/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.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:26:04,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:26:04,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:26:04,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:26:04,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:26:04,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:26:04,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:26:04,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:26:04,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:26:04,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:26:04,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:26:04,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:26:04,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:26:04,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:26:04,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:26:04,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:26:04,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:26:04,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:26:04,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:26:04,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:26:04,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:26:04,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:26:04,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:26:04,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:26:04,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:26:04,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 12:26:04,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 12:26:04,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 12:26:04,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 12:26:04,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 12:26:04,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 12:26:04,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 12:26:04,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 12:26:04,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:26:04,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:26:04,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:26:04,508 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 [2020-07-17 12:26:04,527 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:26:04,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:26:04,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:26:04,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:26:04,530 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:26:04,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:26:04,530 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:26:04,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:26:04,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:26:04,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:26:04,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:26:04,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:26:04,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:26:04,533 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:26:04,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:26:04,533 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:26:04,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:26:04,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:26:04,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:26:04,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:26:04,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:26:04,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:26:04,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:26:04,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:26:04,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:26:04,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:26:04,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:26:04,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:26:04,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:26:04,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:26:04,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:26:04,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:26:04,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:26:04,810 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:26:04,810 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:26:04,811 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-17 12:26:04,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1900c1ed9/f7faa4aa638f40649c3d14a1510c6f47/FLAG3d7a9fb79 [2020-07-17 12:26:05,518 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:26:05,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-17 12:26:05,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1900c1ed9/f7faa4aa638f40649c3d14a1510c6f47/FLAG3d7a9fb79 [2020-07-17 12:26:05,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1900c1ed9/f7faa4aa638f40649c3d14a1510c6f47 [2020-07-17 12:26:05,713 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:26:05,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:26:05,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:26:05,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:26:05,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:26:05,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:26:05" (1/1) ... [2020-07-17 12:26:05,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@724cc7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:26:05, skipping insertion in model container [2020-07-17 12:26:05,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:26:05" (1/1) ... [2020-07-17 12:26:05,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:26:05,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:26:06,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:26:06,822 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:26:07,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:26:07,350 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:26:07,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:26:07 WrapperNode [2020-07-17 12:26:07,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:26:07,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:26:07,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:26:07,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:26:07,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:26:07" (1/1) ... [2020-07-17 12:26:07,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:26:07" (1/1) ... [2020-07-17 12:26:07,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:26:07" (1/1) ... [2020-07-17 12:26:07,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:26:07" (1/1) ... [2020-07-17 12:26:07,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:26:07" (1/1) ... [2020-07-17 12:26:07,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:26:07" (1/1) ... [2020-07-17 12:26:07,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:26:07" (1/1) ... [2020-07-17 12:26:07,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:26:07,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:26:07,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:26:07,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:26:07,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:26:07" (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 [2020-07-17 12:26:07,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:26:07,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:26:07,656 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:26:07,656 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:26:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:26:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-17 12:26:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-17 12:26:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-17 12:26:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-17 12:26:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:26:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:26:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-17 12:26:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-17 12:26:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-17 12:26:07,660 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-17 12:26:07,660 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-17 12:26:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-17 12:26:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-17 12:26:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-17 12:26:07,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:26:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:26:07,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:26:10,205 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:26:10,206 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 12:26:10,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:26:10 BoogieIcfgContainer [2020-07-17 12:26:10,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:26:10,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:26:10,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:26:10,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:26:10,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:26:05" (1/3) ... [2020-07-17 12:26:10,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@941e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:26:10, skipping insertion in model container [2020-07-17 12:26:10,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:26:07" (2/3) ... [2020-07-17 12:26:10,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@941e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:26:10, skipping insertion in model container [2020-07-17 12:26:10,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:26:10" (3/3) ... [2020-07-17 12:26:10,235 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-17 12:26:10,245 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:26:10,256 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:26:10,269 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:26:10,303 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:26:10,303 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:26:10,303 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:26:10,304 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:26:10,304 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:26:10,304 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:26:10,304 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:26:10,304 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:26:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-07-17 12:26:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-17 12:26:10,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:10,388 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] [2020-07-17 12:26:10,388 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:10,396 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-07-17 12:26:10,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:10,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145794870] [2020-07-17 12:26:10,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:12,442 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:26:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:26:12,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145794870] [2020-07-17 12:26:12,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:26:12,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:26:12,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081191947] [2020-07-17 12:26:12,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:26:12,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:12,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:26:12,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:26:12,734 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-07-17 12:26:13,292 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-17 12:26:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:17,869 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-07-17 12:26:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:26:17,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-17 12:26:17,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:17,913 INFO L225 Difference]: With dead ends: 1489 [2020-07-17 12:26:17,913 INFO L226 Difference]: Without dead ends: 1273 [2020-07-17 12:26:17,921 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 [2020-07-17 12:26:17,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-07-17 12:26:18,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-07-17 12:26:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-07-17 12:26:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-07-17 12:26:18,064 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-07-17 12:26:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:18,066 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-07-17 12:26:18,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:26:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-07-17 12:26:18,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-17 12:26:18,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:18,072 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] [2020-07-17 12:26:18,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:26:18,073 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:18,073 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-07-17 12:26:18,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:18,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013901937] [2020-07-17 12:26:18,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:18,946 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:26:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:26:19,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013901937] [2020-07-17 12:26:19,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:26:19,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:26:19,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804623398] [2020-07-17 12:26:19,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:26:19,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:19,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:26:19,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:26:19,238 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2020-07-17 12:26:19,979 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-17 12:26:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:24,080 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-07-17 12:26:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:26:24,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-17 12:26:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:24,094 INFO L225 Difference]: With dead ends: 2607 [2020-07-17 12:26:24,094 INFO L226 Difference]: Without dead ends: 2225 [2020-07-17 12:26:24,098 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 [2020-07-17 12:26:24,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-07-17 12:26:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-07-17 12:26:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-07-17 12:26:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-07-17 12:26:24,189 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-07-17 12:26:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:24,190 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-07-17 12:26:24,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:26:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-07-17 12:26:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-17 12:26:24,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:24,199 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] [2020-07-17 12:26:24,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:26:24,200 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:24,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:24,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-07-17 12:26:24,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:24,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437379620] [2020-07-17 12:26:24,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:25,041 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:26:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:26:25,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437379620] [2020-07-17 12:26:25,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:26:25,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:26:25,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146498180] [2020-07-17 12:26:25,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:26:25,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:25,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:26:25,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:26:25,268 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 4 states. [2020-07-17 12:26:25,706 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-07-17 12:26:29,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:29,615 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-07-17 12:26:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:26:29,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-17 12:26:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:29,636 INFO L225 Difference]: With dead ends: 4715 [2020-07-17 12:26:29,636 INFO L226 Difference]: Without dead ends: 4049 [2020-07-17 12:26:29,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:26:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-07-17 12:26:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-07-17 12:26:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-07-17 12:26:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-07-17 12:26:29,769 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-07-17 12:26:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:29,770 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-07-17 12:26:29,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:26:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-07-17 12:26:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-17 12:26:29,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:29,781 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] [2020-07-17 12:26:29,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:26:29,781 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:29,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:29,782 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-07-17 12:26:29,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:29,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510802821] [2020-07-17 12:26:29,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:30,757 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:26:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:26:30,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510802821] [2020-07-17 12:26:30,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:26:30,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:26:30,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438862570] [2020-07-17 12:26:30,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:26:30,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:30,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:26:31,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:26:31,000 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 5 states. [2020-07-17 12:26:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:37,329 INFO L93 Difference]: Finished difference Result 11998 states and 18565 transitions. [2020-07-17 12:26:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:26:37,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2020-07-17 12:26:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:37,366 INFO L225 Difference]: With dead ends: 11998 [2020-07-17 12:26:37,366 INFO L226 Difference]: Without dead ends: 7966 [2020-07-17 12:26:37,374 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 [2020-07-17 12:26:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2020-07-17 12:26:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7964. [2020-07-17 12:26:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7964 states. [2020-07-17 12:26:37,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 12270 transitions. [2020-07-17 12:26:37,651 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 12270 transitions. Word has length 326 [2020-07-17 12:26:37,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:37,651 INFO L479 AbstractCegarLoop]: Abstraction has 7964 states and 12270 transitions. [2020-07-17 12:26:37,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:26:37,652 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 12270 transitions. [2020-07-17 12:26:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-17 12:26:37,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:37,669 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] [2020-07-17 12:26:37,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:26:37,670 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:37,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:37,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1396966584, now seen corresponding path program 1 times [2020-07-17 12:26:37,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:37,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436181150] [2020-07-17 12:26:37,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:38,355 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:26:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:26:38,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436181150] [2020-07-17 12:26:38,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:26:38,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:26:38,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481315973] [2020-07-17 12:26:38,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:26:38,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:38,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:26:38,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:26:38,503 INFO L87 Difference]: Start difference. First operand 7964 states and 12270 transitions. Second operand 4 states. [2020-07-17 12:26:45,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:45,774 INFO L93 Difference]: Finished difference Result 23441 states and 36046 transitions. [2020-07-17 12:26:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:26:45,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-17 12:26:45,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:45,836 INFO L225 Difference]: With dead ends: 23441 [2020-07-17 12:26:45,836 INFO L226 Difference]: Without dead ends: 15606 [2020-07-17 12:26:45,855 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 [2020-07-17 12:26:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2020-07-17 12:26:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15604. [2020-07-17 12:26:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15604 states. [2020-07-17 12:26:46,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15604 states to 15604 states and 23893 transitions. [2020-07-17 12:26:46,602 INFO L78 Accepts]: Start accepts. Automaton has 15604 states and 23893 transitions. Word has length 328 [2020-07-17 12:26:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:46,603 INFO L479 AbstractCegarLoop]: Abstraction has 15604 states and 23893 transitions. [2020-07-17 12:26:46,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:26:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 15604 states and 23893 transitions. [2020-07-17 12:26:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-17 12:26:46,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:46,645 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] [2020-07-17 12:26:46,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 12:26:46,645 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:46,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:46,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1164802445, now seen corresponding path program 1 times [2020-07-17 12:26:46,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:46,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503158821] [2020-07-17 12:26:46,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,149 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:26:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:26:47,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503158821] [2020-07-17 12:26:47,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:26:47,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:26:47,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331811549] [2020-07-17 12:26:47,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:26:47,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:47,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:26:47,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:26:47,249 INFO L87 Difference]: Start difference. First operand 15604 states and 23893 transitions. Second operand 4 states. [2020-07-17 12:26:55,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:26:55,469 INFO L93 Difference]: Finished difference Result 46737 states and 71555 transitions. [2020-07-17 12:26:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:26:55,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-17 12:26:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:26:55,536 INFO L225 Difference]: With dead ends: 46737 [2020-07-17 12:26:55,537 INFO L226 Difference]: Without dead ends: 31175 [2020-07-17 12:26:55,575 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 [2020-07-17 12:26:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2020-07-17 12:26:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 15623. [2020-07-17 12:26:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15623 states. [2020-07-17 12:26:56,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15623 states to 15623 states and 23921 transitions. [2020-07-17 12:26:56,374 INFO L78 Accepts]: Start accepts. Automaton has 15623 states and 23921 transitions. Word has length 328 [2020-07-17 12:26:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:26:56,375 INFO L479 AbstractCegarLoop]: Abstraction has 15623 states and 23921 transitions. [2020-07-17 12:26:56,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:26:56,375 INFO L276 IsEmpty]: Start isEmpty. Operand 15623 states and 23921 transitions. [2020-07-17 12:26:56,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-17 12:26:56,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:26:56,402 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] [2020-07-17 12:26:56,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 12:26:56,403 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:26:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:26:56,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1133119755, now seen corresponding path program 1 times [2020-07-17 12:26:56,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:26:56,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959511997] [2020-07-17 12:26:56,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:26:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:56,986 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:26:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:26:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:26:57,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959511997] [2020-07-17 12:26:57,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:26:57,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:26:57,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694657289] [2020-07-17 12:26:57,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:26:57,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:26:57,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:26:57,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:26:57,082 INFO L87 Difference]: Start difference. First operand 15623 states and 23921 transitions. Second operand 4 states. [2020-07-17 12:27:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:27:05,045 INFO L93 Difference]: Finished difference Result 46756 states and 71576 transitions. [2020-07-17 12:27:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:27:05,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-07-17 12:27:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:27:05,111 INFO L225 Difference]: With dead ends: 46756 [2020-07-17 12:27:05,112 INFO L226 Difference]: Without dead ends: 31193 [2020-07-17 12:27:05,148 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 [2020-07-17 12:27:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31193 states. [2020-07-17 12:27:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31193 to 15641. [2020-07-17 12:27:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15641 states. [2020-07-17 12:27:05,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15641 states to 15641 states and 23942 transitions. [2020-07-17 12:27:05,742 INFO L78 Accepts]: Start accepts. Automaton has 15641 states and 23942 transitions. Word has length 329 [2020-07-17 12:27:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:27:05,742 INFO L479 AbstractCegarLoop]: Abstraction has 15641 states and 23942 transitions. [2020-07-17 12:27:05,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:27:05,742 INFO L276 IsEmpty]: Start isEmpty. Operand 15641 states and 23942 transitions. [2020-07-17 12:27:05,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-17 12:27:05,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:27:05,771 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] [2020-07-17 12:27:05,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 12:27:05,771 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:27:05,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:27:05,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1733447043, now seen corresponding path program 1 times [2020-07-17 12:27:05,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:27:05,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153049344] [2020-07-17 12:27:05,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:27:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:06,339 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:27:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:27:06,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153049344] [2020-07-17 12:27:06,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:27:06,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:27:06,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451232552] [2020-07-17 12:27:06,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:27:06,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:27:06,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:27:06,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:27:06,479 INFO L87 Difference]: Start difference. First operand 15641 states and 23942 transitions. Second operand 4 states. [2020-07-17 12:27:14,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:27:14,330 INFO L93 Difference]: Finished difference Result 44290 states and 67647 transitions. [2020-07-17 12:27:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:27:14,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-17 12:27:14,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:27:14,384 INFO L225 Difference]: With dead ends: 44290 [2020-07-17 12:27:14,385 INFO L226 Difference]: Without dead ends: 28894 [2020-07-17 12:27:14,416 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 [2020-07-17 12:27:14,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28894 states. [2020-07-17 12:27:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28894 to 28892. [2020-07-17 12:27:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28892 states. [2020-07-17 12:27:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28892 states to 28892 states and 43902 transitions. [2020-07-17 12:27:15,541 INFO L78 Accepts]: Start accepts. Automaton has 28892 states and 43902 transitions. Word has length 330 [2020-07-17 12:27:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:27:15,542 INFO L479 AbstractCegarLoop]: Abstraction has 28892 states and 43902 transitions. [2020-07-17 12:27:15,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:27:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 28892 states and 43902 transitions. [2020-07-17 12:27:15,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-17 12:27:15,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:27:15,591 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] [2020-07-17 12:27:15,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 12:27:15,592 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:27:15,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:27:15,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2142783200, now seen corresponding path program 1 times [2020-07-17 12:27:15,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:27:15,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608281969] [2020-07-17 12:27:15,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:27:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:16,383 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:27:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:27:16,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608281969] [2020-07-17 12:27:16,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:27:16,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:27:16,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113498278] [2020-07-17 12:27:16,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:27:16,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:27:16,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:27:16,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:27:16,470 INFO L87 Difference]: Start difference. First operand 28892 states and 43902 transitions. Second operand 5 states. [2020-07-17 12:27:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:27:22,603 INFO L93 Difference]: Finished difference Result 59161 states and 89885 transitions. [2020-07-17 12:27:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:27:22,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-07-17 12:27:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:27:22,641 INFO L225 Difference]: With dead ends: 59161 [2020-07-17 12:27:22,642 INFO L226 Difference]: Without dead ends: 29761 [2020-07-17 12:27:22,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:27:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29761 states. [2020-07-17 12:27:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29761 to 29759. [2020-07-17 12:27:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29759 states. [2020-07-17 12:27:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29759 states to 29759 states and 45040 transitions. [2020-07-17 12:27:23,980 INFO L78 Accepts]: Start accepts. Automaton has 29759 states and 45040 transitions. Word has length 330 [2020-07-17 12:27:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:27:23,981 INFO L479 AbstractCegarLoop]: Abstraction has 29759 states and 45040 transitions. [2020-07-17 12:27:23,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:27:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 29759 states and 45040 transitions. [2020-07-17 12:27:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-17 12:27:23,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:27:23,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:27:23,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 12:27:23,998 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:27:23,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:27:23,999 INFO L82 PathProgramCache]: Analyzing trace with hash 82673009, now seen corresponding path program 1 times [2020-07-17 12:27:23,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:27:23,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750156949] [2020-07-17 12:27:23,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:27:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:24,545 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:27:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:27:24,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750156949] [2020-07-17 12:27:24,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:27:24,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:27:24,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463036902] [2020-07-17 12:27:24,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:27:24,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:27:24,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:27:24,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:27:24,626 INFO L87 Difference]: Start difference. First operand 29759 states and 45040 transitions. Second operand 4 states. [2020-07-17 12:27:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:27:31,340 INFO L93 Difference]: Finished difference Result 70125 states and 107206 transitions. [2020-07-17 12:27:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:27:31,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-17 12:27:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:27:31,395 INFO L225 Difference]: With dead ends: 70125 [2020-07-17 12:27:31,395 INFO L226 Difference]: Without dead ends: 42593 [2020-07-17 12:27:31,433 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 [2020-07-17 12:27:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42593 states. [2020-07-17 12:27:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42593 to 37231. [2020-07-17 12:27:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37231 states. [2020-07-17 12:27:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37231 states to 37231 states and 57292 transitions. [2020-07-17 12:27:32,754 INFO L78 Accepts]: Start accepts. Automaton has 37231 states and 57292 transitions. Word has length 331 [2020-07-17 12:27:32,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:27:32,755 INFO L479 AbstractCegarLoop]: Abstraction has 37231 states and 57292 transitions. [2020-07-17 12:27:32,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:27:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 37231 states and 57292 transitions. [2020-07-17 12:27:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-17 12:27:32,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:27:32,777 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] [2020-07-17 12:27:32,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 12:27:32,777 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:27:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:27:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash 942168383, now seen corresponding path program 1 times [2020-07-17 12:27:32,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:27:32,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555538085] [2020-07-17 12:27:32,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:27:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:33,277 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:27:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:27:33,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555538085] [2020-07-17 12:27:33,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:27:33,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:27:33,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513306286] [2020-07-17 12:27:33,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:27:33,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:27:33,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:27:33,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:27:33,380 INFO L87 Difference]: Start difference. First operand 37231 states and 57292 transitions. Second operand 4 states. [2020-07-17 12:27:40,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:27:40,141 INFO L93 Difference]: Finished difference Result 110821 states and 170399 transitions. [2020-07-17 12:27:40,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:27:40,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-17 12:27:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:27:40,213 INFO L225 Difference]: With dead ends: 110821 [2020-07-17 12:27:40,214 INFO L226 Difference]: Without dead ends: 74043 [2020-07-17 12:27:40,246 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 [2020-07-17 12:27:40,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74043 states. [2020-07-17 12:27:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74043 to 37289. [2020-07-17 12:27:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37289 states. [2020-07-17 12:27:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37289 states to 37289 states and 57367 transitions. [2020-07-17 12:27:42,235 INFO L78 Accepts]: Start accepts. Automaton has 37289 states and 57367 transitions. Word has length 332 [2020-07-17 12:27:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:27:42,236 INFO L479 AbstractCegarLoop]: Abstraction has 37289 states and 57367 transitions. [2020-07-17 12:27:42,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:27:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 37289 states and 57367 transitions. [2020-07-17 12:27:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-17 12:27:42,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:27:42,259 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] [2020-07-17 12:27:42,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 12:27:42,259 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:27:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:27:42,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1231527171, now seen corresponding path program 1 times [2020-07-17 12:27:42,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:27:42,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396133122] [2020-07-17 12:27:42,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:27:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:42,908 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:27:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:27:43,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396133122] [2020-07-17 12:27:43,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:27:43,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:27:43,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007003022] [2020-07-17 12:27:43,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:27:43,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:27:43,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:27:43,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:27:43,109 INFO L87 Difference]: Start difference. First operand 37289 states and 57367 transitions. Second operand 4 states. [2020-07-17 12:27:53,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:27:53,488 INFO L93 Difference]: Finished difference Result 109952 states and 168910 transitions. [2020-07-17 12:27:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:27:53,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-17 12:27:53,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:27:53,563 INFO L225 Difference]: With dead ends: 109952 [2020-07-17 12:27:53,563 INFO L226 Difference]: Without dead ends: 72948 [2020-07-17 12:27:53,596 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 [2020-07-17 12:27:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72948 states. [2020-07-17 12:27:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72948 to 72946. [2020-07-17 12:27:58,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72946 states. [2020-07-17 12:27:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72946 states to 72946 states and 111466 transitions. [2020-07-17 12:27:58,952 INFO L78 Accepts]: Start accepts. Automaton has 72946 states and 111466 transitions. Word has length 332 [2020-07-17 12:27:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:27:58,953 INFO L479 AbstractCegarLoop]: Abstraction has 72946 states and 111466 transitions. [2020-07-17 12:27:58,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:27:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 72946 states and 111466 transitions. [2020-07-17 12:27:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-17 12:27:58,984 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:27:58,984 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] [2020-07-17 12:27:58,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 12:27:58,984 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:27:58,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:27:58,985 INFO L82 PathProgramCache]: Analyzing trace with hash 574493146, now seen corresponding path program 1 times [2020-07-17 12:27:58,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:27:58,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992803582] [2020-07-17 12:27:58,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:27:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:59,825 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:27:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:27:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:27:59,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992803582] [2020-07-17 12:27:59,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:27:59,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:27:59,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747658214] [2020-07-17 12:27:59,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:27:59,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:27:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:27:59,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:27:59,936 INFO L87 Difference]: Start difference. First operand 72946 states and 111466 transitions. Second operand 5 states. [2020-07-17 12:28:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:28:08,752 INFO L93 Difference]: Finished difference Result 149624 states and 228357 transitions. [2020-07-17 12:28:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:28:08,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2020-07-17 12:28:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:28:08,861 INFO L225 Difference]: With dead ends: 149624 [2020-07-17 12:28:08,862 INFO L226 Difference]: Without dead ends: 75480 [2020-07-17 12:28:08,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:28:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75480 states. [2020-07-17 12:28:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75480 to 75478. [2020-07-17 12:28:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75478 states. [2020-07-17 12:28:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75478 states to 75478 states and 114725 transitions. [2020-07-17 12:28:14,188 INFO L78 Accepts]: Start accepts. Automaton has 75478 states and 114725 transitions. Word has length 332 [2020-07-17 12:28:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:28:14,188 INFO L479 AbstractCegarLoop]: Abstraction has 75478 states and 114725 transitions. [2020-07-17 12:28:14,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:28:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 75478 states and 114725 transitions. [2020-07-17 12:28:14,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-17 12:28:14,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:28:14,219 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] [2020-07-17 12:28:14,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 12:28:14,220 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:28:14,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:28:14,220 INFO L82 PathProgramCache]: Analyzing trace with hash -234242260, now seen corresponding path program 1 times [2020-07-17 12:28:14,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:28:14,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980366538] [2020-07-17 12:28:14,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:28:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:15,096 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:28:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:28:15,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980366538] [2020-07-17 12:28:15,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:28:15,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:28:15,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913049124] [2020-07-17 12:28:15,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:28:15,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:28:15,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:28:15,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:28:15,207 INFO L87 Difference]: Start difference. First operand 75478 states and 114725 transitions. Second operand 5 states. [2020-07-17 12:28:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:28:36,161 INFO L93 Difference]: Finished difference Result 284853 states and 432320 transitions. [2020-07-17 12:28:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:28:36,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2020-07-17 12:28:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:28:36,391 INFO L225 Difference]: With dead ends: 284853 [2020-07-17 12:28:36,391 INFO L226 Difference]: Without dead ends: 211355 [2020-07-17 12:28:36,458 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 [2020-07-17 12:28:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211355 states. [2020-07-17 12:28:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211355 to 76005. [2020-07-17 12:28:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76005 states. [2020-07-17 12:28:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76005 states to 76005 states and 115485 transitions. [2020-07-17 12:28:41,118 INFO L78 Accepts]: Start accepts. Automaton has 76005 states and 115485 transitions. Word has length 332 [2020-07-17 12:28:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:28:41,118 INFO L479 AbstractCegarLoop]: Abstraction has 76005 states and 115485 transitions. [2020-07-17 12:28:41,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:28:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 76005 states and 115485 transitions. [2020-07-17 12:28:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-17 12:28:41,487 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:28:41,488 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] [2020-07-17 12:28:41,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 12:28:41,488 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:28:41,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:28:41,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1874773864, now seen corresponding path program 1 times [2020-07-17 12:28:41,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:28:41,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21677208] [2020-07-17 12:28:41,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:28:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:42,109 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:28:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:28:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:28:42,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21677208] [2020-07-17 12:28:42,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:28:42,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:28:42,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970180152] [2020-07-17 12:28:42,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:28:42,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:28:42,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:28:42,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:28:42,278 INFO L87 Difference]: Start difference. First operand 76005 states and 115485 transitions. Second operand 4 states. [2020-07-17 12:28:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:28:54,724 INFO L93 Difference]: Finished difference Result 186495 states and 285121 transitions. [2020-07-17 12:28:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:28:54,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-17 12:28:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:28:54,853 INFO L225 Difference]: With dead ends: 186495 [2020-07-17 12:28:54,854 INFO L226 Difference]: Without dead ends: 118775 [2020-07-17 12:28:54,905 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 [2020-07-17 12:28:54,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118775 states. [2020-07-17 12:29:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118775 to 102749. [2020-07-17 12:29:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102749 states. [2020-07-17 12:29:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102749 states to 102749 states and 158513 transitions. [2020-07-17 12:29:02,869 INFO L78 Accepts]: Start accepts. Automaton has 102749 states and 158513 transitions. Word has length 334 [2020-07-17 12:29:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:29:02,869 INFO L479 AbstractCegarLoop]: Abstraction has 102749 states and 158513 transitions. [2020-07-17 12:29:02,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:29:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 102749 states and 158513 transitions. [2020-07-17 12:29:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-17 12:29:02,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:29:02,899 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] [2020-07-17 12:29:02,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 12:29:02,900 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:29:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:29:02,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2052198596, now seen corresponding path program 1 times [2020-07-17 12:29:02,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:29:02,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469958873] [2020-07-17 12:29:02,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:29:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:29:03,510 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:29:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:29:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:29:03,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469958873] [2020-07-17 12:29:03,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:29:03,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:29:03,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375423491] [2020-07-17 12:29:03,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:29:03,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:29:03,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:29:03,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:29:03,631 INFO L87 Difference]: Start difference. First operand 102749 states and 158513 transitions. Second operand 4 states. [2020-07-17 12:29:21,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:29:21,785 INFO L93 Difference]: Finished difference Result 302297 states and 465959 transitions. [2020-07-17 12:29:21,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:29:21,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-17 12:29:21,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:29:22,038 INFO L225 Difference]: With dead ends: 302297 [2020-07-17 12:29:22,038 INFO L226 Difference]: Without dead ends: 202271 [2020-07-17 12:29:22,113 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 [2020-07-17 12:29:22,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202271 states. [2020-07-17 12:29:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202271 to 103017. [2020-07-17 12:29:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103017 states. [2020-07-17 12:29:32,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103017 states to 103017 states and 158873 transitions. [2020-07-17 12:29:32,810 INFO L78 Accepts]: Start accepts. Automaton has 103017 states and 158873 transitions. Word has length 334 [2020-07-17 12:29:32,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:29:32,810 INFO L479 AbstractCegarLoop]: Abstraction has 103017 states and 158873 transitions. [2020-07-17 12:29:32,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:29:32,811 INFO L276 IsEmpty]: Start isEmpty. Operand 103017 states and 158873 transitions. [2020-07-17 12:29:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-17 12:29:32,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:29:32,844 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] [2020-07-17 12:29:32,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 12:29:32,844 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:29:32,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:29:32,845 INFO L82 PathProgramCache]: Analyzing trace with hash 924020310, now seen corresponding path program 1 times [2020-07-17 12:29:32,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:29:32,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652630599] [2020-07-17 12:29:32,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:29:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:29:33,388 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:29:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:29:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:29:33,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652630599] [2020-07-17 12:29:33,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:29:33,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:29:33,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045484834] [2020-07-17 12:29:33,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:29:33,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:29:33,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:29:33,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:29:33,503 INFO L87 Difference]: Start difference. First operand 103017 states and 158873 transitions. Second operand 6 states. [2020-07-17 12:29:33,966 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-07-17 12:29:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:29:44,730 INFO L93 Difference]: Finished difference Result 198957 states and 307134 transitions. [2020-07-17 12:29:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:29:44,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-07-17 12:29:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:29:44,841 INFO L225 Difference]: With dead ends: 198957 [2020-07-17 12:29:44,842 INFO L226 Difference]: Without dead ends: 103017 [2020-07-17 12:29:44,912 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 [2020-07-17 12:29:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103017 states. [2020-07-17 12:29:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103017 to 103017. [2020-07-17 12:29:53,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103017 states. [2020-07-17 12:29:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103017 states to 103017 states and 157871 transitions. [2020-07-17 12:29:54,028 INFO L78 Accepts]: Start accepts. Automaton has 103017 states and 157871 transitions. Word has length 334 [2020-07-17 12:29:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:29:54,029 INFO L479 AbstractCegarLoop]: Abstraction has 103017 states and 157871 transitions. [2020-07-17 12:29:54,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:29:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 103017 states and 157871 transitions. [2020-07-17 12:29:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-17 12:29:54,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:29:54,061 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] [2020-07-17 12:29:54,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 12:29:54,061 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:29:54,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:29:54,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2073937905, now seen corresponding path program 1 times [2020-07-17 12:29:54,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:29:54,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487244715] [2020-07-17 12:29:54,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:29:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:29:55,006 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:29:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:29:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:29:55,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487244715] [2020-07-17 12:29:55,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:29:55,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:29:55,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855407795] [2020-07-17 12:29:55,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:29:55,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:29:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:29:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:29:55,155 INFO L87 Difference]: Start difference. First operand 103017 states and 157871 transitions. Second operand 5 states. [2020-07-17 12:30:15,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:30:15,761 INFO L93 Difference]: Finished difference Result 304088 states and 465970 transitions. [2020-07-17 12:30:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:30:15,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-17 12:30:15,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:30:16,030 INFO L225 Difference]: With dead ends: 304088 [2020-07-17 12:30:16,031 INFO L226 Difference]: Without dead ends: 201844 [2020-07-17 12:30:16,113 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 [2020-07-17 12:30:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201844 states. [2020-07-17 12:30:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201844 to 201842. [2020-07-17 12:30:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201842 states. [2020-07-17 12:30:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201842 states to 201842 states and 308017 transitions. [2020-07-17 12:30:34,090 INFO L78 Accepts]: Start accepts. Automaton has 201842 states and 308017 transitions. Word has length 334 [2020-07-17 12:30:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:30:34,091 INFO L479 AbstractCegarLoop]: Abstraction has 201842 states and 308017 transitions. [2020-07-17 12:30:34,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:30:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 201842 states and 308017 transitions. [2020-07-17 12:30:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-17 12:30:34,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:30:34,161 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] [2020-07-17 12:30:34,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 12:30:34,162 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:30:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:30:34,162 INFO L82 PathProgramCache]: Analyzing trace with hash -860846706, now seen corresponding path program 1 times [2020-07-17 12:30:34,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:30:34,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873249610] [2020-07-17 12:30:34,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:30:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:30:34,679 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:30:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:30:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:30:34,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873249610] [2020-07-17 12:30:34,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:30:34,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:30:34,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667343969] [2020-07-17 12:30:34,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:30:34,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:30:34,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:30:34,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:30:34,745 INFO L87 Difference]: Start difference. First operand 201842 states and 308017 transitions. Second operand 4 states. [2020-07-17 12:31:12,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:31:12,277 INFO L93 Difference]: Finished difference Result 594866 states and 907239 transitions. [2020-07-17 12:31:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:31:12,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-17 12:31:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:31:12,845 INFO L225 Difference]: With dead ends: 594866 [2020-07-17 12:31:12,845 INFO L226 Difference]: Without dead ends: 397812 [2020-07-17 12:31:13,017 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 [2020-07-17 12:31:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397812 states. [2020-07-17 12:31:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397812 to 202286. [2020-07-17 12:31:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202286 states. [2020-07-17 12:31:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202286 states to 202286 states and 308449 transitions. [2020-07-17 12:31:35,440 INFO L78 Accepts]: Start accepts. Automaton has 202286 states and 308449 transitions. Word has length 335 [2020-07-17 12:31:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:31:35,441 INFO L479 AbstractCegarLoop]: Abstraction has 202286 states and 308449 transitions. [2020-07-17 12:31:35,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:31:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 202286 states and 308449 transitions. [2020-07-17 12:31:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-17 12:31:35,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:31:35,506 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] [2020-07-17 12:31:35,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 12:31:35,506 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:31:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:31:35,506 INFO L82 PathProgramCache]: Analyzing trace with hash 162534671, now seen corresponding path program 1 times [2020-07-17 12:31:35,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:31:35,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079974850] [2020-07-17 12:31:35,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:31:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:31:36,370 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:31:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:31:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:31:36,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079974850] [2020-07-17 12:31:36,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:31:36,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:31:36,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304136508] [2020-07-17 12:31:36,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:31:36,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:31:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:31:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:31:36,439 INFO L87 Difference]: Start difference. First operand 202286 states and 308449 transitions. Second operand 5 states. [2020-07-17 12:32:02,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:32:02,831 INFO L93 Difference]: Finished difference Result 293099 states and 446788 transitions. [2020-07-17 12:32:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:32:02,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-07-17 12:32:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:32:03,061 INFO L225 Difference]: With dead ends: 293099 [2020-07-17 12:32:03,061 INFO L226 Difference]: Without dead ends: 202288 [2020-07-17 12:32:03,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:32:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202288 states. [2020-07-17 12:32:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202288 to 198134. [2020-07-17 12:32:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198134 states. [2020-07-17 12:32:19,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198134 states to 198134 states and 302472 transitions. [2020-07-17 12:32:19,168 INFO L78 Accepts]: Start accepts. Automaton has 198134 states and 302472 transitions. Word has length 336 [2020-07-17 12:32:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:32:19,168 INFO L479 AbstractCegarLoop]: Abstraction has 198134 states and 302472 transitions. [2020-07-17 12:32:19,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:32:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 198134 states and 302472 transitions. [2020-07-17 12:32:19,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-17 12:32:19,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:32:19,227 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] [2020-07-17 12:32:19,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 12:32:19,228 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:32:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:32:19,228 INFO L82 PathProgramCache]: Analyzing trace with hash 159027383, now seen corresponding path program 1 times [2020-07-17 12:32:19,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:32:19,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537319278] [2020-07-17 12:32:19,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:32:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:32:19,803 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:32:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:32:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:32:19,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537319278] [2020-07-17 12:32:19,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:32:19,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:32:19,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059840412] [2020-07-17 12:32:19,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:32:19,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:32:19,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:32:19,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:32:19,903 INFO L87 Difference]: Start difference. First operand 198134 states and 302472 transitions. Second operand 4 states. [2020-07-17 12:33:00,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:33:00,372 INFO L93 Difference]: Finished difference Result 578975 states and 882497 transitions. [2020-07-17 12:33:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:33:00,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-17 12:33:00,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:33:00,879 INFO L225 Difference]: With dead ends: 578975 [2020-07-17 12:33:00,880 INFO L226 Difference]: Without dead ends: 385629 [2020-07-17 12:33:01,028 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 [2020-07-17 12:33:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385629 states. [2020-07-17 12:33:36,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385629 to 385627. [2020-07-17 12:33:36,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385627 states. [2020-07-17 12:33:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385627 states to 385627 states and 584899 transitions. [2020-07-17 12:33:37,548 INFO L78 Accepts]: Start accepts. Automaton has 385627 states and 584899 transitions. Word has length 338 [2020-07-17 12:33:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:33:37,548 INFO L479 AbstractCegarLoop]: Abstraction has 385627 states and 584899 transitions. [2020-07-17 12:33:37,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:33:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 385627 states and 584899 transitions. [2020-07-17 12:33:37,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-17 12:33:37,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:33:37,687 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] [2020-07-17 12:33:37,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 12:33:37,687 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:33:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:33:37,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1971664460, now seen corresponding path program 1 times [2020-07-17 12:33:37,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:33:37,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014535638] [2020-07-17 12:33:37,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:33:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:33:38,211 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:33:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:33:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:33:38,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014535638] [2020-07-17 12:33:38,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:33:38,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:33:38,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296284319] [2020-07-17 12:33:38,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:33:38,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:33:38,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:33:38,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:33:38,275 INFO L87 Difference]: Start difference. First operand 385627 states and 584899 transitions. Second operand 4 states. [2020-07-17 12:34:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:34:58,003 INFO L93 Difference]: Finished difference Result 1150993 states and 1745423 transitions. [2020-07-17 12:34:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:34:58,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-17 12:34:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:34:58,999 INFO L225 Difference]: With dead ends: 1150993 [2020-07-17 12:34:58,999 INFO L226 Difference]: Without dead ends: 767510 [2020-07-17 12:34:59,276 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 [2020-07-17 12:34:59,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767510 states. [2020-07-17 12:35:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767510 to 386115. [2020-07-17 12:35:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386115 states. [2020-07-17 12:35:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386115 states to 386115 states and 585417 transitions. [2020-07-17 12:35:44,482 INFO L78 Accepts]: Start accepts. Automaton has 386115 states and 585417 transitions. Word has length 339 [2020-07-17 12:35:44,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:35:44,482 INFO L479 AbstractCegarLoop]: Abstraction has 386115 states and 585417 transitions. [2020-07-17 12:35:44,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:35:44,483 INFO L276 IsEmpty]: Start isEmpty. Operand 386115 states and 585417 transitions. [2020-07-17 12:35:44,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-17 12:35:44,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:35:44,612 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] [2020-07-17 12:35:44,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 12:35:44,612 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:35:44,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:35:44,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1127711503, now seen corresponding path program 1 times [2020-07-17 12:35:44,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:35:44,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366004677] [2020-07-17 12:35:44,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:35:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:35:45,298 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:35:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:35:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:35:46,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366004677] [2020-07-17 12:35:46,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:35:46,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:35:46,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555218865] [2020-07-17 12:35:46,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:35:46,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:35:46,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:35:46,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:35:46,138 INFO L87 Difference]: Start difference. First operand 386115 states and 585417 transitions. Second operand 5 states. [2020-07-17 12:36:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:36:33,477 INFO L93 Difference]: Finished difference Result 784450 states and 1187788 transitions. [2020-07-17 12:36:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 12:36:33,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 340 [2020-07-17 12:36:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:36:34,010 INFO L225 Difference]: With dead ends: 784450 [2020-07-17 12:36:34,011 INFO L226 Difference]: Without dead ends: 393631 [2020-07-17 12:36:34,216 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 [2020-07-17 12:36:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393631 states. [2020-07-17 12:37:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393631 to 393629. [2020-07-17 12:37:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393629 states. [2020-07-17 12:37:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393629 states to 393629 states and 593132 transitions. [2020-07-17 12:37:16,210 INFO L78 Accepts]: Start accepts. Automaton has 393629 states and 593132 transitions. Word has length 340 [2020-07-17 12:37:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:37:16,210 INFO L479 AbstractCegarLoop]: Abstraction has 393629 states and 593132 transitions. [2020-07-17 12:37:16,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:37:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 393629 states and 593132 transitions. [2020-07-17 12:37:16,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-17 12:37:16,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:37:16,338 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] [2020-07-17 12:37:16,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 12:37:16,339 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:37:16,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:37:16,339 INFO L82 PathProgramCache]: Analyzing trace with hash -542661021, now seen corresponding path program 1 times [2020-07-17 12:37:16,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:37:16,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495270304] [2020-07-17 12:37:16,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:37:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:37:16,875 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-07-17 12:37:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:37:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:37:16,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495270304] [2020-07-17 12:37:16,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:37:16,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:37:16,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799151033] [2020-07-17 12:37:16,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:37:16,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:37:16,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:37:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:37:16,974 INFO L87 Difference]: Start difference. First operand 393629 states and 593132 transitions. Second operand 4 states.