/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:38:52,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:38:52,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:38:52,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:38:52,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:38:52,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:38:52,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:38:52,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:38:52,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:38:52,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:38:52,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:38:52,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:38:52,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:38:52,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:38:52,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:38:52,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:38:52,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:38:52,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:38:52,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:38:52,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:38:52,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:38:52,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:38:52,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:38:52,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:38:52,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:38:52,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:38:52,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:38:52,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:38:52,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:38:52,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:38:52,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:38:52,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:38:52,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:38:52,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:38:52,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:38:52,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:38:52,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:38:52,582 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:38:52,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:38:52,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:38:52,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:38:52,584 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:38:52,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:38:52,584 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:38:52,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:38:52,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:38:52,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:38:52,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:38:52,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:38:52,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:38:52,586 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:38:52,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:38:52,586 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:38:52,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:38:52,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:38:52,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:38:52,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:38:52,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:38:52,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:38:52,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:38:52,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:38:52,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:38:52,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:38:52,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:38:52,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:38:52,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:38:52,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:38:52,858 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:38:52,871 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:38:52,875 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:38:52,877 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:38:52,878 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:38:52,879 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:38:52,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a377e6730/8ea7bea9a0504208b6f431367c0b728f/FLAG93fdabd3b [2020-07-07 11:38:53,725 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:38:53,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:38:53,764 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a377e6730/8ea7bea9a0504208b6f431367c0b728f/FLAG93fdabd3b [2020-07-07 11:38:53,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a377e6730/8ea7bea9a0504208b6f431367c0b728f [2020-07-07 11:38:53,856 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:38:53,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:38:53,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:38:53,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:38:53,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:38:53,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:38:53" (1/1) ... [2020-07-07 11:38:53,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141b4095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:53, skipping insertion in model container [2020-07-07 11:38:53,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:38:53" (1/1) ... [2020-07-07 11:38:53,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:38:54,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:38:55,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:38:55,600 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:38:56,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:38:56,855 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:38:56,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:56 WrapperNode [2020-07-07 11:38:56,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:38:56,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:38:56,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:38:56,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:38:56,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:56" (1/1) ... [2020-07-07 11:38:56,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:56" (1/1) ... [2020-07-07 11:38:56,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:56" (1/1) ... [2020-07-07 11:38:56,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:56" (1/1) ... [2020-07-07 11:38:57,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:56" (1/1) ... [2020-07-07 11:38:57,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:56" (1/1) ... [2020-07-07 11:38:57,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:56" (1/1) ... [2020-07-07 11:38:57,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:38:57,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:38:57,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:38:57,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:38:57,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:38:57,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:38:57,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:38:57,240 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:38:57,240 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:38:57,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:38:57,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 11:38:57,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-07 11:38:57,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 11:38:57,241 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-07 11:38:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:38:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:38:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-07 11:38:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-07 11:38:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-07 11:38:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-07 11:38:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-07 11:38:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-07 11:38:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-07 11:38:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-07 11:38:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-07 11:38:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:38:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:38:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:39:01,764 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:39:01,764 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:39:01,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:39:01 BoogieIcfgContainer [2020-07-07 11:39:01,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:39:01,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:39:01,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:39:01,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:39:01,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:38:53" (1/3) ... [2020-07-07 11:39:01,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cefea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:39:01, skipping insertion in model container [2020-07-07 11:39:01,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:56" (2/3) ... [2020-07-07 11:39:01,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cefea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:39:01, skipping insertion in model container [2020-07-07 11:39:01,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:39:01" (3/3) ... [2020-07-07 11:39:01,786 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:39:01,800 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:39:01,810 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:39:01,826 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:39:01,859 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:39:01,860 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:39:01,860 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:39:01,860 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:39:01,860 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:39:01,860 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:39:01,860 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:39:01,861 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:39:01,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-07-07 11:39:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-07 11:39:01,941 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:39:01,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:39:01,943 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:39:01,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:39:01,956 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-07-07 11:39:01,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:39:01,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316774842] [2020-07-07 11:39:01,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:39:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:04,438 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:39:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:39:04,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316774842] [2020-07-07 11:39:04,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:39:04,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:39:04,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091817026] [2020-07-07 11:39:04,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:39:04,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:39:04,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:39:04,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:04,749 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 4 states. [2020-07-07 11:39:05,597 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 383 [2020-07-07 11:39:15,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:39:15,408 INFO L93 Difference]: Finished difference Result 2262 states and 4032 transitions. [2020-07-07 11:39:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:39:15,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-07 11:39:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:39:15,476 INFO L225 Difference]: With dead ends: 2262 [2020-07-07 11:39:15,476 INFO L226 Difference]: Without dead ends: 1993 [2020-07-07 11:39:15,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:39:15,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-07-07 11:39:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991. [2020-07-07 11:39:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1991 states. [2020-07-07 11:39:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3230 transitions. [2020-07-07 11:39:15,681 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3230 transitions. Word has length 476 [2020-07-07 11:39:15,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:39:15,684 INFO L479 AbstractCegarLoop]: Abstraction has 1991 states and 3230 transitions. [2020-07-07 11:39:15,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:39:15,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3230 transitions. [2020-07-07 11:39:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-07 11:39:15,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:39:15,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:39:15,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:39:15,703 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:39:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:39:15,705 INFO L82 PathProgramCache]: Analyzing trace with hash 168046341, now seen corresponding path program 1 times [2020-07-07 11:39:15,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:39:15,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265162909] [2020-07-07 11:39:15,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:39:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:18,645 WARN L193 SmtUtils]: Spent 999.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:39:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:39:19,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265162909] [2020-07-07 11:39:19,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:39:19,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:39:19,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867434534] [2020-07-07 11:39:19,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:39:19,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:39:19,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:39:19,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:39:19,085 INFO L87 Difference]: Start difference. First operand 1991 states and 3230 transitions. Second operand 5 states. [2020-07-07 11:39:33,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:39:33,966 INFO L93 Difference]: Finished difference Result 5904 states and 9579 transitions. [2020-07-07 11:39:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:39:33,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-07-07 11:39:33,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:39:33,990 INFO L225 Difference]: With dead ends: 5904 [2020-07-07 11:39:33,991 INFO L226 Difference]: Without dead ends: 3930 [2020-07-07 11:39:33,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:39:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2020-07-07 11:39:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2020-07-07 11:39:34,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-07-07 11:39:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6348 transitions. [2020-07-07 11:39:34,170 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6348 transitions. Word has length 476 [2020-07-07 11:39:34,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:39:34,171 INFO L479 AbstractCegarLoop]: Abstraction has 3928 states and 6348 transitions. [2020-07-07 11:39:34,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:39:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6348 transitions. [2020-07-07 11:39:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-07 11:39:34,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:39:34,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:39:34,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:39:34,191 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:39:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:39:34,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1082038238, now seen corresponding path program 1 times [2020-07-07 11:39:34,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:39:34,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277782543] [2020-07-07 11:39:34,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:39:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:35,507 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:39:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:39:35,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277782543] [2020-07-07 11:39:35,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:39:35,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:39:35,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217372356] [2020-07-07 11:39:35,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:39:35,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:39:35,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:39:35,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:35,824 INFO L87 Difference]: Start difference. First operand 3928 states and 6348 transitions. Second operand 4 states. [2020-07-07 11:39:51,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:39:51,607 INFO L93 Difference]: Finished difference Result 11482 states and 18513 transitions. [2020-07-07 11:39:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:39:51,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-07-07 11:39:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:39:51,649 INFO L225 Difference]: With dead ends: 11482 [2020-07-07 11:39:51,649 INFO L226 Difference]: Without dead ends: 7768 [2020-07-07 11:39:51,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:51,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2020-07-07 11:39:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7766. [2020-07-07 11:39:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7766 states. [2020-07-07 11:39:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 12509 transitions. [2020-07-07 11:39:51,962 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 12509 transitions. Word has length 478 [2020-07-07 11:39:51,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:39:51,963 INFO L479 AbstractCegarLoop]: Abstraction has 7766 states and 12509 transitions. [2020-07-07 11:39:51,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:39:51,964 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 12509 transitions. [2020-07-07 11:39:51,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-07 11:39:51,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:39:51,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:39:51,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:39:51,998 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:39:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:39:51,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2101540850, now seen corresponding path program 1 times [2020-07-07 11:39:51,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:39:52,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086866768] [2020-07-07 11:39:52,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:39:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:52,972 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:39:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:39:53,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086866768] [2020-07-07 11:39:53,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:39:53,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:39:53,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955415107] [2020-07-07 11:39:53,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:39:53,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:39:53,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:39:53,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:53,133 INFO L87 Difference]: Start difference. First operand 7766 states and 12509 transitions. Second operand 4 states. [2020-07-07 11:40:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:40:09,710 INFO L93 Difference]: Finished difference Result 23201 states and 37359 transitions. [2020-07-07 11:40:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:40:09,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-07 11:40:09,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:40:09,774 INFO L225 Difference]: With dead ends: 23201 [2020-07-07 11:40:09,774 INFO L226 Difference]: Without dead ends: 15487 [2020-07-07 11:40:09,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:09,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15487 states. [2020-07-07 11:40:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15487 to 7813. [2020-07-07 11:40:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7813 states. [2020-07-07 11:40:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7813 states to 7813 states and 12583 transitions. [2020-07-07 11:40:10,170 INFO L78 Accepts]: Start accepts. Automaton has 7813 states and 12583 transitions. Word has length 479 [2020-07-07 11:40:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:40:10,170 INFO L479 AbstractCegarLoop]: Abstraction has 7813 states and 12583 transitions. [2020-07-07 11:40:10,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:40:10,172 INFO L276 IsEmpty]: Start isEmpty. Operand 7813 states and 12583 transitions. [2020-07-07 11:40:10,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-07 11:40:10,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:40:10,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:40:10,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:40:10,202 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:40:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:40:10,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1016409383, now seen corresponding path program 1 times [2020-07-07 11:40:10,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:40:10,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025152751] [2020-07-07 11:40:10,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:40:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:11,332 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:40:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:40:11,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025152751] [2020-07-07 11:40:11,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:40:11,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:40:11,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774278290] [2020-07-07 11:40:11,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:40:11,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:40:11,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:40:11,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:11,668 INFO L87 Difference]: Start difference. First operand 7813 states and 12583 transitions. Second operand 4 states. [2020-07-07 11:40:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:40:28,812 INFO L93 Difference]: Finished difference Result 22716 states and 36476 transitions. [2020-07-07 11:40:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:40:28,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-07 11:40:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:40:28,853 INFO L225 Difference]: With dead ends: 22716 [2020-07-07 11:40:28,853 INFO L226 Difference]: Without dead ends: 15302 [2020-07-07 11:40:28,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15302 states. [2020-07-07 11:40:29,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15302 to 15300. [2020-07-07 11:40:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15300 states. [2020-07-07 11:40:29,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15300 states to 15300 states and 24521 transitions. [2020-07-07 11:40:29,571 INFO L78 Accepts]: Start accepts. Automaton has 15300 states and 24521 transitions. Word has length 480 [2020-07-07 11:40:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:40:29,573 INFO L479 AbstractCegarLoop]: Abstraction has 15300 states and 24521 transitions. [2020-07-07 11:40:29,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:40:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 15300 states and 24521 transitions. [2020-07-07 11:40:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-07 11:40:29,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:40:29,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:40:29,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:40:29,611 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:40:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:40:29,611 INFO L82 PathProgramCache]: Analyzing trace with hash -342175906, now seen corresponding path program 1 times [2020-07-07 11:40:29,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:40:29,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695144307] [2020-07-07 11:40:29,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:40:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:30,525 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:40:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:40:30,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695144307] [2020-07-07 11:40:30,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:40:30,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:40:30,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754670867] [2020-07-07 11:40:30,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:40:30,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:40:30,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:40:30,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:30,885 INFO L87 Difference]: Start difference. First operand 15300 states and 24521 transitions. Second operand 4 states. [2020-07-07 11:40:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:40:49,294 INFO L93 Difference]: Finished difference Result 45644 states and 73118 transitions. [2020-07-07 11:40:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:40:49,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-07 11:40:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:40:49,371 INFO L225 Difference]: With dead ends: 45644 [2020-07-07 11:40:49,372 INFO L226 Difference]: Without dead ends: 30488 [2020-07-07 11:40:49,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30488 states. [2020-07-07 11:40:50,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30488 to 15398. [2020-07-07 11:40:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15398 states. [2020-07-07 11:40:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15398 states to 15398 states and 24672 transitions. [2020-07-07 11:40:50,128 INFO L78 Accepts]: Start accepts. Automaton has 15398 states and 24672 transitions. Word has length 480 [2020-07-07 11:40:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:40:50,128 INFO L479 AbstractCegarLoop]: Abstraction has 15398 states and 24672 transitions. [2020-07-07 11:40:50,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:40:50,128 INFO L276 IsEmpty]: Start isEmpty. Operand 15398 states and 24672 transitions. [2020-07-07 11:40:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-07 11:40:50,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:40:50,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:40:50,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:40:50,159 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:40:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:40:50,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1081253375, now seen corresponding path program 1 times [2020-07-07 11:40:50,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:40:50,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065505094] [2020-07-07 11:40:50,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:40:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:51,073 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:40:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:40:51,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065505094] [2020-07-07 11:40:51,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:40:51,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:40:51,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724551094] [2020-07-07 11:40:51,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:40:51,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:40:51,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:40:51,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:51,408 INFO L87 Difference]: Start difference. First operand 15398 states and 24672 transitions. Second operand 4 states. [2020-07-07 11:41:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:41:10,457 INFO L93 Difference]: Finished difference Result 45779 states and 73299 transitions. [2020-07-07 11:41:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:41:10,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-07-07 11:41:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:41:10,540 INFO L225 Difference]: With dead ends: 45779 [2020-07-07 11:41:10,541 INFO L226 Difference]: Without dead ends: 30605 [2020-07-07 11:41:10,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2020-07-07 11:41:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 15515. [2020-07-07 11:41:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15515 states. [2020-07-07 11:41:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15515 states to 15515 states and 24818 transitions. [2020-07-07 11:41:11,602 INFO L78 Accepts]: Start accepts. Automaton has 15515 states and 24818 transitions. Word has length 481 [2020-07-07 11:41:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:41:11,603 INFO L479 AbstractCegarLoop]: Abstraction has 15515 states and 24818 transitions. [2020-07-07 11:41:11,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:41:11,603 INFO L276 IsEmpty]: Start isEmpty. Operand 15515 states and 24818 transitions. [2020-07-07 11:41:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-07 11:41:11,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:41:11,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:41:11,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 11:41:11,633 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:41:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:41:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1552601612, now seen corresponding path program 1 times [2020-07-07 11:41:11,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:41:11,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285037618] [2020-07-07 11:41:11,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:41:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:13,042 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:41:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:41:13,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285037618] [2020-07-07 11:41:13,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:41:13,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:41:13,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984922289] [2020-07-07 11:41:13,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:41:13,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:41:13,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:41:13,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:13,508 INFO L87 Difference]: Start difference. First operand 15515 states and 24818 transitions. Second operand 4 states. [2020-07-07 11:41:33,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:41:33,738 INFO L93 Difference]: Finished difference Result 44734 states and 71393 transitions. [2020-07-07 11:41:33,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:41:33,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-07-07 11:41:33,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:41:33,788 INFO L225 Difference]: With dead ends: 44734 [2020-07-07 11:41:33,788 INFO L226 Difference]: Without dead ends: 30188 [2020-07-07 11:41:33,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30188 states. [2020-07-07 11:41:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30188 to 30186. [2020-07-07 11:41:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30186 states. [2020-07-07 11:41:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30186 states to 30186 states and 48059 transitions. [2020-07-07 11:41:34,923 INFO L78 Accepts]: Start accepts. Automaton has 30186 states and 48059 transitions. Word has length 482 [2020-07-07 11:41:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:41:34,924 INFO L479 AbstractCegarLoop]: Abstraction has 30186 states and 48059 transitions. [2020-07-07 11:41:34,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:41:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 30186 states and 48059 transitions. [2020-07-07 11:41:34,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-07 11:41:34,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:41:34,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:41:34,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:41:34,959 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:41:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:41:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1955104209, now seen corresponding path program 1 times [2020-07-07 11:41:34,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:41:34,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735411938] [2020-07-07 11:41:34,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:41:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:37,147 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:41:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:41:37,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735411938] [2020-07-07 11:41:37,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:41:37,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:41:37,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555678224] [2020-07-07 11:41:37,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:41:37,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:41:37,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:41:37,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:41:37,327 INFO L87 Difference]: Start difference. First operand 30186 states and 48059 transitions. Second operand 5 states. [2020-07-07 11:41:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:41:54,259 INFO L93 Difference]: Finished difference Result 67902 states and 108914 transitions. [2020-07-07 11:41:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:41:54,260 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 482 [2020-07-07 11:41:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:41:54,317 INFO L225 Difference]: With dead ends: 67902 [2020-07-07 11:41:54,318 INFO L226 Difference]: Without dead ends: 34534 [2020-07-07 11:41:54,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:41:54,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34534 states. [2020-07-07 11:41:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34534 to 34532. [2020-07-07 11:41:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34532 states. [2020-07-07 11:41:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34532 states to 34532 states and 55222 transitions. [2020-07-07 11:41:57,585 INFO L78 Accepts]: Start accepts. Automaton has 34532 states and 55222 transitions. Word has length 482 [2020-07-07 11:41:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:41:57,585 INFO L479 AbstractCegarLoop]: Abstraction has 34532 states and 55222 transitions. [2020-07-07 11:41:57,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:41:57,586 INFO L276 IsEmpty]: Start isEmpty. Operand 34532 states and 55222 transitions. [2020-07-07 11:41:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-07 11:41:57,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:41:57,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:41:57,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 11:41:57,638 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:41:57,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:41:57,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1612954702, now seen corresponding path program 1 times [2020-07-07 11:41:57,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:41:57,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621948313] [2020-07-07 11:41:57,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:41:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:58,842 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:41:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:41:59,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621948313] [2020-07-07 11:41:59,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:41:59,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:41:59,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135776567] [2020-07-07 11:41:59,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:41:59,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:41:59,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:41:59,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:59,142 INFO L87 Difference]: Start difference. First operand 34532 states and 55222 transitions. Second operand 4 states. [2020-07-07 11:42:22,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:42:22,508 INFO L93 Difference]: Finished difference Result 101493 states and 162313 transitions. [2020-07-07 11:42:22,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:42:22,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-07 11:42:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:42:22,595 INFO L225 Difference]: With dead ends: 101493 [2020-07-07 11:42:22,595 INFO L226 Difference]: Without dead ends: 67981 [2020-07-07 11:42:22,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:42:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67981 states. [2020-07-07 11:42:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67981 to 67979. [2020-07-07 11:42:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67979 states. [2020-07-07 11:42:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67979 states to 67979 states and 108295 transitions. [2020-07-07 11:42:25,859 INFO L78 Accepts]: Start accepts. Automaton has 67979 states and 108295 transitions. Word has length 484 [2020-07-07 11:42:25,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:42:25,859 INFO L479 AbstractCegarLoop]: Abstraction has 67979 states and 108295 transitions. [2020-07-07 11:42:25,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:42:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 67979 states and 108295 transitions. [2020-07-07 11:42:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-07 11:42:25,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:42:25,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:42:25,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 11:42:25,953 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:42:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:42:25,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2030409168, now seen corresponding path program 1 times [2020-07-07 11:42:25,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:42:25,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539153298] [2020-07-07 11:42:25,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:42:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:42:26,901 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:42:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:42:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:42:27,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539153298] [2020-07-07 11:42:27,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:42:27,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:42:27,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200790319] [2020-07-07 11:42:27,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:42:27,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:42:27,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:42:27,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:42:27,075 INFO L87 Difference]: Start difference. First operand 67979 states and 108295 transitions. Second operand 4 states. [2020-07-07 11:42:46,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:42:46,257 INFO L93 Difference]: Finished difference Result 199189 states and 316915 transitions. [2020-07-07 11:42:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:42:46,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-07 11:42:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:42:46,451 INFO L225 Difference]: With dead ends: 199189 [2020-07-07 11:42:46,452 INFO L226 Difference]: Without dead ends: 133603 [2020-07-07 11:42:46,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:42:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133603 states. [2020-07-07 11:42:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133603 to 68369. [2020-07-07 11:42:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68369 states. [2020-07-07 11:42:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68369 states to 68369 states and 108871 transitions. [2020-07-07 11:42:50,150 INFO L78 Accepts]: Start accepts. Automaton has 68369 states and 108871 transitions. Word has length 485 [2020-07-07 11:42:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:42:50,150 INFO L479 AbstractCegarLoop]: Abstraction has 68369 states and 108871 transitions. [2020-07-07 11:42:50,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:42:50,150 INFO L276 IsEmpty]: Start isEmpty. Operand 68369 states and 108871 transitions. [2020-07-07 11:42:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-07 11:42:50,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:42:50,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:42:50,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 11:42:50,225 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:42:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:42:50,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1971007991, now seen corresponding path program 1 times [2020-07-07 11:42:50,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:42:50,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195069151] [2020-07-07 11:42:50,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:42:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:42:51,514 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:42:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:42:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:42:52,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195069151] [2020-07-07 11:42:52,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:42:52,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:42:52,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188978966] [2020-07-07 11:42:52,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:42:52,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:42:52,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:42:52,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:42:52,102 INFO L87 Difference]: Start difference. First operand 68369 states and 108871 transitions. Second operand 4 states. [2020-07-07 11:43:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:21,873 INFO L93 Difference]: Finished difference Result 200055 states and 318313 transitions. [2020-07-07 11:43:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:43:21,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-07 11:43:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:22,083 INFO L225 Difference]: With dead ends: 200055 [2020-07-07 11:43:22,083 INFO L226 Difference]: Without dead ends: 134536 [2020-07-07 11:43:22,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134536 states. [2020-07-07 11:43:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134536 to 134534. [2020-07-07 11:43:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134534 states. [2020-07-07 11:43:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134534 states to 134534 states and 213380 transitions. [2020-07-07 11:43:31,046 INFO L78 Accepts]: Start accepts. Automaton has 134534 states and 213380 transitions. Word has length 486 [2020-07-07 11:43:31,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:31,047 INFO L479 AbstractCegarLoop]: Abstraction has 134534 states and 213380 transitions. [2020-07-07 11:43:31,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:43:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 134534 states and 213380 transitions. [2020-07-07 11:43:31,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-07 11:43:31,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:31,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:31,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 11:43:31,186 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:31,186 INFO L82 PathProgramCache]: Analyzing trace with hash -917079770, now seen corresponding path program 1 times [2020-07-07 11:43:31,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:31,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688967215] [2020-07-07 11:43:31,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:33,338 WARN L193 SmtUtils]: Spent 968.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:43:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:33,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688967215] [2020-07-07 11:43:33,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:33,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:43:33,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277755135] [2020-07-07 11:43:33,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:43:33,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:33,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:43:33,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:43:33,605 INFO L87 Difference]: Start difference. First operand 134534 states and 213380 transitions. Second operand 5 states. [2020-07-07 11:44:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:02,486 INFO L93 Difference]: Finished difference Result 312717 states and 499578 transitions. [2020-07-07 11:44:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:44:02,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 486 [2020-07-07 11:44:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:02,746 INFO L225 Difference]: With dead ends: 312717 [2020-07-07 11:44:02,746 INFO L226 Difference]: Without dead ends: 159955 [2020-07-07 11:44:02,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:44:03,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159955 states. [2020-07-07 11:44:15,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159955 to 159953. [2020-07-07 11:44:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159953 states. [2020-07-07 11:44:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159953 states to 159953 states and 254900 transitions. [2020-07-07 11:44:15,726 INFO L78 Accepts]: Start accepts. Automaton has 159953 states and 254900 transitions. Word has length 486 [2020-07-07 11:44:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:15,726 INFO L479 AbstractCegarLoop]: Abstraction has 159953 states and 254900 transitions. [2020-07-07 11:44:15,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:44:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand 159953 states and 254900 transitions. [2020-07-07 11:44:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-07 11:44:15,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:15,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:44:15,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 11:44:15,904 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:15,904 INFO L82 PathProgramCache]: Analyzing trace with hash -509137109, now seen corresponding path program 1 times [2020-07-07 11:44:15,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:15,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838294020] [2020-07-07 11:44:15,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:17,127 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:44:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:44:17,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838294020] [2020-07-07 11:44:17,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:17,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:44:17,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482167456] [2020-07-07 11:44:17,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:44:17,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:44:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:44:17,304 INFO L87 Difference]: Start difference. First operand 159953 states and 254900 transitions. Second operand 4 states. [2020-07-07 11:44:18,185 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 384 [2020-07-07 11:44:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:47,471 INFO L93 Difference]: Finished difference Result 332173 states and 515718 transitions. [2020-07-07 11:44:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:44:47,473 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-07 11:44:47,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:47,873 INFO L225 Difference]: With dead ends: 332173 [2020-07-07 11:44:47,873 INFO L226 Difference]: Without dead ends: 243475 [2020-07-07 11:44:48,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:44:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243475 states. [2020-07-07 11:45:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243475 to 243473. [2020-07-07 11:45:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243473 states. [2020-07-07 11:45:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243473 states to 243473 states and 379388 transitions. [2020-07-07 11:45:08,525 INFO L78 Accepts]: Start accepts. Automaton has 243473 states and 379388 transitions. Word has length 488 [2020-07-07 11:45:08,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:08,526 INFO L479 AbstractCegarLoop]: Abstraction has 243473 states and 379388 transitions. [2020-07-07 11:45:08,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:45:08,526 INFO L276 IsEmpty]: Start isEmpty. Operand 243473 states and 379388 transitions. [2020-07-07 11:45:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-07 11:45:08,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:08,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:45:08,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 11:45:08,798 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:08,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:08,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1358520816, now seen corresponding path program 1 times [2020-07-07 11:45:08,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:08,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82236390] [2020-07-07 11:45:08,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:10,941 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:45:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:45:11,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82236390] [2020-07-07 11:45:11,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:11,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-07-07 11:45:11,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637196922] [2020-07-07 11:45:11,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:45:11,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:11,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:45:11,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:45:11,564 INFO L87 Difference]: Start difference. First operand 243473 states and 379388 transitions. Second operand 20 states. [2020-07-07 11:45:15,842 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 425 [2020-07-07 11:45:32,761 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2020-07-07 11:45:33,014 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-07-07 11:45:43,097 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-07-07 11:46:40,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:46:40,165 INFO L93 Difference]: Finished difference Result 630153 states and 993902 transitions. [2020-07-07 11:46:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-07 11:46:40,166 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 488 [2020-07-07 11:46:40,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:46:40,924 INFO L225 Difference]: With dead ends: 630153 [2020-07-07 11:46:40,924 INFO L226 Difference]: Without dead ends: 578999 [2020-07-07 11:46:41,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=585, Invalid=1865, Unknown=0, NotChecked=0, Total=2450 [2020-07-07 11:46:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578999 states. [2020-07-07 11:47:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578999 to 299825. [2020-07-07 11:47:09,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299825 states. [2020-07-07 11:47:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299825 states to 299825 states and 467996 transitions. [2020-07-07 11:47:10,218 INFO L78 Accepts]: Start accepts. Automaton has 299825 states and 467996 transitions. Word has length 488 [2020-07-07 11:47:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:10,219 INFO L479 AbstractCegarLoop]: Abstraction has 299825 states and 467996 transitions. [2020-07-07 11:47:10,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:47:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 299825 states and 467996 transitions. [2020-07-07 11:47:10,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-07 11:47:10,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:10,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:47:10,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 11:47:10,442 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:10,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:10,442 INFO L82 PathProgramCache]: Analyzing trace with hash -763957802, now seen corresponding path program 1 times [2020-07-07 11:47:10,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:10,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948717963] [2020-07-07 11:47:10,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:13,135 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:47:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:47:13,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948717963] [2020-07-07 11:47:13,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:13,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 11:47:13,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99845375] [2020-07-07 11:47:13,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:47:13,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:13,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:47:13,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:47:13,483 INFO L87 Difference]: Start difference. First operand 299825 states and 467996 transitions. Second operand 15 states. [2020-07-07 11:47:14,603 WARN L193 SmtUtils]: Spent 962.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2020-07-07 11:48:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:48:16,354 INFO L93 Difference]: Finished difference Result 539365 states and 843746 transitions. [2020-07-07 11:48:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 11:48:16,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 488 [2020-07-07 11:48:16,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:48:16,913 INFO L225 Difference]: With dead ends: 539365 [2020-07-07 11:48:16,913 INFO L226 Difference]: Without dead ends: 479971 [2020-07-07 11:48:17,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-07-07 11:48:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479971 states. [2020-07-07 11:48:46,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479971 to 278833. [2020-07-07 11:48:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278833 states. [2020-07-07 11:48:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278833 states to 278833 states and 435340 transitions. [2020-07-07 11:48:46,760 INFO L78 Accepts]: Start accepts. Automaton has 278833 states and 435340 transitions. Word has length 488 [2020-07-07 11:48:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:48:46,761 INFO L479 AbstractCegarLoop]: Abstraction has 278833 states and 435340 transitions. [2020-07-07 11:48:46,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:48:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 278833 states and 435340 transitions. [2020-07-07 11:48:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-07 11:48:46,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:48:46,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:48:46,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 11:48:46,982 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:48:46,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:48:46,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2023298158, now seen corresponding path program 1 times [2020-07-07 11:48:46,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:48:46,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254820523] [2020-07-07 11:48:46,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:48:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:49,448 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:48:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:48:49,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254820523] [2020-07-07 11:48:49,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:48:49,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-07 11:48:49,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756323165] [2020-07-07 11:48:49,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:48:49,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:48:49,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:48:49,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:48:49,940 INFO L87 Difference]: Start difference. First operand 278833 states and 435340 transitions. Second operand 16 states. [2020-07-07 11:48:51,097 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2020-07-07 11:49:56,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:49:56,663 INFO L93 Difference]: Finished difference Result 544877 states and 854184 transitions. [2020-07-07 11:49:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 11:49:56,665 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 488 [2020-07-07 11:49:56,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:49:57,324 INFO L225 Difference]: With dead ends: 544877 [2020-07-07 11:49:57,324 INFO L226 Difference]: Without dead ends: 504891 [2020-07-07 11:49:57,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 11:49:57,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504891 states. [2020-07-07 11:50:31,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504891 to 289409. [2020-07-07 11:50:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289409 states. [2020-07-07 11:50:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289409 states to 289409 states and 450396 transitions. [2020-07-07 11:50:32,200 INFO L78 Accepts]: Start accepts. Automaton has 289409 states and 450396 transitions. Word has length 488 [2020-07-07 11:50:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:50:32,200 INFO L479 AbstractCegarLoop]: Abstraction has 289409 states and 450396 transitions. [2020-07-07 11:50:32,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:50:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 289409 states and 450396 transitions. [2020-07-07 11:50:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-07 11:50:32,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:50:32,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:50:32,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 11:50:32,424 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:50:32,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:50:32,424 INFO L82 PathProgramCache]: Analyzing trace with hash 149190520, now seen corresponding path program 1 times [2020-07-07 11:50:32,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:50:32,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633296193] [2020-07-07 11:50:32,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:50:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:50:34,208 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification that was a NOOP. DAG size: 382 [2020-07-07 11:50:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:50:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:50:34,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633296193] [2020-07-07 11:50:34,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:50:34,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:50:34,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604849263] [2020-07-07 11:50:34,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:50:34,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:50:34,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:50:34,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:50:34,439 INFO L87 Difference]: Start difference. First operand 289409 states and 450396 transitions. Second operand 5 states.