/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_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:45:12,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:45:12,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:45:12,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:45:12,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:45:12,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:45:12,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:45:12,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:45:12,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:45:12,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:45:12,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:45:12,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:45:12,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:45:12,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:45:12,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:45:12,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:45:12,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:45:12,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:45:12,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:45:12,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:45:12,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:45:12,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:45:12,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:45:12,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:45:13,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:45:13,004 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:45:13,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:45:13,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:45:13,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:45:13,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:45:13,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:45:13,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:45:13,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:45:13,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:45:13,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:45:13,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:45:13,011 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 11:45:13,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:45:13,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:45:13,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:45:13,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:45:13,029 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:45:13,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:45:13,029 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:45:13,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:45:13,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:45:13,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:45:13,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:45:13,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:45:13,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:45:13,031 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:45:13,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:45:13,031 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:45:13,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:45:13,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:45:13,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:45:13,032 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:45:13,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:45:13,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:45:13,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:45:13,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:45:13,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:45:13,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:45:13,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:45:13,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:45:13,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:45:13,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:45:13,308 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:45:13,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:45:13,327 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:45:13,329 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:45:13,329 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:45:13,330 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:45:13,410 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2aaee920/bc7173dfa2704abbb343d7341f90aaf5/FLAG5819c2c76 [2020-07-07 11:45:14,059 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:45:14,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:45:14,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2aaee920/bc7173dfa2704abbb343d7341f90aaf5/FLAG5819c2c76 [2020-07-07 11:45:14,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2aaee920/bc7173dfa2704abbb343d7341f90aaf5 [2020-07-07 11:45:14,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:45:14,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:45:14,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:45:14,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:45:14,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:45:14,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:45:14" (1/1) ... [2020-07-07 11:45:14,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d5012d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:45:14, skipping insertion in model container [2020-07-07 11:45:14,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:45:14" (1/1) ... [2020-07-07 11:45:14,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:45:14,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:45:15,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:45:15,553 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:45:16,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:45:16,080 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:45:16,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:45:16 WrapperNode [2020-07-07 11:45:16,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:45:16,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:45:16,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:45:16,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:45:16,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:45:16" (1/1) ... [2020-07-07 11:45:16,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:45:16" (1/1) ... [2020-07-07 11:45:16,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:45:16" (1/1) ... [2020-07-07 11:45:16,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:45:16" (1/1) ... [2020-07-07 11:45:16,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:45:16" (1/1) ... [2020-07-07 11:45:16,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:45:16" (1/1) ... [2020-07-07 11:45:16,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:45:16" (1/1) ... [2020-07-07 11:45:16,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:45:16,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:45:16,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:45:16,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:45:16,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:45:16" (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 11:45:16,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:45:16,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:45:16,458 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:45:16,459 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:45:16,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:45:16,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 11:45:16,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-07 11:45:16,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 11:45:16,461 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-07 11:45:16,461 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:45:16,462 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:45:16,462 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-07 11:45:16,463 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-07 11:45:16,464 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-07 11:45:16,464 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-07 11:45:16,465 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-07 11:45:16,466 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-07 11:45:16,466 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-07 11:45:16,466 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-07 11:45:16,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:45:16,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:45:16,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:45:19,472 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:45:19,473 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:45:19,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:45:19 BoogieIcfgContainer [2020-07-07 11:45:19,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:45:19,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:45:19,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:45:19,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:45:19,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:45:14" (1/3) ... [2020-07-07 11:45:19,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb6d246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:45:19, skipping insertion in model container [2020-07-07 11:45:19,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:45:16" (2/3) ... [2020-07-07 11:45:19,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb6d246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:45:19, skipping insertion in model container [2020-07-07 11:45:19,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:45:19" (3/3) ... [2020-07-07 11:45:19,495 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-07 11:45:19,505 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:45:19,514 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:45:19,528 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:45:19,564 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:45:19,565 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:45:19,565 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:45:19,565 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:45:19,565 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:45:19,565 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:45:19,565 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:45:19,566 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:45:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-07-07 11:45:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-07 11:45:19,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:19,634 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] [2020-07-07 11:45:19,635 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:19,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:19,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-07-07 11:45:19,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:19,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342815631] [2020-07-07 11:45:19,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:21,391 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:45:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:21,776 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 11:45:21,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342815631] [2020-07-07 11:45:21,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:21,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:45:21,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120421292] [2020-07-07 11:45:21,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:45:21,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:21,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:45:21,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:21,818 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-07-07 11:45:22,364 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-07 11:45:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:27,550 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-07-07 11:45:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:45:27,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-07 11:45:27,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:27,603 INFO L225 Difference]: With dead ends: 1527 [2020-07-07 11:45:27,603 INFO L226 Difference]: Without dead ends: 1311 [2020-07-07 11:45:27,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:45:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-07-07 11:45:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-07-07 11:45:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-07-07 11:45:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-07-07 11:45:27,779 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-07-07 11:45:27,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:27,781 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-07-07 11:45:27,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:45:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-07-07 11:45:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-07 11:45:27,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:27,792 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] [2020-07-07 11:45:27,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:45:27,793 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:27,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-07-07 11:45:27,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:27,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766443270] [2020-07-07 11:45:27,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:28,968 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:45:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:29,243 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 11:45:29,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766443270] [2020-07-07 11:45:29,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:29,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:45:29,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652324351] [2020-07-07 11:45:29,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:45:29,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:29,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:45:29,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:29,251 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states. [2020-07-07 11:45:29,758 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-07 11:45:34,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:34,248 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-07-07 11:45:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:45:34,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-07 11:45:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:34,270 INFO L225 Difference]: With dead ends: 2683 [2020-07-07 11:45:34,270 INFO L226 Difference]: Without dead ends: 2301 [2020-07-07 11:45:34,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:45:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-07-07 11:45:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-07-07 11:45:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-07-07 11:45:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-07-07 11:45:34,400 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-07-07 11:45:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:34,403 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-07-07 11:45:34,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:45:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-07-07 11:45:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-07 11:45:34,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:34,419 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] [2020-07-07 11:45:34,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:45:34,420 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:34,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:34,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-07-07 11:45:34,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:34,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593513568] [2020-07-07 11:45:34,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:35,600 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:45:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:35,746 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 11:45:35,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593513568] [2020-07-07 11:45:35,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:35,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:45:35,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321758200] [2020-07-07 11:45:35,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:45:35,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:35,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:45:35,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:35,764 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states. [2020-07-07 11:45:36,232 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-07 11:45:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:40,215 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-07-07 11:45:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:45:40,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-07 11:45:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:40,238 INFO L225 Difference]: With dead ends: 4867 [2020-07-07 11:45:40,239 INFO L226 Difference]: Without dead ends: 4201 [2020-07-07 11:45:40,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:45:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-07-07 11:45:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-07-07 11:45:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-07-07 11:45:40,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-07-07 11:45:40,375 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-07-07 11:45:40,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:40,376 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-07-07 11:45:40,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:45:40,376 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-07-07 11:45:40,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-07 11:45:40,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:40,387 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] [2020-07-07 11:45:40,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:45:40,388 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:40,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-07-07 11:45:40,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:40,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359166843] [2020-07-07 11:45:40,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:41,439 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:45:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:41,583 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 11:45:41,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359166843] [2020-07-07 11:45:41,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:41,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:45:41,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685910199] [2020-07-07 11:45:41,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:45:41,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:41,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:45:41,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:45:41,586 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states. [2020-07-07 11:45:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:48,990 INFO L93 Difference]: Finished difference Result 12414 states and 19245 transitions. [2020-07-07 11:45:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:45:48,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-07-07 11:45:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:49,030 INFO L225 Difference]: With dead ends: 12414 [2020-07-07 11:45:49,030 INFO L226 Difference]: Without dead ends: 8230 [2020-07-07 11:45:49,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:45:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2020-07-07 11:45:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228. [2020-07-07 11:45:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8228 states. [2020-07-07 11:45:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions. [2020-07-07 11:45:49,381 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330 [2020-07-07 11:45:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:49,381 INFO L479 AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions. [2020-07-07 11:45:49,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:45:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions. [2020-07-07 11:45:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-07 11:45:49,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:49,402 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] [2020-07-07 11:45:49,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:45:49,403 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:49,404 INFO L82 PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times [2020-07-07 11:45:49,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:49,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56927789] [2020-07-07 11:45:49,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:50,133 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:45:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:50,305 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 11:45:50,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56927789] [2020-07-07 11:45:50,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:50,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:45:50,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619366311] [2020-07-07 11:45:50,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:45:50,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:50,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:45:50,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:50,307 INFO L87 Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states. [2020-07-07 11:45:58,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:58,517 INFO L93 Difference]: Finished difference Result 24233 states and 37318 transitions. [2020-07-07 11:45:58,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:45:58,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-07 11:45:58,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:58,585 INFO L225 Difference]: With dead ends: 24233 [2020-07-07 11:45:58,585 INFO L226 Difference]: Without dead ends: 16134 [2020-07-07 11:45:58,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2020-07-07 11:45:59,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132. [2020-07-07 11:45:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16132 states. [2020-07-07 11:45:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions. [2020-07-07 11:45:59,116 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332 [2020-07-07 11:45:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:59,116 INFO L479 AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions. [2020-07-07 11:45:59,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:45:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions. [2020-07-07 11:45:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-07 11:45:59,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:59,151 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] [2020-07-07 11:45:59,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:45:59,151 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:59,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:59,152 INFO L82 PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times [2020-07-07 11:45:59,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:59,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282960385] [2020-07-07 11:45:59,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:59,754 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:45:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:59,847 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 11:45:59,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282960385] [2020-07-07 11:45:59,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:59,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:45:59,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937063968] [2020-07-07 11:45:59,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:45:59,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:59,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:45:59,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:45:59,860 INFO L87 Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states. [2020-07-07 11:46:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:46:08,396 INFO L93 Difference]: Finished difference Result 48321 states and 74099 transitions. [2020-07-07 11:46:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:46:08,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-07 11:46:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:46:08,468 INFO L225 Difference]: With dead ends: 48321 [2020-07-07 11:46:08,468 INFO L226 Difference]: Without dead ends: 32231 [2020-07-07 11:46:08,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32231 states. [2020-07-07 11:46:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151. [2020-07-07 11:46:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16151 states. [2020-07-07 11:46:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions. [2020-07-07 11:46:09,226 INFO L78 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332 [2020-07-07 11:46:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:46:09,226 INFO L479 AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions. [2020-07-07 11:46:09,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:46:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions. [2020-07-07 11:46:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-07 11:46:09,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:46:09,254 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] [2020-07-07 11:46:09,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:46:09,254 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:46:09,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:46:09,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1868318850, now seen corresponding path program 1 times [2020-07-07 11:46:09,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:46:09,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93235305] [2020-07-07 11:46:09,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:46:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:09,748 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:46:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:09,979 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 11:46:09,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93235305] [2020-07-07 11:46:09,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:46:09,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:46:09,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935807111] [2020-07-07 11:46:09,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:46:09,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:46:09,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:46:09,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:09,981 INFO L87 Difference]: Start difference. First operand 16151 states and 24769 transitions. Second operand 4 states. [2020-07-07 11:46:19,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:46:19,479 INFO L93 Difference]: Finished difference Result 48340 states and 74120 transitions. [2020-07-07 11:46:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:46:19,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-07 11:46:19,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:46:19,544 INFO L225 Difference]: With dead ends: 48340 [2020-07-07 11:46:19,544 INFO L226 Difference]: Without dead ends: 32249 [2020-07-07 11:46:19,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:19,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32249 states. [2020-07-07 11:46:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32249 to 16169. [2020-07-07 11:46:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16169 states. [2020-07-07 11:46:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16169 states to 16169 states and 24790 transitions. [2020-07-07 11:46:20,259 INFO L78 Accepts]: Start accepts. Automaton has 16169 states and 24790 transitions. Word has length 333 [2020-07-07 11:46:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:46:20,260 INFO L479 AbstractCegarLoop]: Abstraction has 16169 states and 24790 transitions. [2020-07-07 11:46:20,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:46:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 16169 states and 24790 transitions. [2020-07-07 11:46:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-07 11:46:20,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:46:20,281 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] [2020-07-07 11:46:20,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 11:46:20,282 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:46:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:46:20,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1155788840, now seen corresponding path program 1 times [2020-07-07 11:46:20,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:46:20,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965109365] [2020-07-07 11:46:20,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:46:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:21,032 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:46:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:21,194 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 11:46:21,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965109365] [2020-07-07 11:46:21,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:46:21,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:46:21,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458414610] [2020-07-07 11:46:21,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:46:21,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:46:21,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:46:21,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:21,202 INFO L87 Difference]: Start difference. First operand 16169 states and 24790 transitions. Second operand 4 states. [2020-07-07 11:46:30,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:46:30,060 INFO L93 Difference]: Finished difference Result 45818 states and 70099 transitions. [2020-07-07 11:46:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:46:30,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-07 11:46:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:46:30,132 INFO L225 Difference]: With dead ends: 45818 [2020-07-07 11:46:30,132 INFO L226 Difference]: Without dead ends: 29894 [2020-07-07 11:46:30,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29894 states. [2020-07-07 11:46:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29894 to 29892. [2020-07-07 11:46:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29892 states. [2020-07-07 11:46:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29892 states to 29892 states and 45506 transitions. [2020-07-07 11:46:31,293 INFO L78 Accepts]: Start accepts. Automaton has 29892 states and 45506 transitions. Word has length 334 [2020-07-07 11:46:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:46:31,293 INFO L479 AbstractCegarLoop]: Abstraction has 29892 states and 45506 transitions. [2020-07-07 11:46:31,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:46:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 29892 states and 45506 transitions. [2020-07-07 11:46:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-07 11:46:31,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:46:31,322 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] [2020-07-07 11:46:31,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:46:31,322 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:46:31,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:46:31,322 INFO L82 PathProgramCache]: Analyzing trace with hash -942652091, now seen corresponding path program 1 times [2020-07-07 11:46:31,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:46:31,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850248629] [2020-07-07 11:46:31,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:46:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:32,290 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:46:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:32,417 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 11:46:32,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850248629] [2020-07-07 11:46:32,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:46:32,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:46:32,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201982322] [2020-07-07 11:46:32,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:46:32,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:46:32,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:46:32,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:46:32,424 INFO L87 Difference]: Start difference. First operand 29892 states and 45506 transitions. Second operand 5 states. [2020-07-07 11:46:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:46:39,247 INFO L93 Difference]: Finished difference Result 61161 states and 93093 transitions. [2020-07-07 11:46:39,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:46:39,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-07 11:46:39,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:46:39,300 INFO L225 Difference]: With dead ends: 61161 [2020-07-07 11:46:39,300 INFO L226 Difference]: Without dead ends: 30761 [2020-07-07 11:46:39,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:46:39,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30761 states. [2020-07-07 11:46:40,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30761 to 30759. [2020-07-07 11:46:40,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30759 states. [2020-07-07 11:46:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30759 states to 30759 states and 46644 transitions. [2020-07-07 11:46:40,576 INFO L78 Accepts]: Start accepts. Automaton has 30759 states and 46644 transitions. Word has length 334 [2020-07-07 11:46:40,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:46:40,576 INFO L479 AbstractCegarLoop]: Abstraction has 30759 states and 46644 transitions. [2020-07-07 11:46:40,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:46:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 30759 states and 46644 transitions. [2020-07-07 11:46:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-07 11:46:40,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:46:40,599 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] [2020-07-07 11:46:40,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 11:46:40,599 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:46:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:46:40,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1954972824, now seen corresponding path program 1 times [2020-07-07 11:46:40,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:46:40,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978733649] [2020-07-07 11:46:40,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:46:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:41,236 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:46:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:41,322 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 11:46:41,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978733649] [2020-07-07 11:46:41,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:46:41,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:46:41,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584926400] [2020-07-07 11:46:41,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:46:41,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:46:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:46:41,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:41,325 INFO L87 Difference]: Start difference. First operand 30759 states and 46644 transitions. Second operand 4 states. [2020-07-07 11:46:48,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:46:48,056 INFO L93 Difference]: Finished difference Result 91405 states and 138455 transitions. [2020-07-07 11:46:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:46:48,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-07 11:46:48,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:46:48,123 INFO L225 Difference]: With dead ends: 91405 [2020-07-07 11:46:48,123 INFO L226 Difference]: Without dead ends: 61099 [2020-07-07 11:46:48,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61099 states. [2020-07-07 11:46:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61099 to 30817. [2020-07-07 11:46:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30817 states. [2020-07-07 11:46:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30817 states to 30817 states and 46719 transitions. [2020-07-07 11:46:50,896 INFO L78 Accepts]: Start accepts. Automaton has 30817 states and 46719 transitions. Word has length 336 [2020-07-07 11:46:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:46:50,896 INFO L479 AbstractCegarLoop]: Abstraction has 30817 states and 46719 transitions. [2020-07-07 11:46:50,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:46:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 30817 states and 46719 transitions. [2020-07-07 11:46:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-07 11:46:50,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:46:50,922 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] [2020-07-07 11:46:50,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 11:46:50,923 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:46:50,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:46:50,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1525087342, now seen corresponding path program 1 times [2020-07-07 11:46:50,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:46:50,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223441348] [2020-07-07 11:46:50,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:46:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:51,631 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:46:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:51,801 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 11:46:51,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223441348] [2020-07-07 11:46:51,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:46:51,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:46:51,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938038791] [2020-07-07 11:46:51,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:46:51,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:46:51,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:46:51,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:46:51,805 INFO L87 Difference]: Start difference. First operand 30817 states and 46719 transitions. Second operand 4 states. [2020-07-07 11:47:02,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:02,195 INFO L93 Difference]: Finished difference Result 90896 states and 137566 transitions. [2020-07-07 11:47:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:47:02,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-07 11:47:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:02,257 INFO L225 Difference]: With dead ends: 90896 [2020-07-07 11:47:02,257 INFO L226 Difference]: Without dead ends: 60364 [2020-07-07 11:47:02,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:02,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60364 states. [2020-07-07 11:47:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60364 to 60362. [2020-07-07 11:47:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60362 states. [2020-07-07 11:47:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60362 states to 60362 states and 90890 transitions. [2020-07-07 11:47:04,665 INFO L78 Accepts]: Start accepts. Automaton has 60362 states and 90890 transitions. Word has length 336 [2020-07-07 11:47:04,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:04,666 INFO L479 AbstractCegarLoop]: Abstraction has 60362 states and 90890 transitions. [2020-07-07 11:47:04,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:47:04,666 INFO L276 IsEmpty]: Start isEmpty. Operand 60362 states and 90890 transitions. [2020-07-07 11:47:04,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-07 11:47:04,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:04,720 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] [2020-07-07 11:47:04,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 11:47:04,721 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:04,721 INFO L82 PathProgramCache]: Analyzing trace with hash 204469451, now seen corresponding path program 1 times [2020-07-07 11:47:04,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:04,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28511732] [2020-07-07 11:47:04,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:05,584 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:47:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:05,735 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 11:47:05,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28511732] [2020-07-07 11:47:05,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:05,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:47:05,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124201070] [2020-07-07 11:47:05,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:47:05,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:05,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:47:05,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:47:05,738 INFO L87 Difference]: Start difference. First operand 60362 states and 90890 transitions. Second operand 5 states. [2020-07-07 11:47:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:14,453 INFO L93 Difference]: Finished difference Result 124456 states and 187265 transitions. [2020-07-07 11:47:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:47:14,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-07-07 11:47:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:14,521 INFO L225 Difference]: With dead ends: 124456 [2020-07-07 11:47:14,522 INFO L226 Difference]: Without dead ends: 62896 [2020-07-07 11:47:14,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:47:14,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62896 states. [2020-07-07 11:47:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62896 to 62894. [2020-07-07 11:47:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62894 states. [2020-07-07 11:47:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62894 states to 62894 states and 94291 transitions. [2020-07-07 11:47:17,317 INFO L78 Accepts]: Start accepts. Automaton has 62894 states and 94291 transitions. Word has length 336 [2020-07-07 11:47:17,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:17,317 INFO L479 AbstractCegarLoop]: Abstraction has 62894 states and 94291 transitions. [2020-07-07 11:47:17,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:47:17,318 INFO L276 IsEmpty]: Start isEmpty. Operand 62894 states and 94291 transitions. [2020-07-07 11:47:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-07 11:47:17,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:17,364 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] [2020-07-07 11:47:17,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 11:47:17,365 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:17,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:17,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1381804601, now seen corresponding path program 1 times [2020-07-07 11:47:17,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:17,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940386275] [2020-07-07 11:47:17,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:18,672 WARN L193 SmtUtils]: Spent 967.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:47:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:18,749 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 11:47:18,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940386275] [2020-07-07 11:47:18,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:18,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:47:18,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090241907] [2020-07-07 11:47:18,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:47:18,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:18,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:47:18,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:47:18,751 INFO L87 Difference]: Start difference. First operand 62894 states and 94291 transitions. Second operand 5 states. [2020-07-07 11:47:38,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:38,212 INFO L93 Difference]: Finished difference Result 236101 states and 353136 transitions. [2020-07-07 11:47:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:47:38,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-07-07 11:47:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:38,425 INFO L225 Difference]: With dead ends: 236101 [2020-07-07 11:47:38,425 INFO L226 Difference]: Without dead ends: 175187 [2020-07-07 11:47:38,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 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 11:47:38,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175187 states. [2020-07-07 11:47:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175187 to 63421. [2020-07-07 11:47:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63421 states. [2020-07-07 11:47:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63421 states to 63421 states and 95051 transitions. [2020-07-07 11:47:43,747 INFO L78 Accepts]: Start accepts. Automaton has 63421 states and 95051 transitions. Word has length 336 [2020-07-07 11:47:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:43,747 INFO L479 AbstractCegarLoop]: Abstraction has 63421 states and 95051 transitions. [2020-07-07 11:47:43,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:47:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 63421 states and 95051 transitions. [2020-07-07 11:47:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-07 11:47:43,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:43,801 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] [2020-07-07 11:47:43,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 11:47:43,802 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:43,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:43,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1523242626, now seen corresponding path program 1 times [2020-07-07 11:47:43,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:43,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490573031] [2020-07-07 11:47:43,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:44,656 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:47:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:44,736 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 11:47:44,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490573031] [2020-07-07 11:47:44,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:44,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:47:44,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988588956] [2020-07-07 11:47:44,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:47:44,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:44,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:47:44,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:44,738 INFO L87 Difference]: Start difference. First operand 63421 states and 95051 transitions. Second operand 4 states. [2020-07-07 11:47:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:56,844 INFO L93 Difference]: Finished difference Result 154675 states and 233747 transitions. [2020-07-07 11:47:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:47:56,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-07 11:47:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:56,968 INFO L225 Difference]: With dead ends: 154675 [2020-07-07 11:47:56,968 INFO L226 Difference]: Without dead ends: 98135 [2020-07-07 11:47:57,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:47:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98135 states. [2020-07-07 11:48:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98135 to 78373. [2020-07-07 11:48:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78373 states. [2020-07-07 11:48:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78373 states to 78373 states and 119245 transitions. [2020-07-07 11:48:01,101 INFO L78 Accepts]: Start accepts. Automaton has 78373 states and 119245 transitions. Word has length 336 [2020-07-07 11:48:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:48:01,101 INFO L479 AbstractCegarLoop]: Abstraction has 78373 states and 119245 transitions. [2020-07-07 11:48:01,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:48:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 78373 states and 119245 transitions. [2020-07-07 11:48:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-07 11:48:01,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:48:01,556 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] [2020-07-07 11:48:01,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 11:48:01,556 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:48:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:48:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1011511093, now seen corresponding path program 1 times [2020-07-07 11:48:01,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:48:01,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714016686] [2020-07-07 11:48:01,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:48:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:02,180 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:48:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:02,256 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 11:48:02,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714016686] [2020-07-07 11:48:02,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:48:02,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:48:02,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940303047] [2020-07-07 11:48:02,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:48:02,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:48:02,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:48:02,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:02,259 INFO L87 Difference]: Start difference. First operand 78373 states and 119245 transitions. Second operand 4 states. [2020-07-07 11:48:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:48:15,703 INFO L93 Difference]: Finished difference Result 191231 states and 292641 transitions. [2020-07-07 11:48:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:48:15,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-07 11:48:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:48:15,885 INFO L225 Difference]: With dead ends: 191231 [2020-07-07 11:48:15,885 INFO L226 Difference]: Without dead ends: 121143 [2020-07-07 11:48:15,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121143 states. [2020-07-07 11:48:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121143 to 105117. [2020-07-07 11:48:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105117 states. [2020-07-07 11:48:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105117 states to 105117 states and 162273 transitions. [2020-07-07 11:48:23,997 INFO L78 Accepts]: Start accepts. Automaton has 105117 states and 162273 transitions. Word has length 338 [2020-07-07 11:48:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:48:23,998 INFO L479 AbstractCegarLoop]: Abstraction has 105117 states and 162273 transitions. [2020-07-07 11:48:23,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:48:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 105117 states and 162273 transitions. [2020-07-07 11:48:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-07 11:48:24,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:48:24,036 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] [2020-07-07 11:48:24,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 11:48:24,037 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:48:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:48:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1179578371, now seen corresponding path program 1 times [2020-07-07 11:48:24,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:48:24,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037902907] [2020-07-07 11:48:24,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:48:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:24,580 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:48:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:24,645 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 11:48:24,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037902907] [2020-07-07 11:48:24,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:48:24,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:48:24,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832755903] [2020-07-07 11:48:24,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:48:24,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:48:24,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:48:24,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:24,647 INFO L87 Difference]: Start difference. First operand 105117 states and 162273 transitions. Second operand 4 states. [2020-07-07 11:48:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:48:44,857 INFO L93 Difference]: Finished difference Result 309401 states and 477239 transitions. [2020-07-07 11:48:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:48:44,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-07 11:48:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:48:45,166 INFO L225 Difference]: With dead ends: 309401 [2020-07-07 11:48:45,166 INFO L226 Difference]: Without dead ends: 207007 [2020-07-07 11:48:45,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207007 states. [2020-07-07 11:48:56,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207007 to 105385. [2020-07-07 11:48:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105385 states. [2020-07-07 11:48:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105385 states to 105385 states and 162633 transitions. [2020-07-07 11:48:56,674 INFO L78 Accepts]: Start accepts. Automaton has 105385 states and 162633 transitions. Word has length 338 [2020-07-07 11:48:56,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:48:56,675 INFO L479 AbstractCegarLoop]: Abstraction has 105385 states and 162633 transitions. [2020-07-07 11:48:56,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:48:56,675 INFO L276 IsEmpty]: Start isEmpty. Operand 105385 states and 162633 transitions. [2020-07-07 11:48:56,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-07 11:48:56,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:48:56,727 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] [2020-07-07 11:48:56,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 11:48:56,728 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:48:56,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:48:56,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2004623867, now seen corresponding path program 1 times [2020-07-07 11:48:56,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:48:56,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144587845] [2020-07-07 11:48:56,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:48:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:57,256 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:48:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:57,321 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 11:48:57,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144587845] [2020-07-07 11:48:57,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:48:57,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:48:57,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032422922] [2020-07-07 11:48:57,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:48:57,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:48:57,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:48:57,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:48:57,324 INFO L87 Difference]: Start difference. First operand 105385 states and 162633 transitions. Second operand 4 states. [2020-07-07 11:49:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:49:17,690 INFO L93 Difference]: Finished difference Result 309581 states and 477371 transitions. [2020-07-07 11:49:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:49:17,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-07 11:49:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:49:17,975 INFO L225 Difference]: With dead ends: 309581 [2020-07-07 11:49:17,976 INFO L226 Difference]: Without dead ends: 207207 [2020-07-07 11:49:18,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:49:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207207 states. [2020-07-07 11:49:29,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207207 to 105617. [2020-07-07 11:49:29,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105617 states. [2020-07-07 11:49:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105617 states to 105617 states and 162859 transitions. [2020-07-07 11:49:29,495 INFO L78 Accepts]: Start accepts. Automaton has 105617 states and 162859 transitions. Word has length 339 [2020-07-07 11:49:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:49:29,495 INFO L479 AbstractCegarLoop]: Abstraction has 105617 states and 162859 transitions. [2020-07-07 11:49:29,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:49:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 105617 states and 162859 transitions. [2020-07-07 11:49:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-07 11:49:29,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:49:29,545 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] [2020-07-07 11:49:29,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 11:49:29,546 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:49:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:49:29,546 INFO L82 PathProgramCache]: Analyzing trace with hash 130285857, now seen corresponding path program 1 times [2020-07-07 11:49:29,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:49:29,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683327949] [2020-07-07 11:49:29,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:49:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:30,115 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:49:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:30,232 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 11:49:30,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683327949] [2020-07-07 11:49:30,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:49:30,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:49:30,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391532655] [2020-07-07 11:49:30,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:49:30,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:49:30,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:49:30,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:49:30,235 INFO L87 Difference]: Start difference. First operand 105617 states and 162859 transitions. Second operand 6 states. [2020-07-07 11:49:30,708 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-07 11:49:42,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:49:42,836 INFO L93 Difference]: Finished difference Result 203925 states and 314880 transitions. [2020-07-07 11:49:42,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:49:42,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 339 [2020-07-07 11:49:42,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:49:43,007 INFO L225 Difference]: With dead ends: 203925 [2020-07-07 11:49:43,007 INFO L226 Difference]: Without dead ends: 105617 [2020-07-07 11:49:43,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:49:43,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105617 states. [2020-07-07 11:49:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105617 to 105617. [2020-07-07 11:49:53,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105617 states. [2020-07-07 11:49:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105617 states to 105617 states and 161553 transitions. [2020-07-07 11:49:53,648 INFO L78 Accepts]: Start accepts. Automaton has 105617 states and 161553 transitions. Word has length 339 [2020-07-07 11:49:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:49:53,649 INFO L479 AbstractCegarLoop]: Abstraction has 105617 states and 161553 transitions. [2020-07-07 11:49:53,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:49:53,649 INFO L276 IsEmpty]: Start isEmpty. Operand 105617 states and 161553 transitions. [2020-07-07 11:49:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-07 11:49:53,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:49:53,697 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] [2020-07-07 11:49:53,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 11:49:53,697 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:49:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:49:53,698 INFO L82 PathProgramCache]: Analyzing trace with hash 450094822, now seen corresponding path program 1 times [2020-07-07 11:49:53,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:49:53,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081063505] [2020-07-07 11:49:53,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:49:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:54,489 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:49:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:54,607 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 11:49:54,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081063505] [2020-07-07 11:49:54,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:49:54,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:49:54,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750686865] [2020-07-07 11:49:54,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:49:54,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:49:54,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:49:54,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:49:54,611 INFO L87 Difference]: Start difference. First operand 105617 states and 161553 transitions. Second operand 5 states. [2020-07-07 11:50:17,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:50:17,922 INFO L93 Difference]: Finished difference Result 311079 states and 475904 transitions. [2020-07-07 11:50:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:50:17,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-07-07 11:50:17,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:50:18,219 INFO L225 Difference]: With dead ends: 311079 [2020-07-07 11:50:18,219 INFO L226 Difference]: Without dead ends: 206248 [2020-07-07 11:50:18,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:50:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206248 states. [2020-07-07 11:50:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206248 to 206246. [2020-07-07 11:50:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206246 states. [2020-07-07 11:50:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206246 states to 206246 states and 314105 transitions. [2020-07-07 11:50:38,248 INFO L78 Accepts]: Start accepts. Automaton has 206246 states and 314105 transitions. Word has length 339 [2020-07-07 11:50:38,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:50:38,249 INFO L479 AbstractCegarLoop]: Abstraction has 206246 states and 314105 transitions. [2020-07-07 11:50:38,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:50:38,249 INFO L276 IsEmpty]: Start isEmpty. Operand 206246 states and 314105 transitions. [2020-07-07 11:50:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-07 11:50:38,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:50:38,343 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] [2020-07-07 11:50:38,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 11:50:38,343 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:50:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:50:38,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1313560112, now seen corresponding path program 1 times [2020-07-07 11:50:38,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:50:38,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804080976] [2020-07-07 11:50:38,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:50:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:50:39,100 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:50:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:50:39,584 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 11:50:39,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804080976] [2020-07-07 11:50:39,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:50:39,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:50:39,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463984768] [2020-07-07 11:50:39,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:50:39,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:50:39,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:50:39,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:50:39,586 INFO L87 Difference]: Start difference. First operand 206246 states and 314105 transitions. Second operand 5 states. [2020-07-07 11:51:03,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:51:03,388 INFO L93 Difference]: Finished difference Result 298939 states and 455124 transitions. [2020-07-07 11:51:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:51:03,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 340 [2020-07-07 11:51:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:51:03,698 INFO L225 Difference]: With dead ends: 298939 [2020-07-07 11:51:03,698 INFO L226 Difference]: Without dead ends: 206248 [2020-07-07 11:51:03,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:51:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206248 states. [2020-07-07 11:51:24,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206248 to 202094. [2020-07-07 11:51:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202094 states. [2020-07-07 11:51:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202094 states to 202094 states and 308128 transitions. [2020-07-07 11:51:24,943 INFO L78 Accepts]: Start accepts. Automaton has 202094 states and 308128 transitions. Word has length 340 [2020-07-07 11:51:24,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:51:24,944 INFO L479 AbstractCegarLoop]: Abstraction has 202094 states and 308128 transitions. [2020-07-07 11:51:24,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:51:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 202094 states and 308128 transitions. [2020-07-07 11:51:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-07 11:51:25,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:51:25,022 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] [2020-07-07 11:51:25,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 11:51:25,022 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:51:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:51:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1213258003, now seen corresponding path program 1 times [2020-07-07 11:51:25,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:51:25,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216825050] [2020-07-07 11:51:25,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:51:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:51:25,528 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:51:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:51:25,598 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 11:51:25,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216825050] [2020-07-07 11:51:25,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:51:25,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:51:25,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161716785] [2020-07-07 11:51:25,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:51:25,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:51:25,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:51:25,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:51:25,600 INFO L87 Difference]: Start difference. First operand 202094 states and 308128 transitions. Second operand 4 states. [2020-07-07 11:52:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:52:08,114 INFO L93 Difference]: Finished difference Result 602388 states and 918204 transitions. [2020-07-07 11:52:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:52:08,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-07-07 11:52:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:52:08,705 INFO L225 Difference]: With dead ends: 602388 [2020-07-07 11:52:08,705 INFO L226 Difference]: Without dead ends: 401908 [2020-07-07 11:52:08,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:52:09,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401908 states. [2020-07-07 11:52:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401908 to 202438. [2020-07-07 11:52:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202438 states. [2020-07-07 11:52:32,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202438 states to 202438 states and 308496 transitions. [2020-07-07 11:52:32,925 INFO L78 Accepts]: Start accepts. Automaton has 202438 states and 308496 transitions. Word has length 343 [2020-07-07 11:52:32,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:52:32,925 INFO L479 AbstractCegarLoop]: Abstraction has 202438 states and 308496 transitions. [2020-07-07 11:52:32,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:52:32,925 INFO L276 IsEmpty]: Start isEmpty. Operand 202438 states and 308496 transitions. [2020-07-07 11:52:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-07 11:52:33,005 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:52:33,005 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] [2020-07-07 11:52:33,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 11:52:33,005 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:52:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:52:33,006 INFO L82 PathProgramCache]: Analyzing trace with hash 810066552, now seen corresponding path program 1 times [2020-07-07 11:52:33,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:52:33,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937089693] [2020-07-07 11:52:33,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:52:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:52:33,577 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:52:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:52:33,782 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 11:52:33,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937089693] [2020-07-07 11:52:33,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:52:33,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:52:33,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835778396] [2020-07-07 11:52:33,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:52:33,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:52:33,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:52:33,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:52:33,785 INFO L87 Difference]: Start difference. First operand 202438 states and 308496 transitions. Second operand 4 states. [2020-07-07 11:53:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:53:19,464 INFO L93 Difference]: Finished difference Result 591343 states and 899983 transitions. [2020-07-07 11:53:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:53:19,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-07-07 11:53:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:53:20,084 INFO L225 Difference]: With dead ends: 591343 [2020-07-07 11:53:20,085 INFO L226 Difference]: Without dead ends: 394037 [2020-07-07 11:53:20,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:53:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394037 states. [2020-07-07 11:54:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394037 to 394035. [2020-07-07 11:54:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394035 states. [2020-07-07 11:54:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394035 states to 394035 states and 596729 transitions. [2020-07-07 11:54:00,903 INFO L78 Accepts]: Start accepts. Automaton has 394035 states and 596729 transitions. Word has length 343 [2020-07-07 11:54:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:54:00,903 INFO L479 AbstractCegarLoop]: Abstraction has 394035 states and 596729 transitions. [2020-07-07 11:54:00,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:54:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 394035 states and 596729 transitions. [2020-07-07 11:54:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-07 11:54:01,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:54:01,089 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] [2020-07-07 11:54:01,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 11:54:01,089 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:54:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:54:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1897294648, now seen corresponding path program 1 times [2020-07-07 11:54:01,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:54:01,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144912840] [2020-07-07 11:54:01,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:54:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:54:01,640 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:54:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:54:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:54:01,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144912840] [2020-07-07 11:54:01,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:54:01,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:54:01,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749914526] [2020-07-07 11:54:01,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:54:01,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:54:01,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:54:01,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:54:01,744 INFO L87 Difference]: Start difference. First operand 394035 states and 596729 transitions. Second operand 4 states. [2020-07-07 11:55:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:55:25,698 INFO L93 Difference]: Finished difference Result 1140591 states and 1724853 transitions. [2020-07-07 11:55:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:55:25,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 345 [2020-07-07 11:55:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:55:26,801 INFO L225 Difference]: With dead ends: 1140591 [2020-07-07 11:55:26,801 INFO L226 Difference]: Without dead ends: 749338 [2020-07-07 11:55:27,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:55:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749338 states. [2020-07-07 11:56:51,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749338 to 749336. [2020-07-07 11:56:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749336 states. [2020-07-07 11:56:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749336 states to 749336 states and 1125229 transitions. [2020-07-07 11:56:52,798 INFO L78 Accepts]: Start accepts. Automaton has 749336 states and 1125229 transitions. Word has length 345 [2020-07-07 11:56:52,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:56:52,798 INFO L479 AbstractCegarLoop]: Abstraction has 749336 states and 1125229 transitions. [2020-07-07 11:56:52,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:56:52,798 INFO L276 IsEmpty]: Start isEmpty. Operand 749336 states and 1125229 transitions. [2020-07-07 11:56:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-07 11:56:53,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:56:53,123 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] [2020-07-07 11:56:53,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-07 11:56:53,124 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:56:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:56:53,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1956235936, now seen corresponding path program 1 times [2020-07-07 11:56:53,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:56:53,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999104561] [2020-07-07 11:56:53,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:56:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:56:53,846 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-07 11:56:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:56:53,919 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 11:56:53,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999104561] [2020-07-07 11:56:53,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:56:53,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:56:53,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941927014] [2020-07-07 11:56:53,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:56:53,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:56:53,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:56:53,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:56:53,921 INFO L87 Difference]: Start difference. First operand 749336 states and 1125229 transitions. Second operand 5 states.