/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:38:45,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:38:45,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:38:45,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:38:45,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:38:45,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:38:45,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:38:45,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:38:45,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:38:45,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:38:45,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:38:45,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:38:45,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:38:45,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:38:45,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:38:45,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:38:45,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:38:45,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:38:45,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:38:45,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:38:45,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:38:45,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:38:45,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:38:45,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:38:45,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:38:45,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:38:45,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:38:45,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:38:45,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:38:45,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:38:45,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:38:45,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:38:45,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:38:45,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:38:45,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:38:45,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:38:45,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:38:45,629 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:38:45,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:38:45,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:38:45,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:38:45,633 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:38:45,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:38:45,634 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:38:45,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:38:45,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:38:45,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:38:45,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:38:45,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:38:45,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:38:45,637 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:38:45,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:38:45,637 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:38:45,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:38:45,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:38:45,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:38:45,638 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:38:45,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:38:45,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:38:45,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:38:45,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:38:45,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:38:45,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:38:45,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:38:45,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:38:45,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:38:45,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:38:45,986 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:38:46,006 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:38:46,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:38:46,014 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:38:46,014 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:38:46,016 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-07 11:38:46,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e723457f/123188488e0348c2b154a1df7f992eba/FLAG3d46a1a2a [2020-07-07 11:38:46,856 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:38:46,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-07 11:38:46,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e723457f/123188488e0348c2b154a1df7f992eba/FLAG3d46a1a2a [2020-07-07 11:38:46,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e723457f/123188488e0348c2b154a1df7f992eba [2020-07-07 11:38:46,961 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:38:46,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:38:46,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:38:46,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:38:46,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:38:46,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:38:46" (1/1) ... [2020-07-07 11:38:46,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e9e709a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:46, skipping insertion in model container [2020-07-07 11:38:46,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:38:46" (1/1) ... [2020-07-07 11:38:46,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:38:47,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:38:48,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:38:48,878 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:38:50,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:38:50,556 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:38:50,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:50 WrapperNode [2020-07-07 11:38:50,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:38:50,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:38:50,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:38:50,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:38:50,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:50" (1/1) ... [2020-07-07 11:38:50,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:50" (1/1) ... [2020-07-07 11:38:50,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:50" (1/1) ... [2020-07-07 11:38:50,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:50" (1/1) ... [2020-07-07 11:38:50,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:50" (1/1) ... [2020-07-07 11:38:50,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:50" (1/1) ... [2020-07-07 11:38:50,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:50" (1/1) ... [2020-07-07 11:38:50,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:38:50,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:38:50,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:38:50,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:38:50,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:38:50,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:38:50,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:38:50,910 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:38:50,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:38:50,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:38:50,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 11:38:50,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-07 11:38:50,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 11:38:50,912 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-07 11:38:50,912 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:38:50,912 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:38:50,913 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-07 11:38:50,913 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-07 11:38:50,914 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-07 11:38:50,914 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-07 11:38:50,915 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-07 11:38:50,916 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-07 11:38:50,916 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-07 11:38:50,916 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-07 11:38:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-07 11:38:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:38:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:38:50,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:38:55,697 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:38:55,697 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:38:55,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:38:55 BoogieIcfgContainer [2020-07-07 11:38:55,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:38:55,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:38:55,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:38:55,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:38:55,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:38:46" (1/3) ... [2020-07-07 11:38:55,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e237fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:38:55, skipping insertion in model container [2020-07-07 11:38:55,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:50" (2/3) ... [2020-07-07 11:38:55,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e237fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:38:55, skipping insertion in model container [2020-07-07 11:38:55,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:38:55" (3/3) ... [2020-07-07 11:38:55,723 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-07 11:38:55,736 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:38:55,747 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-07 11:38:55,764 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-07 11:38:55,798 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:38:55,798 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:38:55,798 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:38:55,799 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:38:55,799 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:38:55,799 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:38:55,799 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:38:55,799 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:38:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-07-07 11:38:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-07 11:38:55,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:38:55,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:38:55,932 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:38:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:38:55,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-07-07 11:38:55,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:38:55,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870824334] [2020-07-07 11:38:55,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:38:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:38:59,523 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:38:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:38:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:38:59,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870824334] [2020-07-07 11:38:59,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:38:59,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:38:59,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596214197] [2020-07-07 11:38:59,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:38:59,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:38:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:38:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:38:59,951 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 5 states. [2020-07-07 11:39:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:39:18,198 INFO L93 Difference]: Finished difference Result 4125 states and 7467 transitions. [2020-07-07 11:39:18,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:39:18,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 473 [2020-07-07 11:39:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:39:18,240 INFO L225 Difference]: With dead ends: 4125 [2020-07-07 11:39:18,241 INFO L226 Difference]: Without dead ends: 2741 [2020-07-07 11:39:18,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:39:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2020-07-07 11:39:18,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2688. [2020-07-07 11:39:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2688 states. [2020-07-07 11:39:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 4398 transitions. [2020-07-07 11:39:18,463 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 4398 transitions. Word has length 473 [2020-07-07 11:39:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:39:18,464 INFO L479 AbstractCegarLoop]: Abstraction has 2688 states and 4398 transitions. [2020-07-07 11:39:18,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:39:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 4398 transitions. [2020-07-07 11:39:18,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-07 11:39:18,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:39:18,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:39:18,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:39:18,481 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:39:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:39:18,482 INFO L82 PathProgramCache]: Analyzing trace with hash -369254340, now seen corresponding path program 1 times [2020-07-07 11:39:18,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:39:18,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886047288] [2020-07-07 11:39:18,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:39:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:20,648 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:39:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:39:21,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886047288] [2020-07-07 11:39:21,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:39:21,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:39:21,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590958701] [2020-07-07 11:39:21,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:39:21,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:39:21,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:39:21,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:21,048 INFO L87 Difference]: Start difference. First operand 2688 states and 4398 transitions. Second operand 4 states. [2020-07-07 11:39:40,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:39:40,901 INFO L93 Difference]: Finished difference Result 7793 states and 12713 transitions. [2020-07-07 11:39:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:39:40,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2020-07-07 11:39:40,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:39:40,933 INFO L225 Difference]: With dead ends: 7793 [2020-07-07 11:39:40,933 INFO L226 Difference]: Without dead ends: 5319 [2020-07-07 11:39:40,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2020-07-07 11:39:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5268. [2020-07-07 11:39:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2020-07-07 11:39:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8596 transitions. [2020-07-07 11:39:41,152 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8596 transitions. Word has length 475 [2020-07-07 11:39:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:39:41,154 INFO L479 AbstractCegarLoop]: Abstraction has 5268 states and 8596 transitions. [2020-07-07 11:39:41,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:39:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8596 transitions. [2020-07-07 11:39:41,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-07 11:39:41,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:39:41,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:39:41,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:39:41,179 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:39:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:39:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash -567190772, now seen corresponding path program 1 times [2020-07-07 11:39:41,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:39:41,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207189797] [2020-07-07 11:39:41,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:39:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:42,516 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:39:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:39:42,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207189797] [2020-07-07 11:39:42,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:39:42,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:39:42,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981989363] [2020-07-07 11:39:42,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:39:42,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:39:42,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:39:42,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:42,744 INFO L87 Difference]: Start difference. First operand 5268 states and 8596 transitions. Second operand 4 states. [2020-07-07 11:40:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:40:01,007 INFO L93 Difference]: Finished difference Result 15707 states and 25620 transitions. [2020-07-07 11:40:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:40:01,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-07 11:40:01,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:40:01,057 INFO L225 Difference]: With dead ends: 15707 [2020-07-07 11:40:01,057 INFO L226 Difference]: Without dead ends: 10491 [2020-07-07 11:40:01,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2020-07-07 11:40:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 5315. [2020-07-07 11:40:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5315 states. [2020-07-07 11:40:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 8670 transitions. [2020-07-07 11:40:01,337 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 8670 transitions. Word has length 476 [2020-07-07 11:40:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:40:01,337 INFO L479 AbstractCegarLoop]: Abstraction has 5315 states and 8670 transitions. [2020-07-07 11:40:01,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:40:01,338 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 8670 transitions. [2020-07-07 11:40:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-07 11:40:01,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:40:01,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:40:01,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:40:01,360 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:40:01,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:40:01,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1389649697, now seen corresponding path program 1 times [2020-07-07 11:40:01,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:40:01,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123514668] [2020-07-07 11:40:01,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:40:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:02,814 WARN L193 SmtUtils]: Spent 937.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:40:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:40:03,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123514668] [2020-07-07 11:40:03,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:40:03,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:40:03,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319707833] [2020-07-07 11:40:03,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:40:03,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:40:03,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:40:03,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:03,161 INFO L87 Difference]: Start difference. First operand 5315 states and 8670 transitions. Second operand 4 states. [2020-07-07 11:40:21,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:40:21,701 INFO L93 Difference]: Finished difference Result 15285 states and 24839 transitions. [2020-07-07 11:40:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:40:21,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-07 11:40:21,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:40:21,744 INFO L225 Difference]: With dead ends: 15285 [2020-07-07 11:40:21,744 INFO L226 Difference]: Without dead ends: 10369 [2020-07-07 11:40:21,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10369 states. [2020-07-07 11:40:22,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10369 to 10320. [2020-07-07 11:40:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10320 states. [2020-07-07 11:40:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10320 states to 10320 states and 16752 transitions. [2020-07-07 11:40:22,217 INFO L78 Accepts]: Start accepts. Automaton has 10320 states and 16752 transitions. Word has length 477 [2020-07-07 11:40:22,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:40:22,218 INFO L479 AbstractCegarLoop]: Abstraction has 10320 states and 16752 transitions. [2020-07-07 11:40:22,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:40:22,218 INFO L276 IsEmpty]: Start isEmpty. Operand 10320 states and 16752 transitions. [2020-07-07 11:40:22,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-07 11:40:22,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:40:22,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:40:22,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:40:22,250 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:40:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:40:22,251 INFO L82 PathProgramCache]: Analyzing trace with hash 464533692, now seen corresponding path program 1 times [2020-07-07 11:40:22,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:40:22,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059233718] [2020-07-07 11:40:22,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:40:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:23,419 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:40:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:40:23,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059233718] [2020-07-07 11:40:23,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:40:23,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:40:23,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059198486] [2020-07-07 11:40:23,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:40:23,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:40:23,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:40:23,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:23,578 INFO L87 Difference]: Start difference. First operand 10320 states and 16752 transitions. Second operand 4 states. [2020-07-07 11:40:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:40:42,880 INFO L93 Difference]: Finished difference Result 30704 states and 49811 transitions. [2020-07-07 11:40:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:40:42,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-07 11:40:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:40:42,936 INFO L225 Difference]: With dead ends: 30704 [2020-07-07 11:40:42,936 INFO L226 Difference]: Without dead ends: 20528 [2020-07-07 11:40:42,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:42,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20528 states. [2020-07-07 11:40:43,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20528 to 10418. [2020-07-07 11:40:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10418 states. [2020-07-07 11:40:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10418 states to 10418 states and 16903 transitions. [2020-07-07 11:40:43,471 INFO L78 Accepts]: Start accepts. Automaton has 10418 states and 16903 transitions. Word has length 477 [2020-07-07 11:40:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:40:43,471 INFO L479 AbstractCegarLoop]: Abstraction has 10418 states and 16903 transitions. [2020-07-07 11:40:43,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:40:43,472 INFO L276 IsEmpty]: Start isEmpty. Operand 10418 states and 16903 transitions. [2020-07-07 11:40:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-07 11:40:43,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:40:43,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:40:43,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:40:43,498 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:40:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:40:43,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1703695035, now seen corresponding path program 1 times [2020-07-07 11:40:43,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:40:43,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565893825] [2020-07-07 11:40:43,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:40:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:44,704 WARN L193 SmtUtils]: Spent 952.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:40:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:40:45,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565893825] [2020-07-07 11:40:45,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:40:45,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:40:45,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616475337] [2020-07-07 11:40:45,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:40:45,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:40:45,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:40:45,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:45,043 INFO L87 Difference]: Start difference. First operand 10418 states and 16903 transitions. Second operand 4 states. [2020-07-07 11:41:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:41:05,132 INFO L93 Difference]: Finished difference Result 30839 states and 49992 transitions. [2020-07-07 11:41:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:41:05,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-07-07 11:41:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:41:05,181 INFO L225 Difference]: With dead ends: 30839 [2020-07-07 11:41:05,181 INFO L226 Difference]: Without dead ends: 20645 [2020-07-07 11:41:05,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20645 states. [2020-07-07 11:41:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20645 to 10535. [2020-07-07 11:41:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10535 states. [2020-07-07 11:41:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10535 states to 10535 states and 17049 transitions. [2020-07-07 11:41:05,723 INFO L78 Accepts]: Start accepts. Automaton has 10535 states and 17049 transitions. Word has length 478 [2020-07-07 11:41:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:41:05,723 INFO L479 AbstractCegarLoop]: Abstraction has 10535 states and 17049 transitions. [2020-07-07 11:41:05,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:41:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 10535 states and 17049 transitions. [2020-07-07 11:41:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-07 11:41:05,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:41:05,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:41:05,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:41:05,747 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:41:05,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:41:05,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2050355686, now seen corresponding path program 1 times [2020-07-07 11:41:05,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:41:05,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493771305] [2020-07-07 11:41:05,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:41:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:07,346 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:41:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:41:07,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493771305] [2020-07-07 11:41:07,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:41:07,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:41:07,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977823209] [2020-07-07 11:41:07,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:41:07,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:41:07,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:41:07,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:07,690 INFO L87 Difference]: Start difference. First operand 10535 states and 17049 transitions. Second operand 4 states. [2020-07-07 11:41:27,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:41:27,820 INFO L93 Difference]: Finished difference Result 29921 states and 48292 transitions. [2020-07-07 11:41:27,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:41:27,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-07 11:41:27,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:41:27,861 INFO L225 Difference]: With dead ends: 29921 [2020-07-07 11:41:27,862 INFO L226 Difference]: Without dead ends: 20355 [2020-07-07 11:41:27,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2020-07-07 11:41:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 20308. [2020-07-07 11:41:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20308 states. [2020-07-07 11:41:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20308 states to 20308 states and 32714 transitions. [2020-07-07 11:41:28,761 INFO L78 Accepts]: Start accepts. Automaton has 20308 states and 32714 transitions. Word has length 479 [2020-07-07 11:41:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:41:28,762 INFO L479 AbstractCegarLoop]: Abstraction has 20308 states and 32714 transitions. [2020-07-07 11:41:28,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:41:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 20308 states and 32714 transitions. [2020-07-07 11:41:28,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-07 11:41:28,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:41:28,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:41:28,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 11:41:28,805 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:41:28,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:41:28,806 INFO L82 PathProgramCache]: Analyzing trace with hash 421785385, now seen corresponding path program 1 times [2020-07-07 11:41:28,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:41:28,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109628026] [2020-07-07 11:41:28,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:41:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:31,041 WARN L193 SmtUtils]: Spent 956.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:41:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:41:31,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109628026] [2020-07-07 11:41:31,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:41:31,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:41:31,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564462426] [2020-07-07 11:41:31,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:41:31,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:41:31,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:41:31,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:41:31,413 INFO L87 Difference]: Start difference. First operand 20308 states and 32714 transitions. Second operand 5 states. [2020-07-07 11:41:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:41:47,807 INFO L93 Difference]: Finished difference Result 48200 states and 78307 transitions. [2020-07-07 11:41:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:41:47,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-07-07 11:41:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:41:47,848 INFO L225 Difference]: With dead ends: 48200 [2020-07-07 11:41:47,848 INFO L226 Difference]: Without dead ends: 24710 [2020-07-07 11:41:47,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:41:47,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24710 states. [2020-07-07 11:41:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24710 to 24654. [2020-07-07 11:41:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24654 states. [2020-07-07 11:41:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24654 states to 24654 states and 39929 transitions. [2020-07-07 11:41:48,796 INFO L78 Accepts]: Start accepts. Automaton has 24654 states and 39929 transitions. Word has length 479 [2020-07-07 11:41:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:41:48,797 INFO L479 AbstractCegarLoop]: Abstraction has 24654 states and 39929 transitions. [2020-07-07 11:41:48,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:41:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 24654 states and 39929 transitions. [2020-07-07 11:41:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-07 11:41:48,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:41:48,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:41:48,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:41:48,828 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:41:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:41:48,828 INFO L82 PathProgramCache]: Analyzing trace with hash -144584500, now seen corresponding path program 1 times [2020-07-07 11:41:48,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:41:48,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238700050] [2020-07-07 11:41:48,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:41:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:50,580 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:41:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:41:50,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238700050] [2020-07-07 11:41:50,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:41:50,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:41:50,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372667024] [2020-07-07 11:41:50,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:41:50,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:41:50,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:41:50,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:50,810 INFO L87 Difference]: Start difference. First operand 24654 states and 39929 transitions. Second operand 4 states. [2020-07-07 11:42:13,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:42:13,239 INFO L93 Difference]: Finished difference Result 72114 states and 116848 transitions. [2020-07-07 11:42:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:42:13,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-07-07 11:42:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:42:13,306 INFO L225 Difference]: With dead ends: 72114 [2020-07-07 11:42:13,306 INFO L226 Difference]: Without dead ends: 48480 [2020-07-07 11:42:13,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:42:13,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48480 states. [2020-07-07 11:42:16,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48480 to 48442. [2020-07-07 11:42:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48442 states. [2020-07-07 11:42:16,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48442 states to 48442 states and 78181 transitions. [2020-07-07 11:42:16,534 INFO L78 Accepts]: Start accepts. Automaton has 48442 states and 78181 transitions. Word has length 481 [2020-07-07 11:42:16,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:42:16,535 INFO L479 AbstractCegarLoop]: Abstraction has 48442 states and 78181 transitions. [2020-07-07 11:42:16,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:42:16,535 INFO L276 IsEmpty]: Start isEmpty. Operand 48442 states and 78181 transitions. [2020-07-07 11:42:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-07 11:42:16,592 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:42:16,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:42:16,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 11:42:16,593 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:42:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:42:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1057078058, now seen corresponding path program 1 times [2020-07-07 11:42:16,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:42:16,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937500489] [2020-07-07 11:42:16,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:42:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:42:17,776 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:42:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:42:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:42:17,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937500489] [2020-07-07 11:42:17,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:42:17,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:42:17,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498338447] [2020-07-07 11:42:17,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:42:17,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:42:17,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:42:17,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:42:17,938 INFO L87 Difference]: Start difference. First operand 48442 states and 78181 transitions. Second operand 4 states. [2020-07-07 11:42:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:42:32,778 INFO L93 Difference]: Finished difference Result 140578 states and 226573 transitions. [2020-07-07 11:42:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:42:32,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-07-07 11:42:32,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:42:32,873 INFO L225 Difference]: With dead ends: 140578 [2020-07-07 11:42:32,874 INFO L226 Difference]: Without dead ends: 94529 [2020-07-07 11:42:32,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:42:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94529 states. [2020-07-07 11:42:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94529 to 48832. [2020-07-07 11:42:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48832 states. [2020-07-07 11:42:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48832 states to 48832 states and 78757 transitions. [2020-07-07 11:42:35,316 INFO L78 Accepts]: Start accepts. Automaton has 48832 states and 78757 transitions. Word has length 482 [2020-07-07 11:42:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:42:35,316 INFO L479 AbstractCegarLoop]: Abstraction has 48832 states and 78757 transitions. [2020-07-07 11:42:35,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:42:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 48832 states and 78757 transitions. [2020-07-07 11:42:35,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-07 11:42:35,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:42:35,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:42:35,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 11:42:35,381 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:42:35,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:42:35,381 INFO L82 PathProgramCache]: Analyzing trace with hash 70611185, now seen corresponding path program 1 times [2020-07-07 11:42:35,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:42:35,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640171901] [2020-07-07 11:42:35,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:42:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:42:37,089 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:42:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:42:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:42:37,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640171901] [2020-07-07 11:42:37,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:42:37,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:42:37,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167022500] [2020-07-07 11:42:37,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:42:37,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:42:37,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:42:37,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:42:37,497 INFO L87 Difference]: Start difference. First operand 48832 states and 78757 transitions. Second operand 4 states. [2020-07-07 11:43:02,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:02,626 INFO L93 Difference]: Finished difference Result 141955 states and 228801 transitions. [2020-07-07 11:43:02,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:43:02,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-07-07 11:43:02,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:02,724 INFO L225 Difference]: With dead ends: 141955 [2020-07-07 11:43:02,725 INFO L226 Difference]: Without dead ends: 95973 [2020-07-07 11:43:02,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95973 states. [2020-07-07 11:43:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95973 to 95937. [2020-07-07 11:43:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95937 states. [2020-07-07 11:43:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95937 states to 95937 states and 154156 transitions. [2020-07-07 11:43:06,904 INFO L78 Accepts]: Start accepts. Automaton has 95937 states and 154156 transitions. Word has length 483 [2020-07-07 11:43:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:06,905 INFO L479 AbstractCegarLoop]: Abstraction has 95937 states and 154156 transitions. [2020-07-07 11:43:06,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:43:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 95937 states and 154156 transitions. [2020-07-07 11:43:06,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-07 11:43:06,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:06,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:06,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 11:43:06,983 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:06,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:06,983 INFO L82 PathProgramCache]: Analyzing trace with hash 167240436, now seen corresponding path program 1 times [2020-07-07 11:43:06,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:06,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873419741] [2020-07-07 11:43:06,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:09,063 WARN L193 SmtUtils]: Spent 973.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:43:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:09,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873419741] [2020-07-07 11:43:09,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:09,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:43:09,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235915087] [2020-07-07 11:43:09,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:43:09,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:09,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:43:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:43:09,672 INFO L87 Difference]: Start difference. First operand 95937 states and 154156 transitions. Second operand 5 states. [2020-07-07 11:43:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:33,853 INFO L93 Difference]: Finished difference Result 235606 states and 381258 transitions. [2020-07-07 11:43:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:43:33,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 483 [2020-07-07 11:43:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:33,996 INFO L225 Difference]: With dead ends: 235606 [2020-07-07 11:43:33,996 INFO L226 Difference]: Without dead ends: 121441 [2020-07-07 11:43:34,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:43:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121441 states. [2020-07-07 11:43:41,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121441 to 121356. [2020-07-07 11:43:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121356 states. [2020-07-07 11:43:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121356 states to 121356 states and 195892 transitions. [2020-07-07 11:43:41,197 INFO L78 Accepts]: Start accepts. Automaton has 121356 states and 195892 transitions. Word has length 483 [2020-07-07 11:43:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:41,198 INFO L479 AbstractCegarLoop]: Abstraction has 121356 states and 195892 transitions. [2020-07-07 11:43:41,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:43:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 121356 states and 195892 transitions. [2020-07-07 11:43:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-07 11:43:41,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:41,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:43:41,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 11:43:41,330 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:41,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:41,330 INFO L82 PathProgramCache]: Analyzing trace with hash 11218692, now seen corresponding path program 1 times [2020-07-07 11:43:41,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:41,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088399372] [2020-07-07 11:43:41,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:43,325 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:43:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:43:43,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088399372] [2020-07-07 11:43:43,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:43,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:43:43,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176211060] [2020-07-07 11:43:43,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:43:43,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:43,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:43:43,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:43:43,500 INFO L87 Difference]: Start difference. First operand 121356 states and 195892 transitions. Second operand 4 states. [2020-07-07 11:43:44,522 WARN L193 SmtUtils]: Spent 973.00 ms on a formula simplification that was a NOOP. DAG size: 387 [2020-07-07 11:44:06,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:06,371 INFO L93 Difference]: Finished difference Result 221246 states and 346342 transitions. [2020-07-07 11:44:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:44:06,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-07 11:44:06,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:06,566 INFO L225 Difference]: With dead ends: 221246 [2020-07-07 11:44:06,566 INFO L226 Difference]: Without dead ends: 171145 [2020-07-07 11:44:06,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:44:06,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171145 states. [2020-07-07 11:44:14,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171145 to 170764. [2020-07-07 11:44:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170764 states. [2020-07-07 11:44:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170764 states to 170764 states and 269116 transitions. [2020-07-07 11:44:15,222 INFO L78 Accepts]: Start accepts. Automaton has 170764 states and 269116 transitions. Word has length 485 [2020-07-07 11:44:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:15,222 INFO L479 AbstractCegarLoop]: Abstraction has 170764 states and 269116 transitions. [2020-07-07 11:44:15,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:44:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 170764 states and 269116 transitions. [2020-07-07 11:44:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-07 11:44:15,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:15,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:44:15,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 11:44:15,367 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:15,367 INFO L82 PathProgramCache]: Analyzing trace with hash 784767583, now seen corresponding path program 1 times [2020-07-07 11:44:15,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:15,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84563550] [2020-07-07 11:44:15,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:20,759 WARN L193 SmtUtils]: Spent 3.79 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:44:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:44:21,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84563550] [2020-07-07 11:44:21,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:21,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-07-07 11:44:21,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874818634] [2020-07-07 11:44:21,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:44:21,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:21,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:44:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:44:21,284 INFO L87 Difference]: Start difference. First operand 170764 states and 269116 transitions. Second operand 20 states. [2020-07-07 11:44:22,630 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 418 [2020-07-07 11:44:36,472 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-07-07 11:44:41,938 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-07-07 11:45:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:20,313 INFO L93 Difference]: Finished difference Result 486411 states and 750245 transitions. [2020-07-07 11:45:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:45:20,315 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 485 [2020-07-07 11:45:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:20,827 INFO L225 Difference]: With dead ends: 486411 [2020-07-07 11:45:20,828 INFO L226 Difference]: Without dead ends: 456398 [2020-07-07 11:45:20,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=353, Invalid=1287, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 11:45:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456398 states. [2020-07-07 11:45:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456398 to 338872. [2020-07-07 11:45:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338872 states. [2020-07-07 11:45:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338872 states to 338872 states and 526640 transitions. [2020-07-07 11:45:52,283 INFO L78 Accepts]: Start accepts. Automaton has 338872 states and 526640 transitions. Word has length 485 [2020-07-07 11:45:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:45:52,283 INFO L479 AbstractCegarLoop]: Abstraction has 338872 states and 526640 transitions. [2020-07-07 11:45:52,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:45:52,284 INFO L276 IsEmpty]: Start isEmpty. Operand 338872 states and 526640 transitions. [2020-07-07 11:45:52,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-07 11:45:52,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:45:52,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:45:52,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 11:45:52,548 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:45:52,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:45:52,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1866960202, now seen corresponding path program 1 times [2020-07-07 11:45:52,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:45:52,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151896240] [2020-07-07 11:45:52,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:45:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:54,812 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:45:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:45:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:45:55,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151896240] [2020-07-07 11:45:55,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:45:55,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 11:45:55,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131076240] [2020-07-07 11:45:55,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:45:55,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:45:55,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:45:55,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:45:55,215 INFO L87 Difference]: Start difference. First operand 338872 states and 526640 transitions. Second operand 15 states. [2020-07-07 11:45:57,007 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 421 [2020-07-07 11:47:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:05,952 INFO L93 Difference]: Finished difference Result 659641 states and 1050101 transitions. [2020-07-07 11:47:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 11:47:05,954 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 485 [2020-07-07 11:47:05,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:06,750 INFO L225 Difference]: With dead ends: 659641 [2020-07-07 11:47:06,750 INFO L226 Difference]: Without dead ends: 563040 [2020-07-07 11:47:06,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2020-07-07 11:47:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563040 states. [2020-07-07 11:47:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563040 to 353524. [2020-07-07 11:47:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353524 states. [2020-07-07 11:47:42,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353524 states to 353524 states and 552340 transitions. [2020-07-07 11:47:42,485 INFO L78 Accepts]: Start accepts. Automaton has 353524 states and 552340 transitions. Word has length 485 [2020-07-07 11:47:42,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:47:42,485 INFO L479 AbstractCegarLoop]: Abstraction has 353524 states and 552340 transitions. [2020-07-07 11:47:42,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:47:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 353524 states and 552340 transitions. [2020-07-07 11:47:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-07 11:47:42,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:47:42,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:47:42,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 11:47:42,735 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:47:42,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:47:42,736 INFO L82 PathProgramCache]: Analyzing trace with hash 296961277, now seen corresponding path program 1 times [2020-07-07 11:47:42,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:47:42,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910764659] [2020-07-07 11:47:42,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:47:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:45,378 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:47:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:47:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:47:46,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910764659] [2020-07-07 11:47:46,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:47:46,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-07 11:47:46,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795648586] [2020-07-07 11:47:46,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:47:46,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:47:46,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:47:46,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:47:46,469 INFO L87 Difference]: Start difference. First operand 353524 states and 552340 transitions. Second operand 16 states. [2020-07-07 11:47:47,902 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 421 [2020-07-07 11:49:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:49:03,018 INFO L93 Difference]: Finished difference Result 590566 states and 936101 transitions. [2020-07-07 11:49:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 11:49:03,019 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 485 [2020-07-07 11:49:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:49:03,667 INFO L225 Difference]: With dead ends: 590566 [2020-07-07 11:49:03,668 INFO L226 Difference]: Without dead ends: 530625 [2020-07-07 11:49:03,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 11:49:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530625 states. [2020-07-07 11:49:43,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530625 to 363876. [2020-07-07 11:49:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363876 states. [2020-07-07 11:49:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363876 states to 363876 states and 567172 transitions. [2020-07-07 11:49:43,829 INFO L78 Accepts]: Start accepts. Automaton has 363876 states and 567172 transitions. Word has length 485 [2020-07-07 11:49:43,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:49:43,830 INFO L479 AbstractCegarLoop]: Abstraction has 363876 states and 567172 transitions. [2020-07-07 11:49:43,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:49:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 363876 states and 567172 transitions. [2020-07-07 11:49:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-07 11:49:44,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:49:44,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:49:44,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 11:49:44,124 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:49:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:49:44,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1379153896, now seen corresponding path program 1 times [2020-07-07 11:49:44,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:49:44,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110098980] [2020-07-07 11:49:44,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:49:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:45,831 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-07 11:49:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:49:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:49:46,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110098980] [2020-07-07 11:49:46,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:49:46,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:49:46,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567446921] [2020-07-07 11:49:46,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:49:46,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:49:46,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:49:46,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:49:46,603 INFO L87 Difference]: Start difference. First operand 363876 states and 567172 transitions. Second operand 5 states.