11:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 23:11:33,508 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.880952380952381) internal successors, (163), 41 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 23:11:33,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:33,510 INFO L225 Difference]: With dead ends: 426 [2022-01-31 23:11:33,510 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 23:11:33,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 23:11:33,512 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 896 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:33,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 377 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 23:11:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 176. [2022-01-31 23:11:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.2529411764705882) internal successors, (213), 170 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 218 transitions. [2022-01-31 23:11:33,520 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 218 transitions. Word has length 167 [2022-01-31 23:11:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:33,520 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 218 transitions. [2022-01-31 23:11:33,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.880952380952381) internal successors, (163), 41 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 218 transitions. [2022-01-31 23:11:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 23:11:33,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:33,521 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:33,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 23:11:33,521 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:33,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1285736044, now seen corresponding path program 39 times [2022-01-31 23:11:33,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:33,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40898382] [2022-01-31 23:11:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:33,526 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:33,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:33,531 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:34,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:34,308 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 23:11:34,308 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:34,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40898382] [2022-01-31 23:11:34,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [40898382] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:34,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:34,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 23:11:34,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372538436] [2022-01-31 23:11:34,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:34,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 23:11:34,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:34,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 23:11:34,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 23:11:34,311 INFO L87 Difference]: Start difference. First operand 176 states and 218 transitions. Second operand has 43 states, 43 states have (on average 3.883720930232558) internal successors, (167), 42 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:34,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:34,855 INFO L93 Difference]: Finished difference Result 436 states and 603 transitions. [2022-01-31 23:11:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 23:11:34,856 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.883720930232558) internal successors, (167), 42 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 23:11:34,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:34,858 INFO L225 Difference]: With dead ends: 436 [2022-01-31 23:11:34,858 INFO L226 Difference]: Without dead ends: 423 [2022-01-31 23:11:34,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=906, Invalid=986, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 23:11:34,859 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 984 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:34,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 385 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:34,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-31 23:11:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 180. [2022-01-31 23:11:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.2528735632183907) internal successors, (218), 174 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 223 transitions. [2022-01-31 23:11:34,868 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 223 transitions. Word has length 171 [2022-01-31 23:11:34,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:34,868 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 223 transitions. [2022-01-31 23:11:34,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.883720930232558) internal successors, (167), 42 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 223 transitions. [2022-01-31 23:11:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 23:11:34,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:34,869 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:34,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 23:11:34,870 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:34,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1416768945, now seen corresponding path program 40 times [2022-01-31 23:11:34,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:34,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930885608] [2022-01-31 23:11:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:34,874 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:34,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:34,880 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:35,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:35,680 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 23:11:35,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:35,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930885608] [2022-01-31 23:11:35,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [930885608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:35,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:35,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 23:11:35,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728642212] [2022-01-31 23:11:35,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:35,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 23:11:35,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:35,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 23:11:35,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 23:11:35,682 INFO L87 Difference]: Start difference. First operand 180 states and 223 transitions. Second operand has 44 states, 44 states have (on average 3.8863636363636362) internal successors, (171), 43 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:36,231 INFO L93 Difference]: Finished difference Result 446 states and 617 transitions. [2022-01-31 23:11:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 23:11:36,232 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.8863636363636362) internal successors, (171), 43 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 23:11:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:36,234 INFO L225 Difference]: With dead ends: 446 [2022-01-31 23:11:36,234 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 23:11:36,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=949, Invalid=1031, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 23:11:36,235 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 869 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:36,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 400 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 23:11:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 184. [2022-01-31 23:11:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.252808988764045) internal successors, (223), 178 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 228 transitions. [2022-01-31 23:11:36,243 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 228 transitions. Word has length 175 [2022-01-31 23:11:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:36,244 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 228 transitions. [2022-01-31 23:11:36,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.8863636363636362) internal successors, (171), 43 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 228 transitions. [2022-01-31 23:11:36,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 23:11:36,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:36,245 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:36,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 23:11:36,245 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:36,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:36,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1945998730, now seen corresponding path program 41 times [2022-01-31 23:11:36,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:36,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412112631] [2022-01-31 23:11:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:36,261 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:36,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:36,268 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:37,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:37,085 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 23:11:37,086 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:37,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412112631] [2022-01-31 23:11:37,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1412112631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:37,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:37,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 23:11:37,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984084004] [2022-01-31 23:11:37,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:37,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 23:11:37,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:37,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 23:11:37,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 23:11:37,088 INFO L87 Difference]: Start difference. First operand 184 states and 228 transitions. Second operand has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:37,671 INFO L93 Difference]: Finished difference Result 456 states and 631 transitions. [2022-01-31 23:11:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 23:11:37,672 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 23:11:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:37,674 INFO L225 Difference]: With dead ends: 456 [2022-01-31 23:11:37,674 INFO L226 Difference]: Without dead ends: 443 [2022-01-31 23:11:37,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=993, Invalid=1077, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 23:11:37,675 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 831 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:37,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 414 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-31 23:11:37,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 188. [2022-01-31 23:11:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.2527472527472527) internal successors, (228), 182 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 233 transitions. [2022-01-31 23:11:37,684 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 233 transitions. Word has length 179 [2022-01-31 23:11:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:37,684 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 233 transitions. [2022-01-31 23:11:37,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:37,685 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 233 transitions. [2022-01-31 23:11:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 23:11:37,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:37,686 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:37,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 23:11:37,686 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:37,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash 739459909, now seen corresponding path program 42 times [2022-01-31 23:11:37,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:37,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145590258] [2022-01-31 23:11:37,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:37,691 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:37,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:37,697 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:38,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:38,536 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 23:11:38,536 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:38,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145590258] [2022-01-31 23:11:38,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [145590258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:38,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:38,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 23:11:38,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988874865] [2022-01-31 23:11:38,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:38,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 23:11:38,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 23:11:38,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 23:11:38,538 INFO L87 Difference]: Start difference. First operand 188 states and 233 transitions. Second operand has 46 states, 46 states have (on average 3.891304347826087) internal successors, (179), 45 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:39,091 INFO L93 Difference]: Finished difference Result 466 states and 645 transitions. [2022-01-31 23:11:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 23:11:39,091 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.891304347826087) internal successors, (179), 45 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 23:11:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:39,093 INFO L225 Difference]: With dead ends: 466 [2022-01-31 23:11:39,093 INFO L226 Difference]: Without dead ends: 453 [2022-01-31 23:11:39,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1038, Invalid=1124, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 23:11:39,094 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1342 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:39,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 417 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:39,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-31 23:11:39,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 192. [2022-01-31 23:11:39,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.2526881720430108) internal successors, (233), 186 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 238 transitions. [2022-01-31 23:11:39,102 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 238 transitions. Word has length 183 [2022-01-31 23:11:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:39,102 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 238 transitions. [2022-01-31 23:11:39,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.891304347826087) internal successors, (179), 45 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:39,103 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 238 transitions. [2022-01-31 23:11:39,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 23:11:39,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:39,104 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:39,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 23:11:39,104 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:39,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:39,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1641388928, now seen corresponding path program 43 times [2022-01-31 23:11:39,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:39,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328057207] [2022-01-31 23:11:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:39,108 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:39,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:39,116 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:40,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:40,065 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 23:11:40,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:40,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328057207] [2022-01-31 23:11:40,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [328057207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:40,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:40,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 23:11:40,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010912814] [2022-01-31 23:11:40,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:40,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 23:11:40,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:40,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 23:11:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 23:11:40,068 INFO L87 Difference]: Start difference. First operand 192 states and 238 transitions. Second operand has 47 states, 47 states have (on average 3.893617021276596) internal successors, (183), 46 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:40,631 INFO L93 Difference]: Finished difference Result 476 states and 659 transitions. [2022-01-31 23:11:40,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 23:11:40,631 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.893617021276596) internal successors, (183), 46 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 23:11:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:40,634 INFO L225 Difference]: With dead ends: 476 [2022-01-31 23:11:40,634 INFO L226 Difference]: Without dead ends: 463 [2022-01-31 23:11:40,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1084, Invalid=1172, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 23:11:40,635 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 1032 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:40,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 437 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-31 23:11:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 196. [2022-01-31 23:11:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.2526315789473683) internal successors, (238), 190 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 243 transitions. [2022-01-31 23:11:40,644 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 243 transitions. Word has length 187 [2022-01-31 23:11:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:40,644 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 243 transitions. [2022-01-31 23:11:40,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.893617021276596) internal successors, (183), 46 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 243 transitions. [2022-01-31 23:11:40,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 23:11:40,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:40,645 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:40,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 23:11:40,645 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1041539525, now seen corresponding path program 44 times [2022-01-31 23:11:40,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:40,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372225101] [2022-01-31 23:11:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:40,650 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:40,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:40,658 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:41,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:41,600 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 23:11:41,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:41,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372225101] [2022-01-31 23:11:41,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [372225101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:41,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:41,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 23:11:41,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284175749] [2022-01-31 23:11:41,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:41,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 23:11:41,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:41,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 23:11:41,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 23:11:41,603 INFO L87 Difference]: Start difference. First operand 196 states and 243 transitions. Second operand has 48 states, 48 states have (on average 3.8958333333333335) internal successors, (187), 47 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:42,263 INFO L93 Difference]: Finished difference Result 486 states and 673 transitions. [2022-01-31 23:11:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 23:11:42,263 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.8958333333333335) internal successors, (187), 47 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 23:11:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:42,265 INFO L225 Difference]: With dead ends: 486 [2022-01-31 23:11:42,265 INFO L226 Difference]: Without dead ends: 473 [2022-01-31 23:11:42,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1131, Invalid=1221, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 23:11:42,266 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 1092 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:42,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 442 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:42,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-01-31 23:11:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 200. [2022-01-31 23:11:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.2525773195876289) internal successors, (243), 194 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2022-01-31 23:11:42,275 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 191 [2022-01-31 23:11:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:42,276 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2022-01-31 23:11:42,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.8958333333333335) internal successors, (187), 47 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2022-01-31 23:11:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 23:11:42,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:42,277 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:42,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 23:11:42,277 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash -946123914, now seen corresponding path program 45 times [2022-01-31 23:11:42,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:42,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398201440] [2022-01-31 23:11:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:42,283 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:42,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:42,291 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:43,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:43,203 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:43,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398201440] [2022-01-31 23:11:43,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398201440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:43,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:43,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 23:11:43,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927716383] [2022-01-31 23:11:43,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:43,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 23:11:43,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:43,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 23:11:43,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 23:11:43,205 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 48 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:43,834 INFO L93 Difference]: Finished difference Result 496 states and 687 transitions. [2022-01-31 23:11:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 23:11:43,835 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 48 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 23:11:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:43,837 INFO L225 Difference]: With dead ends: 496 [2022-01-31 23:11:43,837 INFO L226 Difference]: Without dead ends: 483 [2022-01-31 23:11:43,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 23:11:43,838 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 1393 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:43,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1439 Valid, 421 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:43,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-31 23:11:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 204. [2022-01-31 23:11:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.2525252525252526) internal successors, (248), 198 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 253 transitions. [2022-01-31 23:11:43,848 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 253 transitions. Word has length 195 [2022-01-31 23:11:43,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:43,848 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 253 transitions. [2022-01-31 23:11:43,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 48 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 253 transitions. [2022-01-31 23:11:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 23:11:43,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:43,849 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:43,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 23:11:43,850 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:43,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1825317681, now seen corresponding path program 46 times [2022-01-31 23:11:43,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:43,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190631963] [2022-01-31 23:11:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:43,854 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:43,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:43,863 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:44,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:44,948 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 23:11:44,949 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:44,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190631963] [2022-01-31 23:11:44,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1190631963] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:44,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:44,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 23:11:44,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104190020] [2022-01-31 23:11:44,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:44,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 23:11:44,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:44,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 23:11:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 23:11:44,951 INFO L87 Difference]: Start difference. First operand 204 states and 253 transitions. Second operand has 50 states, 50 states have (on average 3.9) internal successors, (195), 49 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:45,614 INFO L93 Difference]: Finished difference Result 506 states and 701 transitions. [2022-01-31 23:11:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 23:11:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.9) internal successors, (195), 49 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 23:11:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:45,616 INFO L225 Difference]: With dead ends: 506 [2022-01-31 23:11:45,616 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 23:11:45,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 23:11:45,617 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1367 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:45,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 447 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:11:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 23:11:45,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 208. [2022-01-31 23:11:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.2524752475247525) internal successors, (253), 202 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 258 transitions. [2022-01-31 23:11:45,628 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 258 transitions. Word has length 199 [2022-01-31 23:11:45,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:45,628 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 258 transitions. [2022-01-31 23:11:45,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.9) internal successors, (195), 49 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 258 transitions. [2022-01-31 23:11:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 23:11:45,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:45,629 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:45,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 23:11:45,630 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:45,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:45,630 INFO L85 PathProgramCache]: Analyzing trace with hash -637229716, now seen corresponding path program 47 times [2022-01-31 23:11:45,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:45,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961440543] [2022-01-31 23:11:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:45,636 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:45,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:45,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:46,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:46,736 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 23:11:46,736 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:46,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961440543] [2022-01-31 23:11:46,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1961440543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:46,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:46,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 23:11:46,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96509765] [2022-01-31 23:11:46,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:46,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 23:11:46,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:46,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 23:11:46,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 23:11:46,738 INFO L87 Difference]: Start difference. First operand 208 states and 258 transitions. Second operand has 51 states, 51 states have (on average 3.9019607843137254) internal successors, (199), 50 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:47,430 INFO L93 Difference]: Finished difference Result 516 states and 715 transitions. [2022-01-31 23:11:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 23:11:47,431 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.9019607843137254) internal successors, (199), 50 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 23:11:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:47,433 INFO L225 Difference]: With dead ends: 516 [2022-01-31 23:11:47,433 INFO L226 Difference]: Without dead ends: 503 [2022-01-31 23:11:47,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1278, Invalid=1374, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 23:11:47,434 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 963 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:47,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 481 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:11:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-31 23:11:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 212. [2022-01-31 23:11:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.2524271844660195) internal successors, (258), 206 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 263 transitions. [2022-01-31 23:11:47,445 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 263 transitions. Word has length 203 [2022-01-31 23:11:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:47,445 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 263 transitions. [2022-01-31 23:11:47,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.9019607843137254) internal successors, (199), 50 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 263 transitions. [2022-01-31 23:11:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 23:11:47,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:47,447 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:47,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 23:11:47,448 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:47,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:47,449 INFO L85 PathProgramCache]: Analyzing trace with hash 376148519, now seen corresponding path program 48 times [2022-01-31 23:11:47,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:47,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949278683] [2022-01-31 23:11:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:47,453 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:47,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:47,463 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:48,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:48,597 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 23:11:48,597 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:48,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949278683] [2022-01-31 23:11:48,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [949278683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:48,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:48,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 23:11:48,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105103122] [2022-01-31 23:11:48,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:48,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 23:11:48,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:48,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 23:11:48,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 23:11:48,599 INFO L87 Difference]: Start difference. First operand 212 states and 263 transitions. Second operand has 52 states, 52 states have (on average 3.9038461538461537) internal successors, (203), 51 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:49,309 INFO L93 Difference]: Finished difference Result 526 states and 729 transitions. [2022-01-31 23:11:49,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 23:11:49,309 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.9038461538461537) internal successors, (203), 51 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 23:11:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:49,312 INFO L225 Difference]: With dead ends: 526 [2022-01-31 23:11:49,312 INFO L226 Difference]: Without dead ends: 513 [2022-01-31 23:11:49,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1329, Invalid=1427, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 23:11:49,313 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 1248 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:49,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1297 Valid, 462 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:11:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-31 23:11:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 216. [2022-01-31 23:11:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.2523809523809524) internal successors, (263), 210 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2022-01-31 23:11:49,323 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 207 [2022-01-31 23:11:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:49,323 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2022-01-31 23:11:49,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.9038461538461537) internal successors, (203), 51 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2022-01-31 23:11:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 23:11:49,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:49,325 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:49,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 23:11:49,325 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1211651742, now seen corresponding path program 49 times [2022-01-31 23:11:49,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:49,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864298909] [2022-01-31 23:11:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:49,329 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:49,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:49,341 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:50,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:50,589 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 23:11:50,590 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:50,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864298909] [2022-01-31 23:11:50,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1864298909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:50,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:50,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 23:11:50,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476843835] [2022-01-31 23:11:50,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:50,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 23:11:50,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:50,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 23:11:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 23:11:50,592 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 52 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:51,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:51,315 INFO L93 Difference]: Finished difference Result 536 states and 743 transitions. [2022-01-31 23:11:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 23:11:51,316 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 52 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 23:11:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:51,321 INFO L225 Difference]: With dead ends: 536 [2022-01-31 23:11:51,321 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 23:11:51,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 23:11:51,323 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 1098 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:51,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1148 Valid, 493 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:11:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 23:11:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 220. [2022-01-31 23:11:51,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.2523364485981308) internal successors, (268), 214 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:51,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 273 transitions. [2022-01-31 23:11:51,336 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 273 transitions. Word has length 211 [2022-01-31 23:11:51,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:51,336 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 273 transitions. [2022-01-31 23:11:51,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 52 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:51,337 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 273 transitions. [2022-01-31 23:11:51,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 23:11:51,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:51,338 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:51,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 23:11:51,338 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:51,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:51,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1837126883, now seen corresponding path program 50 times [2022-01-31 23:11:51,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:51,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802489183] [2022-01-31 23:11:51,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:51,342 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:51,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:51,352 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:52,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:11:52,522 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:52,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802489183] [2022-01-31 23:11:52,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [802489183] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:52,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:52,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 23:11:52,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10063875] [2022-01-31 23:11:52,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:52,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 23:11:52,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:52,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 23:11:52,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 23:11:52,525 INFO L87 Difference]: Start difference. First operand 220 states and 273 transitions. Second operand has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 53 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:53,259 INFO L93 Difference]: Finished difference Result 546 states and 757 transitions. [2022-01-31 23:11:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 23:11:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 53 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 23:11:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:53,262 INFO L225 Difference]: With dead ends: 546 [2022-01-31 23:11:53,262 INFO L226 Difference]: Without dead ends: 533 [2022-01-31 23:11:53,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1434, Invalid=1536, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 23:11:53,262 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 999 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:53,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 499 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:11:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-31 23:11:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 224. [2022-01-31 23:11:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 218 states have (on average 1.2522935779816513) internal successors, (273), 218 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 278 transitions. [2022-01-31 23:11:53,272 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 278 transitions. Word has length 215 [2022-01-31 23:11:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:53,272 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 278 transitions. [2022-01-31 23:11:53,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 53 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 278 transitions. [2022-01-31 23:11:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 23:11:53,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:53,273 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:53,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 23:11:53,274 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:53,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1771722584, now seen corresponding path program 51 times [2022-01-31 23:11:53,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:53,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008108144] [2022-01-31 23:11:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:53,277 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:53,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:53,289 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:54,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:54,507 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 23:11:54,508 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:54,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008108144] [2022-01-31 23:11:54,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1008108144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:54,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:54,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 23:11:54,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746195137] [2022-01-31 23:11:54,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:54,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 23:11:54,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 23:11:54,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 23:11:54,510 INFO L87 Difference]: Start difference. First operand 224 states and 278 transitions. Second operand has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 54 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:55,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:55,302 INFO L93 Difference]: Finished difference Result 556 states and 771 transitions. [2022-01-31 23:11:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 23:11:55,302 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 54 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 23:11:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:55,304 INFO L225 Difference]: With dead ends: 556 [2022-01-31 23:11:55,304 INFO L226 Difference]: Without dead ends: 543 [2022-01-31 23:11:55,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1488, Invalid=1592, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 23:11:55,305 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 1121 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1173 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:55,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1173 Valid, 506 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:11:55,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-31 23:11:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 228. [2022-01-31 23:11:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 222 states have (on average 1.2522522522522523) internal successors, (278), 222 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 283 transitions. [2022-01-31 23:11:55,314 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 283 transitions. Word has length 219 [2022-01-31 23:11:55,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:55,315 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 283 transitions. [2022-01-31 23:11:55,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 54 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:55,315 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 283 transitions. [2022-01-31 23:11:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 23:11:55,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:55,316 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:55,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 23:11:55,316 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:55,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:55,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1631687149, now seen corresponding path program 52 times [2022-01-31 23:11:55,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:55,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216916024] [2022-01-31 23:11:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:55,321 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:55,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:55,332 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:56,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:56,537 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 23:11:56,538 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:56,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216916024] [2022-01-31 23:11:56,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [216916024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:56,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:56,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 23:11:56,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538860601] [2022-01-31 23:11:56,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:56,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 23:11:56,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:56,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 23:11:56,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 23:11:56,540 INFO L87 Difference]: Start difference. First operand 228 states and 283 transitions. Second operand has 56 states, 56 states have (on average 3.9107142857142856) internal successors, (219), 55 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:57,379 INFO L93 Difference]: Finished difference Result 566 states and 785 transitions. [2022-01-31 23:11:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 23:11:57,379 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.9107142857142856) internal successors, (219), 55 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-01-31 23:11:57,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:57,381 INFO L225 Difference]: With dead ends: 566 [2022-01-31 23:11:57,381 INFO L226 Difference]: Without dead ends: 553 [2022-01-31 23:11:57,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1543, Invalid=1649, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 23:11:57,382 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1532 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:57,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 488 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:11:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-31 23:11:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 232. [2022-01-31 23:11:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.252212389380531) internal successors, (283), 226 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 288 transitions. [2022-01-31 23:11:57,392 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 288 transitions. Word has length 223 [2022-01-31 23:11:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:57,393 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 288 transitions. [2022-01-31 23:11:57,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.9107142857142856) internal successors, (219), 55 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 288 transitions. [2022-01-31 23:11:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 23:11:57,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:57,394 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:57,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 23:11:57,394 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash -499994802, now seen corresponding path program 53 times [2022-01-31 23:11:57,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:57,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125331312] [2022-01-31 23:11:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:57,398 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:57,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:57,408 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:58,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:11:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:11:58,608 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 23:11:58,609 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:11:58,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125331312] [2022-01-31 23:11:58,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1125331312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:11:58,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:11:58,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 23:11:58,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369276347] [2022-01-31 23:11:58,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:11:58,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 23:11:58,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:11:58,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 23:11:58,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 23:11:58,611 INFO L87 Difference]: Start difference. First operand 232 states and 288 transitions. Second operand has 57 states, 57 states have (on average 3.912280701754386) internal successors, (223), 56 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:11:59,458 INFO L93 Difference]: Finished difference Result 576 states and 799 transitions. [2022-01-31 23:11:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 23:11:59,458 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.912280701754386) internal successors, (223), 56 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 23:11:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:11:59,460 INFO L225 Difference]: With dead ends: 576 [2022-01-31 23:11:59,460 INFO L226 Difference]: Without dead ends: 563 [2022-01-31 23:11:59,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1599, Invalid=1707, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 23:11:59,461 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1342 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:11:59,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1396 Valid, 503 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:11:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-31 23:11:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 236. [2022-01-31 23:11:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.2521739130434784) internal successors, (288), 230 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:11:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 293 transitions. [2022-01-31 23:11:59,471 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 293 transitions. Word has length 227 [2022-01-31 23:11:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:11:59,471 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 293 transitions. [2022-01-31 23:11:59,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.912280701754386) internal successors, (223), 56 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:11:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 293 transitions. [2022-01-31 23:11:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 23:11:59,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:11:59,473 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:11:59,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 23:11:59,473 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:11:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:11:59,473 INFO L85 PathProgramCache]: Analyzing trace with hash -488776951, now seen corresponding path program 54 times [2022-01-31 23:11:59,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:11:59,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308716499] [2022-01-31 23:11:59,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:11:59,477 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:11:59,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:11:59,507 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:11:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:00,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:00,730 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308716499] [2022-01-31 23:12:00,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [308716499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:00,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:00,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 23:12:00,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281389279] [2022-01-31 23:12:00,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:00,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 23:12:00,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 23:12:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 23:12:00,732 INFO L87 Difference]: Start difference. First operand 236 states and 293 transitions. Second operand has 58 states, 58 states have (on average 3.913793103448276) internal successors, (227), 57 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:01,598 INFO L93 Difference]: Finished difference Result 586 states and 813 transitions. [2022-01-31 23:12:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 23:12:01,599 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.913793103448276) internal successors, (227), 57 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 23:12:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:01,601 INFO L225 Difference]: With dead ends: 586 [2022-01-31 23:12:01,601 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 23:12:01,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1656, Invalid=1766, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 23:12:01,603 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1517 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:01,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1572 Valid, 523 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:01,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 23:12:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 240. [2022-01-31 23:12:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.2521367521367521) internal successors, (293), 234 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 298 transitions. [2022-01-31 23:12:01,614 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 298 transitions. Word has length 231 [2022-01-31 23:12:01,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:01,614 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 298 transitions. [2022-01-31 23:12:01,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.913793103448276) internal successors, (227), 57 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 298 transitions. [2022-01-31 23:12:01,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 23:12:01,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:01,616 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:01,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 23:12:01,616 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:01,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:01,616 INFO L85 PathProgramCache]: Analyzing trace with hash -28921532, now seen corresponding path program 55 times [2022-01-31 23:12:01,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:01,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426889787] [2022-01-31 23:12:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:01,620 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:01,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:01,634 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:02,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:02,940 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 23:12:02,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:02,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426889787] [2022-01-31 23:12:02,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1426889787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:02,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:02,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 23:12:02,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511366630] [2022-01-31 23:12:02,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:02,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 23:12:02,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:02,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 23:12:02,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 23:12:02,943 INFO L87 Difference]: Start difference. First operand 240 states and 298 transitions. Second operand has 59 states, 59 states have (on average 3.9152542372881354) internal successors, (231), 58 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:03,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:03,789 INFO L93 Difference]: Finished difference Result 596 states and 827 transitions. [2022-01-31 23:12:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 23:12:03,790 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.9152542372881354) internal successors, (231), 58 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 23:12:03,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:03,793 INFO L225 Difference]: With dead ends: 596 [2022-01-31 23:12:03,793 INFO L226 Difference]: Without dead ends: 583 [2022-01-31 23:12:03,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1714, Invalid=1826, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 23:12:03,794 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1473 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:03,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 524 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-31 23:12:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 244. [2022-01-31 23:12:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.2521008403361344) internal successors, (298), 238 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 303 transitions. [2022-01-31 23:12:03,804 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 303 transitions. Word has length 235 [2022-01-31 23:12:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:03,804 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 303 transitions. [2022-01-31 23:12:03,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.9152542372881354) internal successors, (231), 58 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 303 transitions. [2022-01-31 23:12:03,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 23:12:03,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:03,806 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:03,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 23:12:03,806 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash -258739713, now seen corresponding path program 56 times [2022-01-31 23:12:03,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:03,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578554401] [2022-01-31 23:12:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:03,810 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:03,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:03,823 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:05,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:05,168 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 23:12:05,169 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:05,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578554401] [2022-01-31 23:12:05,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1578554401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:05,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:05,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 23:12:05,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557094463] [2022-01-31 23:12:05,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:05,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 23:12:05,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:05,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 23:12:05,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 23:12:05,171 INFO L87 Difference]: Start difference. First operand 244 states and 303 transitions. Second operand has 60 states, 60 states have (on average 3.9166666666666665) internal successors, (235), 59 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:06,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:06,117 INFO L93 Difference]: Finished difference Result 606 states and 841 transitions. [2022-01-31 23:12:06,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 23:12:06,117 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.9166666666666665) internal successors, (235), 59 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-01-31 23:12:06,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:06,119 INFO L225 Difference]: With dead ends: 606 [2022-01-31 23:12:06,119 INFO L226 Difference]: Without dead ends: 593 [2022-01-31 23:12:06,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1773, Invalid=1887, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 23:12:06,120 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1922 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1979 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:06,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1979 Valid, 509 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:06,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-01-31 23:12:06,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 248. [2022-01-31 23:12:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.2520661157024793) internal successors, (303), 242 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 308 transitions. [2022-01-31 23:12:06,130 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 308 transitions. Word has length 239 [2022-01-31 23:12:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:06,130 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 308 transitions. [2022-01-31 23:12:06,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.9166666666666665) internal successors, (235), 59 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:06,131 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 308 transitions. [2022-01-31 23:12:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 23:12:06,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:06,132 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:06,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 23:12:06,132 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:06,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2071175878, now seen corresponding path program 57 times [2022-01-31 23:12:06,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:06,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572541388] [2022-01-31 23:12:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:06,140 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:06,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:06,154 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:07,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:07,494 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 23:12:07,494 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:07,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572541388] [2022-01-31 23:12:07,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [572541388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:07,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:07,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 23:12:07,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755539022] [2022-01-31 23:12:07,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:07,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 23:12:07,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:07,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 23:12:07,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 23:12:07,496 INFO L87 Difference]: Start difference. First operand 248 states and 308 transitions. Second operand has 61 states, 61 states have (on average 3.918032786885246) internal successors, (239), 60 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:08,428 INFO L93 Difference]: Finished difference Result 616 states and 855 transitions. [2022-01-31 23:12:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 23:12:08,429 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.918032786885246) internal successors, (239), 60 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 23:12:08,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:08,431 INFO L225 Difference]: With dead ends: 616 [2022-01-31 23:12:08,431 INFO L226 Difference]: Without dead ends: 603 [2022-01-31 23:12:08,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1833, Invalid=1949, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 23:12:08,432 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1999 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2057 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:08,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2057 Valid, 528 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-31 23:12:08,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 252. [2022-01-31 23:12:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.2520325203252032) internal successors, (308), 246 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 313 transitions. [2022-01-31 23:12:08,440 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 313 transitions. Word has length 243 [2022-01-31 23:12:08,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:08,440 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 313 transitions. [2022-01-31 23:12:08,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.918032786885246) internal successors, (239), 60 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 313 transitions. [2022-01-31 23:12:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 23:12:08,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:08,442 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:08,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 23:12:08,442 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:08,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1133949685, now seen corresponding path program 58 times [2022-01-31 23:12:08,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:08,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114024039] [2022-01-31 23:12:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:08,452 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:08,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:08,466 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:09,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:09,853 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 23:12:09,853 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:09,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114024039] [2022-01-31 23:12:09,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [114024039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:09,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:09,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 23:12:09,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709105722] [2022-01-31 23:12:09,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:09,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 23:12:09,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:09,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 23:12:09,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 23:12:09,855 INFO L87 Difference]: Start difference. First operand 252 states and 313 transitions. Second operand has 62 states, 62 states have (on average 3.9193548387096775) internal successors, (243), 61 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:10,853 INFO L93 Difference]: Finished difference Result 626 states and 869 transitions. [2022-01-31 23:12:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 23:12:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.9193548387096775) internal successors, (243), 61 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-01-31 23:12:10,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:10,857 INFO L225 Difference]: With dead ends: 626 [2022-01-31 23:12:10,857 INFO L226 Difference]: Without dead ends: 613 [2022-01-31 23:12:10,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1894, Invalid=2012, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 23:12:10,858 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1652 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:10,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1711 Valid, 572 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:10,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-31 23:12:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 256. [2022-01-31 23:12:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.252) internal successors, (313), 250 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 318 transitions. [2022-01-31 23:12:10,869 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 318 transitions. Word has length 247 [2022-01-31 23:12:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:10,869 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 318 transitions. [2022-01-31 23:12:10,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.9193548387096775) internal successors, (243), 61 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 318 transitions. [2022-01-31 23:12:10,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 23:12:10,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:10,871 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:10,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 23:12:10,871 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:10,871 INFO L85 PathProgramCache]: Analyzing trace with hash 632927024, now seen corresponding path program 59 times [2022-01-31 23:12:10,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:10,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036481657] [2022-01-31 23:12:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:10,875 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:10,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:10,890 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:12,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:12,408 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 23:12:12,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:12,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036481657] [2022-01-31 23:12:12,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2036481657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:12,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:12,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 23:12:12,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054840178] [2022-01-31 23:12:12,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:12,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 23:12:12,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:12,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 23:12:12,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 23:12:12,411 INFO L87 Difference]: Start difference. First operand 256 states and 318 transitions. Second operand has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 62 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:13,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:13,331 INFO L93 Difference]: Finished difference Result 636 states and 883 transitions. [2022-01-31 23:12:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 23:12:13,332 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 62 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 23:12:13,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:13,334 INFO L225 Difference]: With dead ends: 636 [2022-01-31 23:12:13,334 INFO L226 Difference]: Without dead ends: 623 [2022-01-31 23:12:13,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1956, Invalid=2076, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 23:12:13,335 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1606 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:13,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1666 Valid, 584 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:12:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-31 23:12:13,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 260. [2022-01-31 23:12:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 254 states have (on average 1.2519685039370079) internal successors, (318), 254 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 323 transitions. [2022-01-31 23:12:13,345 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 323 transitions. Word has length 251 [2022-01-31 23:12:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:13,346 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 323 transitions. [2022-01-31 23:12:13,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 62 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 323 transitions. [2022-01-31 23:12:13,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 23:12:13,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:13,347 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:13,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 23:12:13,348 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:13,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1100750315, now seen corresponding path program 60 times [2022-01-31 23:12:13,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:13,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872175483] [2022-01-31 23:12:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:13,361 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:13,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:13,375 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:14,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:14,883 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 23:12:14,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:14,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872175483] [2022-01-31 23:12:14,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [872175483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:14,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:14,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 23:12:14,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539878806] [2022-01-31 23:12:14,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:14,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 23:12:14,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 23:12:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 23:12:14,886 INFO L87 Difference]: Start difference. First operand 260 states and 323 transitions. Second operand has 64 states, 64 states have (on average 3.921875) internal successors, (251), 63 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:15,911 INFO L93 Difference]: Finished difference Result 646 states and 897 transitions. [2022-01-31 23:12:15,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 23:12:15,912 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.921875) internal successors, (251), 63 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 23:12:15,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:15,915 INFO L225 Difference]: With dead ends: 646 [2022-01-31 23:12:15,915 INFO L226 Difference]: Without dead ends: 633 [2022-01-31 23:12:15,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2019, Invalid=2141, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 23:12:15,916 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1724 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1785 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:15,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1785 Valid, 545 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-31 23:12:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 264. [2022-01-31 23:12:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 258 states have (on average 1.251937984496124) internal successors, (323), 258 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 328 transitions. [2022-01-31 23:12:15,926 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 328 transitions. Word has length 255 [2022-01-31 23:12:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:15,927 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 328 transitions. [2022-01-31 23:12:15,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.921875) internal successors, (251), 63 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 328 transitions. [2022-01-31 23:12:15,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 23:12:15,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:15,928 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:15,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 23:12:15,928 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:15,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:15,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2089071398, now seen corresponding path program 61 times [2022-01-31 23:12:15,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:15,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344958128] [2022-01-31 23:12:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:15,933 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:15,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:15,949 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:17,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:17,493 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 23:12:17,493 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:17,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344958128] [2022-01-31 23:12:17,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344958128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:17,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:17,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 23:12:17,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53237300] [2022-01-31 23:12:17,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:17,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 23:12:17,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:17,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 23:12:17,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 23:12:17,496 INFO L87 Difference]: Start difference. First operand 264 states and 328 transitions. Second operand has 65 states, 65 states have (on average 3.923076923076923) internal successors, (255), 64 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:18,565 INFO L93 Difference]: Finished difference Result 656 states and 911 transitions. [2022-01-31 23:12:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 23:12:18,566 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.923076923076923) internal successors, (255), 64 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-01-31 23:12:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:18,568 INFO L225 Difference]: With dead ends: 656 [2022-01-31 23:12:18,568 INFO L226 Difference]: Without dead ends: 643 [2022-01-31 23:12:18,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2083, Invalid=2207, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 23:12:18,569 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1558 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:18,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1620 Valid, 571 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-31 23:12:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 268. [2022-01-31 23:12:18,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.251908396946565) internal successors, (328), 262 states have internal predecessors, (328), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:18,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 333 transitions. [2022-01-31 23:12:18,580 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 333 transitions. Word has length 259 [2022-01-31 23:12:18,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:18,580 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 333 transitions. [2022-01-31 23:12:18,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.923076923076923) internal successors, (255), 64 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:18,581 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 333 transitions. [2022-01-31 23:12:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 23:12:18,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:18,582 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:18,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 23:12:18,582 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash 978989793, now seen corresponding path program 62 times [2022-01-31 23:12:18,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:18,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099052067] [2022-01-31 23:12:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:18,586 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:18,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:18,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:20,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:20,188 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 23:12:20,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:20,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099052067] [2022-01-31 23:12:20,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1099052067] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:20,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:20,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 23:12:20,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722990720] [2022-01-31 23:12:20,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:20,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 23:12:20,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 23:12:20,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 23:12:20,192 INFO L87 Difference]: Start difference. First operand 268 states and 333 transitions. Second operand has 66 states, 66 states have (on average 3.9242424242424243) internal successors, (259), 65 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:21,213 INFO L93 Difference]: Finished difference Result 666 states and 925 transitions. [2022-01-31 23:12:21,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 23:12:21,213 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.9242424242424243) internal successors, (259), 65 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 23:12:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:21,216 INFO L225 Difference]: With dead ends: 666 [2022-01-31 23:12:21,216 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 23:12:21,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2148, Invalid=2274, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 23:12:21,216 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1680 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:21,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1743 Valid, 585 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 23:12:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 272. [2022-01-31 23:12:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.2518796992481203) internal successors, (333), 266 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2022-01-31 23:12:21,227 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 263 [2022-01-31 23:12:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:21,227 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2022-01-31 23:12:21,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.9242424242424243) internal successors, (259), 65 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:21,227 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2022-01-31 23:12:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 23:12:21,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:21,229 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:21,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 23:12:21,229 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:21,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash 228810012, now seen corresponding path program 63 times [2022-01-31 23:12:21,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:21,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82927301] [2022-01-31 23:12:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:21,233 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:21,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:21,246 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:22,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:22,858 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 23:12:22,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:22,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82927301] [2022-01-31 23:12:22,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [82927301] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:22,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:22,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 23:12:22,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653081220] [2022-01-31 23:12:22,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:22,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 23:12:22,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:22,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 23:12:22,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 23:12:22,860 INFO L87 Difference]: Start difference. First operand 272 states and 338 transitions. Second operand has 67 states, 67 states have (on average 3.925373134328358) internal successors, (263), 66 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:23,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:23,925 INFO L93 Difference]: Finished difference Result 676 states and 939 transitions. [2022-01-31 23:12:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 23:12:23,926 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.925373134328358) internal successors, (263), 66 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 23:12:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:23,929 INFO L225 Difference]: With dead ends: 676 [2022-01-31 23:12:23,929 INFO L226 Difference]: Without dead ends: 663 [2022-01-31 23:12:23,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2214, Invalid=2342, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 23:12:23,930 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 2131 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2195 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:23,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2195 Valid, 576 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:23,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-31 23:12:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 276. [2022-01-31 23:12:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 270 states have (on average 1.2518518518518518) internal successors, (338), 270 states have internal predecessors, (338), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 343 transitions. [2022-01-31 23:12:23,939 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 343 transitions. Word has length 267 [2022-01-31 23:12:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:23,939 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 343 transitions. [2022-01-31 23:12:23,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.925373134328358) internal successors, (263), 66 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:23,939 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 343 transitions. [2022-01-31 23:12:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 23:12:23,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:23,940 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:23,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 23:12:23,941 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1736896983, now seen corresponding path program 64 times [2022-01-31 23:12:23,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:23,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027839747] [2022-01-31 23:12:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:23,948 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:23,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:23,964 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:25,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:25,660 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:25,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027839747] [2022-01-31 23:12:25,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027839747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:25,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:25,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 23:12:25,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231053523] [2022-01-31 23:12:25,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:25,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 23:12:25,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:25,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 23:12:25,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 23:12:25,662 INFO L87 Difference]: Start difference. First operand 276 states and 343 transitions. Second operand has 68 states, 68 states have (on average 3.926470588235294) internal successors, (267), 67 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:26,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:26,813 INFO L93 Difference]: Finished difference Result 686 states and 953 transitions. [2022-01-31 23:12:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 23:12:26,814 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.926470588235294) internal successors, (267), 67 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-01-31 23:12:26,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:26,816 INFO L225 Difference]: With dead ends: 686 [2022-01-31 23:12:26,816 INFO L226 Difference]: Without dead ends: 673 [2022-01-31 23:12:26,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2281, Invalid=2411, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 23:12:26,817 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1987 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2052 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:26,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2052 Valid, 598 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:26,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-31 23:12:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 280. [2022-01-31 23:12:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.2518248175182483) internal successors, (343), 274 states have internal predecessors, (343), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 348 transitions. [2022-01-31 23:12:26,828 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 348 transitions. Word has length 271 [2022-01-31 23:12:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:26,828 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 348 transitions. [2022-01-31 23:12:26,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.926470588235294) internal successors, (267), 67 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 348 transitions. [2022-01-31 23:12:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 23:12:26,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:26,830 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:26,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 23:12:26,830 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:26,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:26,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1204531474, now seen corresponding path program 65 times [2022-01-31 23:12:26,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:26,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971219362] [2022-01-31 23:12:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:26,834 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:26,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:26,850 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:28,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:28,569 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 23:12:28,569 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:28,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971219362] [2022-01-31 23:12:28,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [971219362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:28,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:28,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 23:12:28,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525080511] [2022-01-31 23:12:28,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:28,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 23:12:28,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:28,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 23:12:28,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 23:12:28,571 INFO L87 Difference]: Start difference. First operand 280 states and 348 transitions. Second operand has 69 states, 69 states have (on average 3.927536231884058) internal successors, (271), 68 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:29,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:29,696 INFO L93 Difference]: Finished difference Result 696 states and 967 transitions. [2022-01-31 23:12:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 23:12:29,696 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.927536231884058) internal successors, (271), 68 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 23:12:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:29,699 INFO L225 Difference]: With dead ends: 696 [2022-01-31 23:12:29,699 INFO L226 Difference]: Without dead ends: 683 [2022-01-31 23:12:29,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2349, Invalid=2481, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 23:12:29,700 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1691 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1757 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:29,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1757 Valid, 626 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:12:29,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-01-31 23:12:29,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 284. [2022-01-31 23:12:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.2517985611510791) internal successors, (348), 278 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 353 transitions. [2022-01-31 23:12:29,709 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 353 transitions. Word has length 275 [2022-01-31 23:12:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:29,710 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 353 transitions. [2022-01-31 23:12:29,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.927536231884058) internal successors, (271), 68 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:29,710 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 353 transitions. [2022-01-31 23:12:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 23:12:29,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:29,711 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:29,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 23:12:29,711 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:29,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:29,712 INFO L85 PathProgramCache]: Analyzing trace with hash -321365299, now seen corresponding path program 66 times [2022-01-31 23:12:29,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:29,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824755782] [2022-01-31 23:12:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:29,715 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:29,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:29,732 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:32,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:32,343 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 23:12:32,343 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:32,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824755782] [2022-01-31 23:12:32,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [824755782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:32,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:32,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 23:12:32,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943324874] [2022-01-31 23:12:32,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:32,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 23:12:32,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:32,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 23:12:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 23:12:32,346 INFO L87 Difference]: Start difference. First operand 284 states and 353 transitions. Second operand has 71 states, 70 states have (on average 3.9285714285714284) internal successors, (275), 69 states have internal predecessors, (275), 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 23:12:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:33,914 INFO L93 Difference]: Finished difference Result 706 states and 981 transitions. [2022-01-31 23:12:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 23:12:33,915 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.9285714285714284) internal successors, (275), 69 states have internal predecessors, (275), 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) Word has length 279 [2022-01-31 23:12:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:33,917 INFO L225 Difference]: With dead ends: 706 [2022-01-31 23:12:33,917 INFO L226 Difference]: Without dead ends: 693 [2022-01-31 23:12:33,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2493, Invalid=2763, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 23:12:33,918 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1936 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2004 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:33,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2004 Valid, 544 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:12:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-01-31 23:12:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 288. [2022-01-31 23:12:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.25177304964539) internal successors, (353), 282 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 358 transitions. [2022-01-31 23:12:33,944 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 358 transitions. Word has length 279 [2022-01-31 23:12:33,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:33,944 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 358 transitions. [2022-01-31 23:12:33,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.9285714285714284) internal successors, (275), 69 states have internal predecessors, (275), 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 23:12:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 358 transitions. [2022-01-31 23:12:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 23:12:33,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:33,946 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:33,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 23:12:33,946 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:33,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:33,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2085376248, now seen corresponding path program 67 times [2022-01-31 23:12:33,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:33,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827178077] [2022-01-31 23:12:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:33,950 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:33,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:33,965 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:35,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:35,772 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:35,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827178077] [2022-01-31 23:12:35,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [827178077] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:35,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:35,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 23:12:35,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633048373] [2022-01-31 23:12:35,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:35,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 23:12:35,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:35,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 23:12:35,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 23:12:35,774 INFO L87 Difference]: Start difference. First operand 288 states and 358 transitions. Second operand has 71 states, 71 states have (on average 3.9295774647887325) internal successors, (279), 70 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:37,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:37,554 INFO L93 Difference]: Finished difference Result 716 states and 995 transitions. [2022-01-31 23:12:37,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 23:12:37,554 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.9295774647887325) internal successors, (279), 70 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-01-31 23:12:37,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:37,556 INFO L225 Difference]: With dead ends: 716 [2022-01-31 23:12:37,556 INFO L226 Difference]: Without dead ends: 703 [2022-01-31 23:12:37,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2488, Invalid=2624, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 23:12:37,557 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 2276 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2344 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:37,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2344 Valid, 615 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:12:37,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-31 23:12:37,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 292. [2022-01-31 23:12:37,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.2517482517482517) internal successors, (358), 286 states have internal predecessors, (358), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 363 transitions. [2022-01-31 23:12:37,584 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 363 transitions. Word has length 283 [2022-01-31 23:12:37,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:37,585 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 363 transitions. [2022-01-31 23:12:37,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.9295774647887325) internal successors, (279), 70 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:37,585 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 363 transitions. [2022-01-31 23:12:37,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 23:12:37,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:37,586 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:37,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 23:12:37,586 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:37,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:37,587 INFO L85 PathProgramCache]: Analyzing trace with hash -670798397, now seen corresponding path program 68 times [2022-01-31 23:12:37,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:37,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715165633] [2022-01-31 23:12:37,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:37,590 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:37,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:37,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:39,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:39,519 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 23:12:39,519 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:39,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715165633] [2022-01-31 23:12:39,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1715165633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:39,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:39,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 23:12:39,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531053470] [2022-01-31 23:12:39,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:39,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 23:12:39,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:39,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 23:12:39,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 23:12:39,521 INFO L87 Difference]: Start difference. First operand 292 states and 363 transitions. Second operand has 72 states, 72 states have (on average 3.9305555555555554) internal successors, (283), 71 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:41,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:41,712 INFO L93 Difference]: Finished difference Result 726 states and 1009 transitions. [2022-01-31 23:12:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 23:12:41,713 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.9305555555555554) internal successors, (283), 71 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-01-31 23:12:41,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:41,715 INFO L225 Difference]: With dead ends: 726 [2022-01-31 23:12:41,715 INFO L226 Difference]: Without dead ends: 713 [2022-01-31 23:12:41,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2559, Invalid=2697, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 23:12:41,716 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1997 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2066 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:41,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2066 Valid, 646 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:12:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-01-31 23:12:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 296. [2022-01-31 23:12:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.2517241379310344) internal successors, (363), 290 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 368 transitions. [2022-01-31 23:12:41,755 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 368 transitions. Word has length 287 [2022-01-31 23:12:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:41,755 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 368 transitions. [2022-01-31 23:12:41,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.9305555555555554) internal successors, (283), 71 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 368 transitions. [2022-01-31 23:12:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 23:12:41,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:41,757 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:41,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 23:12:41,758 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:41,758 INFO L85 PathProgramCache]: Analyzing trace with hash 68245246, now seen corresponding path program 69 times [2022-01-31 23:12:41,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:41,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761668808] [2022-01-31 23:12:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:41,764 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:41,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:41,780 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:43,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:43,825 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 23:12:43,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:43,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761668808] [2022-01-31 23:12:43,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1761668808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:43,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:43,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 23:12:43,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594754033] [2022-01-31 23:12:43,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:43,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 23:12:43,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:43,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 23:12:43,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 23:12:43,827 INFO L87 Difference]: Start difference. First operand 296 states and 368 transitions. Second operand has 73 states, 73 states have (on average 3.9315068493150687) internal successors, (287), 72 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:46,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:46,482 INFO L93 Difference]: Finished difference Result 736 states and 1023 transitions. [2022-01-31 23:12:46,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 23:12:46,483 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.9315068493150687) internal successors, (287), 72 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 23:12:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:46,484 INFO L225 Difference]: With dead ends: 736 [2022-01-31 23:12:46,485 INFO L226 Difference]: Without dead ends: 723 [2022-01-31 23:12:46,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2631, Invalid=2771, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 23:12:46,485 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 2273 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2343 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:46,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2343 Valid, 633 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:12:46,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-01-31 23:12:46,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 300. [2022-01-31 23:12:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 294 states have (on average 1.251700680272109) internal successors, (368), 294 states have internal predecessors, (368), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:46,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 373 transitions. [2022-01-31 23:12:46,525 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 373 transitions. Word has length 291 [2022-01-31 23:12:46,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:46,525 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 373 transitions. [2022-01-31 23:12:46,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.9315068493150687) internal successors, (287), 72 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:46,525 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 373 transitions. [2022-01-31 23:12:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 23:12:46,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:46,527 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:46,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 23:12:46,527 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:46,527 INFO L85 PathProgramCache]: Analyzing trace with hash 549530297, now seen corresponding path program 70 times [2022-01-31 23:12:46,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:46,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677696195] [2022-01-31 23:12:46,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:46,530 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:46,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:46,545 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:48,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:12:48,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677696195] [2022-01-31 23:12:48,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [677696195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:48,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:48,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 23:12:48,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224212290] [2022-01-31 23:12:48,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:48,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 23:12:48,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 23:12:48,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 23:12:48,443 INFO L87 Difference]: Start difference. First operand 300 states and 373 transitions. Second operand has 74 states, 74 states have (on average 3.9324324324324325) internal successors, (291), 73 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:51,373 INFO L93 Difference]: Finished difference Result 746 states and 1037 transitions. [2022-01-31 23:12:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 23:12:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.9324324324324325) internal successors, (291), 73 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2022-01-31 23:12:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:51,376 INFO L225 Difference]: With dead ends: 746 [2022-01-31 23:12:51,376 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 23:12:51,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2704, Invalid=2846, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 23:12:51,377 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1664 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:51,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 669 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:12:51,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 23:12:51,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 304. [2022-01-31 23:12:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.2516778523489933) internal successors, (373), 298 states have internal predecessors, (373), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 378 transitions. [2022-01-31 23:12:51,428 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 378 transitions. Word has length 295 [2022-01-31 23:12:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:51,429 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 378 transitions. [2022-01-31 23:12:51,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.9324324324324325) internal successors, (291), 73 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 378 transitions. [2022-01-31 23:12:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 23:12:51,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:51,430 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:51,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 23:12:51,430 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:51,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:51,431 INFO L85 PathProgramCache]: Analyzing trace with hash -174413580, now seen corresponding path program 71 times [2022-01-31 23:12:51,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:51,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533401701] [2022-01-31 23:12:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:51,434 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:51,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:51,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:53,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:53,397 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 23:12:53,397 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:53,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533401701] [2022-01-31 23:12:53,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [533401701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:53,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:53,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 23:12:53,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877071560] [2022-01-31 23:12:53,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:53,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 23:12:53,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 23:12:53,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 23:12:53,400 INFO L87 Difference]: Start difference. First operand 304 states and 378 transitions. Second operand has 75 states, 75 states have (on average 3.933333333333333) internal successors, (295), 74 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:57,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:12:57,311 INFO L93 Difference]: Finished difference Result 756 states and 1051 transitions. [2022-01-31 23:12:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 23:12:57,311 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.933333333333333) internal successors, (295), 74 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 23:12:57,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:12:57,313 INFO L225 Difference]: With dead ends: 756 [2022-01-31 23:12:57,313 INFO L226 Difference]: Without dead ends: 743 [2022-01-31 23:12:57,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2778, Invalid=2922, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 23:12:57,313 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 2087 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2159 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:12:57,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2159 Valid, 657 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:12:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-31 23:12:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 308. [2022-01-31 23:12:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 302 states have (on average 1.2516556291390728) internal successors, (378), 302 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:12:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 383 transitions. [2022-01-31 23:12:57,387 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 383 transitions. Word has length 299 [2022-01-31 23:12:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:12:57,388 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 383 transitions. [2022-01-31 23:12:57,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.933333333333333) internal successors, (295), 74 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:12:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 383 transitions. [2022-01-31 23:12:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 23:12:57,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:12:57,389 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:12:57,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 23:12:57,390 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:12:57,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:12:57,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1463512657, now seen corresponding path program 72 times [2022-01-31 23:12:57,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:12:57,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310231549] [2022-01-31 23:12:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:12:57,393 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:12:57,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:12:57,413 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:12:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:59,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:12:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:12:59,389 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 23:12:59,389 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:12:59,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310231549] [2022-01-31 23:12:59,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [310231549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:12:59,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:12:59,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 23:12:59,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775187626] [2022-01-31 23:12:59,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:12:59,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 23:12:59,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:12:59,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 23:12:59,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 23:12:59,391 INFO L87 Difference]: Start difference. First operand 308 states and 383 transitions. Second operand has 76 states, 76 states have (on average 3.9342105263157894) internal successors, (299), 75 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:04,582 INFO L93 Difference]: Finished difference Result 766 states and 1065 transitions. [2022-01-31 23:13:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 23:13:04,583 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.9342105263157894) internal successors, (299), 75 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2022-01-31 23:13:04,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:04,585 INFO L225 Difference]: With dead ends: 766 [2022-01-31 23:13:04,585 INFO L226 Difference]: Without dead ends: 753 [2022-01-31 23:13:04,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2853, Invalid=2999, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 23:13:04,585 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 2321 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2394 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:04,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2394 Valid, 668 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:04,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-01-31 23:13:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 312. [2022-01-31 23:13:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 306 states have (on average 1.2516339869281046) internal successors, (383), 306 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 388 transitions. [2022-01-31 23:13:04,673 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 388 transitions. Word has length 303 [2022-01-31 23:13:04,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:04,673 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 388 transitions. [2022-01-31 23:13:04,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.9342105263157894) internal successors, (299), 75 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 388 transitions. [2022-01-31 23:13:04,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 23:13:04,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:04,674 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:04,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 23:13:04,675 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:04,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:04,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1862640874, now seen corresponding path program 73 times [2022-01-31 23:13:04,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:04,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756132197] [2022-01-31 23:13:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:04,678 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:04,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:04,698 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:06,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:06,751 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 23:13:06,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:06,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756132197] [2022-01-31 23:13:06,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [756132197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:06,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:06,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 23:13:06,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947523083] [2022-01-31 23:13:06,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:06,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 23:13:06,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:06,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 23:13:06,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 23:13:06,754 INFO L87 Difference]: Start difference. First operand 312 states and 388 transitions. Second operand has 77 states, 77 states have (on average 3.935064935064935) internal successors, (303), 76 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:13,719 INFO L93 Difference]: Finished difference Result 776 states and 1079 transitions. [2022-01-31 23:13:13,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 23:13:13,720 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.935064935064935) internal successors, (303), 76 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 307 [2022-01-31 23:13:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:13,721 INFO L225 Difference]: With dead ends: 776 [2022-01-31 23:13:13,722 INFO L226 Difference]: Without dead ends: 763 [2022-01-31 23:13:13,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2929, Invalid=3077, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 23:13:13,723 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 2247 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2321 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:13,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2321 Valid, 668 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-01-31 23:13:13,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 316. [2022-01-31 23:13:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 310 states have (on average 1.2516129032258065) internal successors, (388), 310 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 393 transitions. [2022-01-31 23:13:13,875 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 393 transitions. Word has length 307 [2022-01-31 23:13:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:13,876 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 393 transitions. [2022-01-31 23:13:13,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.935064935064935) internal successors, (303), 76 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 393 transitions. [2022-01-31 23:13:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 23:13:13,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:13,877 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:13,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 23:13:13,878 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1002742437, now seen corresponding path program 74 times [2022-01-31 23:13:13,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:13,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402268706] [2022-01-31 23:13:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:13,882 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:13,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:13,902 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,241 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 23:13:16,241 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:16,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402268706] [2022-01-31 23:13:16,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1402268706] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:16,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:16,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 23:13:16,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860949909] [2022-01-31 23:13:16,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:16,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 23:13:16,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:16,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 23:13:16,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 23:13:16,243 INFO L87 Difference]: Start difference. First operand 316 states and 393 transitions. Second operand has 78 states, 78 states have (on average 3.9358974358974357) internal successors, (307), 77 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:24,789 INFO L93 Difference]: Finished difference Result 786 states and 1093 transitions. [2022-01-31 23:13:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 23:13:24,789 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.9358974358974357) internal successors, (307), 77 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-01-31 23:13:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:24,791 INFO L225 Difference]: With dead ends: 786 [2022-01-31 23:13:24,791 INFO L226 Difference]: Without dead ends: 773 [2022-01-31 23:13:24,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3006, Invalid=3156, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 23:13:24,791 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1950 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2025 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:24,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2025 Valid, 690 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-31 23:13:24,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 320. [2022-01-31 23:13:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 314 states have (on average 1.2515923566878981) internal successors, (393), 314 states have internal predecessors, (393), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 398 transitions. [2022-01-31 23:13:24,951 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 398 transitions. Word has length 311 [2022-01-31 23:13:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:24,952 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 398 transitions. [2022-01-31 23:13:24,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.9358974358974357) internal successors, (307), 77 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:24,952 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 398 transitions. [2022-01-31 23:13:24,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 23:13:24,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:24,953 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:24,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 23:13:24,954 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:24,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:24,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1896368864, now seen corresponding path program 75 times [2022-01-31 23:13:24,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:24,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042837798] [2022-01-31 23:13:24,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:24,957 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:24,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:24,979 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:27,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:27,102 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 23:13:27,102 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:27,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042837798] [2022-01-31 23:13:27,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042837798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:27,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:27,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 23:13:27,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225156677] [2022-01-31 23:13:27,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:27,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 23:13:27,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:27,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 23:13:27,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 23:13:27,105 INFO L87 Difference]: Start difference. First operand 320 states and 398 transitions. Second operand has 79 states, 79 states have (on average 3.9367088607594938) internal successors, (311), 78 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:38,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:38,408 INFO L93 Difference]: Finished difference Result 796 states and 1107 transitions. [2022-01-31 23:13:38,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 23:13:38,408 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.9367088607594938) internal successors, (311), 78 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 23:13:38,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:38,410 INFO L225 Difference]: With dead ends: 796 [2022-01-31 23:13:38,410 INFO L226 Difference]: Without dead ends: 783 [2022-01-31 23:13:38,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3084, Invalid=3236, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 23:13:38,410 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 2013 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:38,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2089 Valid, 691 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-01-31 23:13:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 324. [2022-01-31 23:13:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 318 states have (on average 1.251572327044025) internal successors, (398), 318 states have internal predecessors, (398), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 403 transitions. [2022-01-31 23:13:38,671 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 403 transitions. Word has length 315 [2022-01-31 23:13:38,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:38,672 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 403 transitions. [2022-01-31 23:13:38,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.9367088607594938) internal successors, (311), 78 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:38,672 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 403 transitions. [2022-01-31 23:13:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-01-31 23:13:38,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:38,673 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:38,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 23:13:38,674 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:38,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:38,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1888002661, now seen corresponding path program 76 times [2022-01-31 23:13:38,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:38,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689723350] [2022-01-31 23:13:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:38,679 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:38,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:38,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,901 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 23:13:40,901 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:40,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689723350] [2022-01-31 23:13:40,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689723350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:40,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:40,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 23:13:40,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114706657] [2022-01-31 23:13:40,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:40,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 23:13:40,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:40,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 23:13:40,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 23:13:40,903 INFO L87 Difference]: Start difference. First operand 324 states and 403 transitions. Second operand has 80 states, 80 states have (on average 3.9375) internal successors, (315), 79 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:55,223 INFO L93 Difference]: Finished difference Result 806 states and 1121 transitions. [2022-01-31 23:13:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 23:13:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.9375) internal successors, (315), 79 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 319 [2022-01-31 23:13:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:55,225 INFO L225 Difference]: With dead ends: 806 [2022-01-31 23:13:55,225 INFO L226 Difference]: Without dead ends: 793 [2022-01-31 23:13:55,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3163, Invalid=3317, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 23:13:55,226 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 2047 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2124 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:55,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2124 Valid, 732 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-01-31 23:13:55,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 328. [2022-01-31 23:13:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 322 states have (on average 1.2515527950310559) internal successors, (403), 322 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:13:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 408 transitions. [2022-01-31 23:13:55,477 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 408 transitions. Word has length 319 [2022-01-31 23:13:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:55,477 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 408 transitions. [2022-01-31 23:13:55,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.9375) internal successors, (315), 79 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:13:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 408 transitions. [2022-01-31 23:13:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-31 23:13:55,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:55,479 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:55,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 23:13:55,479 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:55,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:55,479 INFO L85 PathProgramCache]: Analyzing trace with hash -430400810, now seen corresponding path program 77 times [2022-01-31 23:13:55,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:55,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826124644] [2022-01-31 23:13:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:55,483 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:13:55,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:55,498 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,788 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 23:13:57,788 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:57,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826124644] [2022-01-31 23:13:57,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [826124644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:57,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:57,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 23:13:57,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434255999] [2022-01-31 23:13:57,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:57,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 23:13:57,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:57,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 23:13:57,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 23:13:57,790 INFO L87 Difference]: Start difference. First operand 328 states and 408 transitions. Second operand has 81 states, 81 states have (on average 3.9382716049382718) internal successors, (319), 80 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:17,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:17,461 INFO L93 Difference]: Finished difference Result 816 states and 1135 transitions. [2022-01-31 23:14:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 23:14:17,461 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.9382716049382718) internal successors, (319), 80 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 323 [2022-01-31 23:14:17,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:17,463 INFO L225 Difference]: With dead ends: 816 [2022-01-31 23:14:17,463 INFO L226 Difference]: Without dead ends: 803 [2022-01-31 23:14:17,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3243, Invalid=3399, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 23:14:17,464 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1930 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:17,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2008 Valid, 728 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:14:17,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-31 23:14:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 332. [2022-01-31 23:14:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 326 states have (on average 1.2515337423312884) internal successors, (408), 326 states have internal predecessors, (408), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:14:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 413 transitions. [2022-01-31 23:14:17,767 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 413 transitions. Word has length 323 [2022-01-31 23:14:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:17,767 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 413 transitions. [2022-01-31 23:14:17,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.9382716049382718) internal successors, (319), 80 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 413 transitions. [2022-01-31 23:14:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 23:14:17,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:17,769 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:17,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 23:14:17,769 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:17,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1133691537, now seen corresponding path program 78 times [2022-01-31 23:14:17,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:17,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166842224] [2022-01-31 23:14:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:17,773 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:14:17,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:17,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,291 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 23:14:20,292 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:20,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166842224] [2022-01-31 23:14:20,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1166842224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:20,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:20,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 23:14:20,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177877756] [2022-01-31 23:14:20,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:20,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 23:14:20,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:20,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 23:14:20,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 23:14:20,294 INFO L87 Difference]: Start difference. First operand 332 states and 413 transitions. Second operand has 82 states, 82 states have (on average 3.9390243902439024) internal successors, (323), 81 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:44,010 INFO L93 Difference]: Finished difference Result 826 states and 1149 transitions. [2022-01-31 23:14:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 23:14:44,011 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.9390243902439024) internal successors, (323), 81 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 327 [2022-01-31 23:14:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:44,012 INFO L225 Difference]: With dead ends: 826 [2022-01-31 23:14:44,012 INFO L226 Difference]: Without dead ends: 813 [2022-01-31 23:14:44,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3324, Invalid=3482, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 23:14:44,013 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 2172 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:44,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2251 Valid, 721 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:14:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-01-31 23:14:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 336. [2022-01-31 23:14:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 330 states have (on average 1.2515151515151515) internal successors, (413), 330 states have internal predecessors, (413), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:14:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 418 transitions. [2022-01-31 23:14:44,380 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 418 transitions. Word has length 327 [2022-01-31 23:14:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:44,381 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 418 transitions. [2022-01-31 23:14:44,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.9390243902439024) internal successors, (323), 81 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:14:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 418 transitions. [2022-01-31 23:14:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 23:14:44,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:44,382 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:44,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 23:14:44,382 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:44,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:44,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1548970804, now seen corresponding path program 79 times [2022-01-31 23:14:44,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:44,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865250104] [2022-01-31 23:14:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:44,385 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:14:44,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:44,400 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,720 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 23:14:46,720 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865250104] [2022-01-31 23:14:46,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [865250104] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:46,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:46,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 23:14:46,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450542551] [2022-01-31 23:14:46,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:46,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 23:14:46,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:46,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 23:14:46,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 23:14:46,723 INFO L87 Difference]: Start difference. First operand 336 states and 418 transitions. Second operand has 83 states, 83 states have (on average 3.9397590361445785) internal successors, (327), 82 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:16,671 INFO L93 Difference]: Finished difference Result 836 states and 1163 transitions. [2022-01-31 23:15:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 23:15:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.9397590361445785) internal successors, (327), 82 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 331 [2022-01-31 23:15:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:16,673 INFO L225 Difference]: With dead ends: 836 [2022-01-31 23:15:16,673 INFO L226 Difference]: Without dead ends: 823 [2022-01-31 23:15:16,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3406, Invalid=3566, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 23:15:16,673 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 2223 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2303 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:16,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2303 Valid, 733 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:15:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-01-31 23:15:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 340. [2022-01-31 23:15:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 334 states have (on average 1.251497005988024) internal successors, (418), 334 states have internal predecessors, (418), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:15:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 423 transitions. [2022-01-31 23:15:17,131 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 423 transitions. Word has length 331 [2022-01-31 23:15:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:17,131 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 423 transitions. [2022-01-31 23:15:17,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.9397590361445785) internal successors, (327), 82 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 423 transitions. [2022-01-31 23:15:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-31 23:15:17,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:17,132 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:17,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 23:15:17,133 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash -506670713, now seen corresponding path program 80 times [2022-01-31 23:15:17,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:17,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139564254] [2022-01-31 23:15:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:17,136 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:15:17,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:17,153 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:19,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:15:19,532 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:19,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139564254] [2022-01-31 23:15:19,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2139564254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:19,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:19,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 23:15:19,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063916632] [2022-01-31 23:15:19,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:19,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 23:15:19,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:19,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 23:15:19,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 23:15:19,534 INFO L87 Difference]: Start difference. First operand 340 states and 423 transitions. Second operand has 84 states, 84 states have (on average 3.9404761904761907) internal successors, (331), 83 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:56,388 INFO L93 Difference]: Finished difference Result 846 states and 1177 transitions. [2022-01-31 23:15:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 23:15:56,389 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.9404761904761907) internal successors, (331), 83 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 335 [2022-01-31 23:15:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:56,390 INFO L225 Difference]: With dead ends: 846 [2022-01-31 23:15:56,390 INFO L226 Difference]: Without dead ends: 833 [2022-01-31 23:15:56,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3489, Invalid=3651, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 23:15:56,391 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 2380 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2461 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:56,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2461 Valid, 744 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:15:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-01-31 23:15:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 344. [2022-01-31 23:15:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 338 states have (on average 1.2514792899408285) internal successors, (423), 338 states have internal predecessors, (423), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:15:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 428 transitions. [2022-01-31 23:15:56,873 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 428 transitions. Word has length 335 [2022-01-31 23:15:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:56,873 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 428 transitions. [2022-01-31 23:15:56,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.9404761904761907) internal successors, (331), 83 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:15:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 428 transitions. [2022-01-31 23:15:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 23:15:56,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:56,875 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:56,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 23:15:56,875 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:56,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1740257474, now seen corresponding path program 81 times [2022-01-31 23:15:56,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:56,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579100139] [2022-01-31 23:15:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:56,879 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:15:56,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:56,896 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:59,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:59,371 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 23:15:59,371 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:59,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579100139] [2022-01-31 23:15:59,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [579100139] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:59,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:59,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 23:15:59,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497161831] [2022-01-31 23:15:59,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:59,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 23:15:59,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:59,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 23:15:59,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 23:15:59,374 INFO L87 Difference]: Start difference. First operand 344 states and 428 transitions. Second operand has 85 states, 85 states have (on average 3.9411764705882355) internal successors, (335), 84 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:39,086 INFO L93 Difference]: Finished difference Result 856 states and 1191 transitions. [2022-01-31 23:16:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 23:16:39,086 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.9411764705882355) internal successors, (335), 84 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 339 [2022-01-31 23:16:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:39,088 INFO L225 Difference]: With dead ends: 856 [2022-01-31 23:16:39,088 INFO L226 Difference]: Without dead ends: 843 [2022-01-31 23:16:39,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3573, Invalid=3737, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 23:16:39,088 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 2210 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2292 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:39,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2292 Valid, 767 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:16:39,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-01-31 23:16:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 348. [2022-01-31 23:16:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 342 states have (on average 1.2514619883040936) internal successors, (428), 342 states have internal predecessors, (428), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:16:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 433 transitions. [2022-01-31 23:16:39,572 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 433 transitions. Word has length 339 [2022-01-31 23:16:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:39,572 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 433 transitions. [2022-01-31 23:16:39,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.9411764705882355) internal successors, (335), 84 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:16:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 433 transitions. [2022-01-31 23:16:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-01-31 23:16:39,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:39,574 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:39,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 23:16:39,574 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:39,575 INFO L85 PathProgramCache]: Analyzing trace with hash -572814723, now seen corresponding path program 82 times [2022-01-31 23:16:39,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:39,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48481833] [2022-01-31 23:16:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:39,578 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:16:39,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:39,600 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:42,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:42,192 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 23:16:42,192 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:42,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48481833] [2022-01-31 23:16:42,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [48481833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:42,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:42,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 23:16:42,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563858986] [2022-01-31 23:16:42,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:42,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 23:16:42,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:42,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 23:16:42,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 23:16:42,195 INFO L87 Difference]: Start difference. First operand 348 states and 433 transitions. Second operand has 86 states, 86 states have (on average 3.941860465116279) internal successors, (339), 85 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:23,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:23,712 INFO L93 Difference]: Finished difference Result 866 states and 1205 transitions. [2022-01-31 23:17:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 23:17:23,713 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.941860465116279) internal successors, (339), 85 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 343 [2022-01-31 23:17:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:23,714 INFO L225 Difference]: With dead ends: 866 [2022-01-31 23:17:23,714 INFO L226 Difference]: Without dead ends: 853 [2022-01-31 23:17:23,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3658, Invalid=3824, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 23:17:23,715 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 2655 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2738 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 760 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:23,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2738 Valid, 769 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:17:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-31 23:17:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 352. [2022-01-31 23:17:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.2514450867052023) internal successors, (433), 346 states have internal predecessors, (433), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:17:24,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 438 transitions. [2022-01-31 23:17:24,233 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 438 transitions. Word has length 343 [2022-01-31 23:17:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:24,233 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 438 transitions. [2022-01-31 23:17:24,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.941860465116279) internal successors, (339), 85 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:17:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 438 transitions. [2022-01-31 23:17:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 23:17:24,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:24,234 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:24,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 23:17:24,234 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:24,235 INFO L85 PathProgramCache]: Analyzing trace with hash -617118024, now seen corresponding path program 83 times [2022-01-31 23:17:24,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:24,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201398239] [2022-01-31 23:17:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:24,239 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:17:24,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:24,256 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:26,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:26,761 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 23:17:26,761 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:26,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201398239] [2022-01-31 23:17:26,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1201398239] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:26,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:26,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 23:17:26,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107454280] [2022-01-31 23:17:26,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:26,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 23:17:26,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:26,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 23:17:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 23:17:26,764 INFO L87 Difference]: Start difference. First operand 352 states and 438 transitions. Second operand has 87 states, 87 states have (on average 3.942528735632184) internal successors, (343), 86 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:10,776 INFO L93 Difference]: Finished difference Result 876 states and 1219 transitions. [2022-01-31 23:18:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 23:18:10,777 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.942528735632184) internal successors, (343), 86 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 347 [2022-01-31 23:18:10,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:10,779 INFO L225 Difference]: With dead ends: 876 [2022-01-31 23:18:10,779 INFO L226 Difference]: Without dead ends: 863 [2022-01-31 23:18:10,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3744, Invalid=3912, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 23:18:10,780 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 2472 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2556 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:10,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2556 Valid, 750 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:18:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-01-31 23:18:11,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 356. [2022-01-31 23:18:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 350 states have (on average 1.2514285714285713) internal successors, (438), 350 states have internal predecessors, (438), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:18:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 443 transitions. [2022-01-31 23:18:11,420 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 443 transitions. Word has length 347 [2022-01-31 23:18:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:11,421 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 443 transitions. [2022-01-31 23:18:11,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.942528735632184) internal successors, (343), 86 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:18:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 443 transitions. [2022-01-31 23:18:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 23:18:11,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:11,422 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:11,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 23:18:11,422 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:11,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1787499149, now seen corresponding path program 84 times [2022-01-31 23:18:11,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:11,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846133450] [2022-01-31 23:18:11,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:11,425 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:18:11,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:11,451 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:14,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:18:14,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:14,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846133450] [2022-01-31 23:18:14,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1846133450] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:14,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:14,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 23:18:14,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638332095] [2022-01-31 23:18:14,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:14,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 23:18:14,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 23:18:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 23:18:14,033 INFO L87 Difference]: Start difference. First operand 356 states and 443 transitions. Second operand has 88 states, 88 states have (on average 3.9431818181818183) internal successors, (347), 87 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:19:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:09,288 INFO L93 Difference]: Finished difference Result 886 states and 1233 transitions. [2022-01-31 23:19:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 23:19:09,289 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.9431818181818183) internal successors, (347), 87 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 351 [2022-01-31 23:19:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:09,290 INFO L225 Difference]: With dead ends: 886 [2022-01-31 23:19:09,290 INFO L226 Difference]: Without dead ends: 873 [2022-01-31 23:19:09,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3831, Invalid=4001, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 23:19:09,291 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 2505 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2590 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:09,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2590 Valid, 776 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:19:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-01-31 23:19:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 360. [2022-01-31 23:19:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.2514124293785311) internal successors, (443), 354 states have internal predecessors, (443), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:19:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 448 transitions. [2022-01-31 23:19:09,986 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 448 transitions. Word has length 351 [2022-01-31 23:19:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:09,986 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 448 transitions. [2022-01-31 23:19:09,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.9431818181818183) internal successors, (347), 87 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:19:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 448 transitions. [2022-01-31 23:19:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 23:19:09,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:09,988 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:09,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 23:19:09,988 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:09,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1864728914, now seen corresponding path program 85 times [2022-01-31 23:19:09,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:09,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583305672] [2022-01-31 23:19:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:09,990 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:19:09,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:10,009 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:12,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:19:12,698 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:12,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583305672] [2022-01-31 23:19:12,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583305672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:12,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:12,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 23:19:12,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491518215] [2022-01-31 23:19:12,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:12,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 23:19:12,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 23:19:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 23:19:12,701 INFO L87 Difference]: Start difference. First operand 360 states and 448 transitions. Second operand has 89 states, 89 states have (on average 3.943820224719101) internal successors, (351), 88 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:20:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:12,624 INFO L93 Difference]: Finished difference Result 896 states and 1247 transitions. [2022-01-31 23:20:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 23:20:12,624 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.943820224719101) internal successors, (351), 88 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 355 [2022-01-31 23:20:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:12,626 INFO L225 Difference]: With dead ends: 896 [2022-01-31 23:20:12,626 INFO L226 Difference]: Without dead ends: 883 [2022-01-31 23:20:12,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3919, Invalid=4091, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 23:20:12,627 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 2531 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2617 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:12,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2617 Valid, 779 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [722 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:20:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-31 23:20:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 364. [2022-01-31 23:20:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.2513966480446927) internal successors, (448), 358 states have internal predecessors, (448), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:20:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 453 transitions. [2022-01-31 23:20:13,441 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 453 transitions. Word has length 355 [2022-01-31 23:20:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:13,441 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 453 transitions. [2022-01-31 23:20:13,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.943820224719101) internal successors, (351), 88 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:20:13,441 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 453 transitions. [2022-01-31 23:20:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-01-31 23:20:13,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:13,442 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:13,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 23:20:13,442 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:13,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1347353193, now seen corresponding path program 86 times [2022-01-31 23:20:13,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:13,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755732148] [2022-01-31 23:20:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:13,445 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:20:13,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:13,464 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:16,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:16,146 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 23:20:16,146 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:16,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755732148] [2022-01-31 23:20:16,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [755732148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:16,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:16,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 23:20:16,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622638723] [2022-01-31 23:20:16,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:16,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 23:20:16,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:16,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 23:20:16,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 23:20:16,148 INFO L87 Difference]: Start difference. First operand 364 states and 453 transitions. Second operand has 90 states, 90 states have (on average 3.9444444444444446) internal successors, (355), 89 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:21:26,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:21:26,360 INFO L93 Difference]: Finished difference Result 906 states and 1261 transitions. [2022-01-31 23:21:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 23:21:26,360 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.9444444444444446) internal successors, (355), 89 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 359 [2022-01-31 23:21:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:21:26,362 INFO L225 Difference]: With dead ends: 906 [2022-01-31 23:21:26,362 INFO L226 Difference]: Without dead ends: 893 [2022-01-31 23:21:26,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4008, Invalid=4182, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 23:21:26,363 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 2437 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2524 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:21:26,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2524 Valid, 786 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:21:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-31 23:21:27,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 368. [2022-01-31 23:21:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 362 states have (on average 1.2513812154696133) internal successors, (453), 362 states have internal predecessors, (453), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:21:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 458 transitions. [2022-01-31 23:21:27,394 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 458 transitions. Word has length 359 [2022-01-31 23:21:27,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:21:27,395 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 458 transitions. [2022-01-31 23:21:27,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.9444444444444446) internal successors, (355), 89 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:21:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 458 transitions. [2022-01-31 23:21:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 23:21:27,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:21:27,396 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:21:27,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 23:21:27,396 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:21:27,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:21:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash 89727140, now seen corresponding path program 87 times [2022-01-31 23:21:27,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:21:27,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981602480] [2022-01-31 23:21:27,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:21:27,399 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:21:27,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:21:27,420 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:21:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:30,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:30,267 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 23:21:30,267 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:30,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981602480] [2022-01-31 23:21:30,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [981602480] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:30,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:30,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 23:21:30,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433788157] [2022-01-31 23:21:30,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:30,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 23:21:30,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:30,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 23:21:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 23:21:30,269 INFO L87 Difference]: Start difference. First operand 368 states and 458 transitions. Second operand has 91 states, 91 states have (on average 3.9450549450549453) internal successors, (359), 90 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:22:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:57,818 INFO L93 Difference]: Finished difference Result 916 states and 1275 transitions. [2022-01-31 23:22:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 23:22:57,819 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.9450549450549453) internal successors, (359), 90 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 363 [2022-01-31 23:22:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:57,820 INFO L225 Difference]: With dead ends: 916 [2022-01-31 23:22:57,820 INFO L226 Difference]: Without dead ends: 903 [2022-01-31 23:22:57,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4098, Invalid=4274, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 23:22:57,821 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 2776 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2864 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:57,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2864 Valid, 809 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:22:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-01-31 23:22:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 372. [2022-01-31 23:22:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 366 states have (on average 1.2513661202185793) internal successors, (458), 366 states have internal predecessors, (458), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 23:22:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 463 transitions. [2022-01-31 23:22:58,935 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 463 transitions. Word has length 363 [2022-01-31 23:22:58,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:58,936 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 463 transitions. [2022-01-31 23:22:58,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.9450549450549453) internal successors, (359), 90 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 23:22:58,936 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 463 transitions. [2022-01-31 23:22:58,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-01-31 23:22:58,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:58,937 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:58,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 23:22:58,937 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1075818847, now seen corresponding path program 88 times [2022-01-31 23:22:58,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:58,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381030494] [2022-01-31 23:22:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:58,940 INFO L92 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Could not compute Simultaneous Update! [2022-01-31 23:22:58,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:58,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:02,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:23:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:02,082 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 23:23:02,082 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:23:02,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381030494] [2022-01-31 23:23:02,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381030494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:23:02,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:23:02,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 23:23:02,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140045014] [2022-01-31 23:23:02,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:23:02,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 23:23:02,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:23:02,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 23:23:02,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 23:23:02,085 INFO L87 Difference]: Start difference. First operand 372 states and 463 transitions. Second operand has 92 states, 92 states have (on average 3.9456521739130435) internal successors, (363), 91 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)