/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.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:38:31,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:38:31,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:38:31,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:38:31,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:38:31,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:38:31,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:38:31,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:38:31,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:38:31,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:38:31,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:38:31,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:38:31,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:38:31,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:38:31,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:38:31,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:38:31,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:38:31,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:38:31,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:38:31,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:38:31,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:38:31,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:38:31,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:38:31,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:38:31,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:38:31,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:38:31,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:38:31,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:38:31,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:38:31,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:38:31,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:38:31,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:38:31,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:38:31,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:38:31,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:38:31,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:38:31,261 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 11:38:31,292 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:38:31,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:38:31,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:38:31,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:38:31,294 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:38:31,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:38:31,295 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:38:31,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:38:31,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:38:31,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:38:31,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:38:31,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:38:31,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:38:31,296 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:38:31,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:38:31,296 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:38:31,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:38:31,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:38:31,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:38:31,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:38:31,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:38:31,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:38:31,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:38:31,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:38:31,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:38:31,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:38:31,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:38:31,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:38:31,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:38:31,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:38:31,569 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:38:31,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:38:31,591 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:38:31,593 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:38:31,593 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:38:31,594 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-07 11:38:31,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200911a45/e845cc6c91d84f4d9072e5ad3bf6b2af/FLAGd872c38f7 [2020-07-07 11:38:32,361 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:38:32,362 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-07 11:38:32,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200911a45/e845cc6c91d84f4d9072e5ad3bf6b2af/FLAGd872c38f7 [2020-07-07 11:38:32,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200911a45/e845cc6c91d84f4d9072e5ad3bf6b2af [2020-07-07 11:38:32,483 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:38:32,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:38:32,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:38:32,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:38:32,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:38:32,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:38:32" (1/1) ... [2020-07-07 11:38:32,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e69c3a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:32, skipping insertion in model container [2020-07-07 11:38:32,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:38:32" (1/1) ... [2020-07-07 11:38:32,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:38:32,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:38:34,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:38:34,285 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:38:35,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:38:35,358 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:38:35,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:35 WrapperNode [2020-07-07 11:38:35,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:38:35,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:38:35,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:38:35,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:38:35,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:35" (1/1) ... [2020-07-07 11:38:35,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:35" (1/1) ... [2020-07-07 11:38:35,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:35" (1/1) ... [2020-07-07 11:38:35,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:35" (1/1) ... [2020-07-07 11:38:35,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:35" (1/1) ... [2020-07-07 11:38:35,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:35" (1/1) ... [2020-07-07 11:38:35,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:35" (1/1) ... [2020-07-07 11:38:35,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:38:35,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:38:35,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:38:35,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:38:35,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:35" (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 11:38:35,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:38:35,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:38:35,624 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:38:35,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:38:35,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:38:35,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 11:38:35,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 11:38:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-07 11:38:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:38:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:38:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-07 11:38:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-07 11:38:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-07 11:38:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-07 11:38:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-07 11:38:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-07 11:38:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-07 11:38:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-07 11:38:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-07 11:38:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:38:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:38:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:38:39,636 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:38:39,637 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:38:39,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:38:39 BoogieIcfgContainer [2020-07-07 11:38:39,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:38:39,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:38:39,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:38:39,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:38:39,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:38:32" (1/3) ... [2020-07-07 11:38:39,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71cff255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:38:39, skipping insertion in model container [2020-07-07 11:38:39,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:38:35" (2/3) ... [2020-07-07 11:38:39,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71cff255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:38:39, skipping insertion in model container [2020-07-07 11:38:39,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:38:39" (3/3) ... [2020-07-07 11:38:39,660 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-07 11:38:39,670 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:38:39,679 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-07 11:38:39,692 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-07 11:38:39,719 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:38:39,719 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:38:39,719 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:38:39,720 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:38:39,720 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:38:39,720 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:38:39,720 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:38:39,720 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:38:39,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states. [2020-07-07 11:38:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-07 11:38:39,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:38:39,807 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] [2020-07-07 11:38:39,807 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:38:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:38:39,814 INFO L82 PathProgramCache]: Analyzing trace with hash -856462850, now seen corresponding path program 1 times [2020-07-07 11:38:39,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:38:39,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93060912] [2020-07-07 11:38:39,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:38:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:38:43,186 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:38:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:38:43,511 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 11:38:43,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93060912] [2020-07-07 11:38:43,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:38:43,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:38:43,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828703550] [2020-07-07 11:38:43,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:38:43,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:38:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:38:43,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:38:43,530 INFO L87 Difference]: Start difference. First operand 1371 states. Second operand 5 states. [2020-07-07 11:38:58,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:38:58,601 INFO L93 Difference]: Finished difference Result 4059 states and 7350 transitions. [2020-07-07 11:38:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:38:58,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 464 [2020-07-07 11:38:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:38:58,647 INFO L225 Difference]: With dead ends: 4059 [2020-07-07 11:38:58,647 INFO L226 Difference]: Without dead ends: 2697 [2020-07-07 11:38:58,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:38:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2020-07-07 11:38:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2647. [2020-07-07 11:38:58,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2647 states. [2020-07-07 11:38:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 4347 transitions. [2020-07-07 11:38:58,886 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 4347 transitions. Word has length 464 [2020-07-07 11:38:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:38:58,888 INFO L479 AbstractCegarLoop]: Abstraction has 2647 states and 4347 transitions. [2020-07-07 11:38:58,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:38:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 4347 transitions. [2020-07-07 11:38:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-07-07 11:38:58,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:38:58,905 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] [2020-07-07 11:38:58,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:38:58,905 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:38:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:38:58,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1286826198, now seen corresponding path program 1 times [2020-07-07 11:38:58,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:38:58,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973957321] [2020-07-07 11:38:58,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:38:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:00,347 WARN L193 SmtUtils]: Spent 980.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:39:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:01,017 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 11:39:01,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973957321] [2020-07-07 11:39:01,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:39:01,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:39:01,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764771118] [2020-07-07 11:39:01,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:39:01,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:39:01,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:39:01,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:01,021 INFO L87 Difference]: Start difference. First operand 2647 states and 4347 transitions. Second operand 4 states. [2020-07-07 11:39:17,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:39:17,181 INFO L93 Difference]: Finished difference Result 7670 states and 12560 transitions. [2020-07-07 11:39:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:39:17,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2020-07-07 11:39:17,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:39:17,211 INFO L225 Difference]: With dead ends: 7670 [2020-07-07 11:39:17,211 INFO L226 Difference]: Without dead ends: 5237 [2020-07-07 11:39:17,217 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 11:39:17,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5237 states. [2020-07-07 11:39:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5237 to 5189. [2020-07-07 11:39:17,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5189 states. [2020-07-07 11:39:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 8497 transitions. [2020-07-07 11:39:17,405 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 8497 transitions. Word has length 466 [2020-07-07 11:39:17,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:39:17,408 INFO L479 AbstractCegarLoop]: Abstraction has 5189 states and 8497 transitions. [2020-07-07 11:39:17,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:39:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 8497 transitions. [2020-07-07 11:39:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-07 11:39:17,424 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:39:17,425 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] [2020-07-07 11:39:17,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:39:17,426 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:39:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:39:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash -244647039, now seen corresponding path program 1 times [2020-07-07 11:39:17,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:39:17,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553548118] [2020-07-07 11:39:17,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:39:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:18,434 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:39:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:18,606 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 11:39:18,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553548118] [2020-07-07 11:39:18,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:39:18,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:39:18,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104257458] [2020-07-07 11:39:18,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:39:18,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:39:18,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:39:18,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:18,609 INFO L87 Difference]: Start difference. First operand 5189 states and 8497 transitions. Second operand 4 states. [2020-07-07 11:39:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:39:34,609 INFO L93 Difference]: Finished difference Result 15470 states and 25323 transitions. [2020-07-07 11:39:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:39:34,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-07-07 11:39:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:39:34,655 INFO L225 Difference]: With dead ends: 15470 [2020-07-07 11:39:34,656 INFO L226 Difference]: Without dead ends: 10333 [2020-07-07 11:39:34,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10333 states. [2020-07-07 11:39:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10333 to 5236. [2020-07-07 11:39:34,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5236 states. [2020-07-07 11:39:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 8571 transitions. [2020-07-07 11:39:34,882 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 8571 transitions. Word has length 467 [2020-07-07 11:39:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:39:34,883 INFO L479 AbstractCegarLoop]: Abstraction has 5236 states and 8571 transitions. [2020-07-07 11:39:34,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:39:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 8571 transitions. [2020-07-07 11:39:34,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-07 11:39:34,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:39:34,897 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] [2020-07-07 11:39:34,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:39:34,898 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:39:34,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:39:34,899 INFO L82 PathProgramCache]: Analyzing trace with hash 536524677, now seen corresponding path program 1 times [2020-07-07 11:39:34,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:39:34,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734065118] [2020-07-07 11:39:34,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:39:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:36,074 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:39:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:36,326 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 11:39:36,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734065118] [2020-07-07 11:39:36,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:39:36,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:39:36,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967572603] [2020-07-07 11:39:36,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:39:36,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:39:36,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:39:36,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:36,329 INFO L87 Difference]: Start difference. First operand 5236 states and 8571 transitions. Second operand 4 states. [2020-07-07 11:39:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:39:52,652 INFO L93 Difference]: Finished difference Result 15048 states and 24542 transitions. [2020-07-07 11:39:52,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:39:52,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-07-07 11:39:52,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:39:52,688 INFO L225 Difference]: With dead ends: 15048 [2020-07-07 11:39:52,689 INFO L226 Difference]: Without dead ends: 10211 [2020-07-07 11:39:52,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2020-07-07 11:39:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 10165. [2020-07-07 11:39:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10165 states. [2020-07-07 11:39:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10165 states to 10165 states and 16557 transitions. [2020-07-07 11:39:53,049 INFO L78 Accepts]: Start accepts. Automaton has 10165 states and 16557 transitions. Word has length 468 [2020-07-07 11:39:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:39:53,050 INFO L479 AbstractCegarLoop]: Abstraction has 10165 states and 16557 transitions. [2020-07-07 11:39:53,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:39:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 10165 states and 16557 transitions. [2020-07-07 11:39:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-07 11:39:53,074 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:39:53,075 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] [2020-07-07 11:39:53,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:39:53,075 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:39:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:39:53,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1157993354, now seen corresponding path program 1 times [2020-07-07 11:39:53,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:39:53,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795799406] [2020-07-07 11:39:53,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:39:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:53,974 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:39:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:39:54,207 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 11:39:54,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795799406] [2020-07-07 11:39:54,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:39:54,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:39:54,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821873376] [2020-07-07 11:39:54,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:39:54,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:39:54,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:39:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:39:54,210 INFO L87 Difference]: Start difference. First operand 10165 states and 16557 transitions. Second operand 4 states. [2020-07-07 11:40:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:40:11,247 INFO L93 Difference]: Finished difference Result 30239 states and 49226 transitions. [2020-07-07 11:40:11,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:40:11,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-07-07 11:40:11,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:40:11,287 INFO L225 Difference]: With dead ends: 30239 [2020-07-07 11:40:11,287 INFO L226 Difference]: Without dead ends: 20218 [2020-07-07 11:40:11,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:11,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20218 states. [2020-07-07 11:40:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20218 to 10263. [2020-07-07 11:40:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10263 states. [2020-07-07 11:40:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 16708 transitions. [2020-07-07 11:40:11,695 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 16708 transitions. Word has length 468 [2020-07-07 11:40:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:40:11,695 INFO L479 AbstractCegarLoop]: Abstraction has 10263 states and 16708 transitions. [2020-07-07 11:40:11,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:40:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 16708 transitions. [2020-07-07 11:40:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-07 11:40:11,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:40:11,715 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] [2020-07-07 11:40:11,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:40:11,716 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:40:11,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:40:11,716 INFO L82 PathProgramCache]: Analyzing trace with hash 284183058, now seen corresponding path program 1 times [2020-07-07 11:40:11,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:40:11,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797100862] [2020-07-07 11:40:11,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:40:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:12,601 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:40:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:12,862 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 11:40:12,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797100862] [2020-07-07 11:40:12,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:40:12,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:40:12,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235349770] [2020-07-07 11:40:12,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:40:12,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:40:12,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:40:12,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:12,866 INFO L87 Difference]: Start difference. First operand 10263 states and 16708 transitions. Second operand 4 states. [2020-07-07 11:40:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:40:30,229 INFO L93 Difference]: Finished difference Result 30374 states and 49407 transitions. [2020-07-07 11:40:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:40:30,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-07-07 11:40:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:40:30,279 INFO L225 Difference]: With dead ends: 30374 [2020-07-07 11:40:30,279 INFO L226 Difference]: Without dead ends: 20335 [2020-07-07 11:40:30,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20335 states. [2020-07-07 11:40:30,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20335 to 10380. [2020-07-07 11:40:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10380 states. [2020-07-07 11:40:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 16854 transitions. [2020-07-07 11:40:30,850 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 16854 transitions. Word has length 469 [2020-07-07 11:40:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:40:30,851 INFO L479 AbstractCegarLoop]: Abstraction has 10380 states and 16854 transitions. [2020-07-07 11:40:30,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:40:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 16854 transitions. [2020-07-07 11:40:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-07 11:40:30,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:40:30,867 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] [2020-07-07 11:40:30,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:40:30,868 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:40:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:40:30,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2073063424, now seen corresponding path program 1 times [2020-07-07 11:40:30,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:40:30,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327284037] [2020-07-07 11:40:30,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:40:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:32,016 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:40:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:32,359 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 11:40:32,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327284037] [2020-07-07 11:40:32,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:40:32,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:40:32,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073052894] [2020-07-07 11:40:32,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:40:32,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:40:32,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:40:32,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:32,363 INFO L87 Difference]: Start difference. First operand 10380 states and 16854 transitions. Second operand 4 states. [2020-07-07 11:40:49,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:40:49,948 INFO L93 Difference]: Finished difference Result 29456 states and 47707 transitions. [2020-07-07 11:40:49,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:40:49,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-07-07 11:40:49,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:40:49,981 INFO L225 Difference]: With dead ends: 29456 [2020-07-07 11:40:49,981 INFO L226 Difference]: Without dead ends: 20045 [2020-07-07 11:40:49,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:40:50,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20045 states. [2020-07-07 11:40:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20045 to 20001. [2020-07-07 11:40:50,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20001 states. [2020-07-07 11:40:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 32327 transitions. [2020-07-07 11:40:50,742 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 32327 transitions. Word has length 470 [2020-07-07 11:40:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:40:50,742 INFO L479 AbstractCegarLoop]: Abstraction has 20001 states and 32327 transitions. [2020-07-07 11:40:50,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:40:50,743 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 32327 transitions. [2020-07-07 11:40:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-07 11:40:50,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:40:50,764 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] [2020-07-07 11:40:50,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 11:40:50,765 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:40:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:40:50,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1777003357, now seen corresponding path program 1 times [2020-07-07 11:40:50,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:40:50,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808194168] [2020-07-07 11:40:50,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:40:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:52,874 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:40:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:40:53,031 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 11:40:53,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808194168] [2020-07-07 11:40:53,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:40:53,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:40:53,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10557118] [2020-07-07 11:40:53,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:40:53,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:40:53,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:40:53,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:40:53,033 INFO L87 Difference]: Start difference. First operand 20001 states and 32327 transitions. Second operand 5 states. [2020-07-07 11:41:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:41:07,368 INFO L93 Difference]: Finished difference Result 47599 states and 77546 transitions. [2020-07-07 11:41:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:41:07,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 470 [2020-07-07 11:41:07,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:41:07,402 INFO L225 Difference]: With dead ends: 47599 [2020-07-07 11:41:07,403 INFO L226 Difference]: Without dead ends: 24408 [2020-07-07 11:41:07,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:41:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24408 states. [2020-07-07 11:41:09,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24408 to 24355. [2020-07-07 11:41:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24355 states. [2020-07-07 11:41:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24355 states to 24355 states and 39550 transitions. [2020-07-07 11:41:09,375 INFO L78 Accepts]: Start accepts. Automaton has 24355 states and 39550 transitions. Word has length 470 [2020-07-07 11:41:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:41:09,375 INFO L479 AbstractCegarLoop]: Abstraction has 24355 states and 39550 transitions. [2020-07-07 11:41:09,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:41:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 24355 states and 39550 transitions. [2020-07-07 11:41:09,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-07 11:41:09,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:41:09,398 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] [2020-07-07 11:41:09,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:41:09,398 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:41:09,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:41:09,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1583646567, now seen corresponding path program 1 times [2020-07-07 11:41:09,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:41:09,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862707489] [2020-07-07 11:41:09,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:41:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:10,584 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:41:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:10,892 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 11:41:10,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862707489] [2020-07-07 11:41:10,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:41:10,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:41:10,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601685995] [2020-07-07 11:41:10,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:41:10,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:41:10,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:41:10,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:10,895 INFO L87 Difference]: Start difference. First operand 24355 states and 39550 transitions. Second operand 4 states. [2020-07-07 11:41:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:41:30,072 INFO L93 Difference]: Finished difference Result 71217 states and 115711 transitions. [2020-07-07 11:41:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:41:30,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-07-07 11:41:30,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:41:30,127 INFO L225 Difference]: With dead ends: 71217 [2020-07-07 11:41:30,132 INFO L226 Difference]: Without dead ends: 47882 [2020-07-07 11:41:30,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47882 states. [2020-07-07 11:41:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47882 to 47846. [2020-07-07 11:41:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47846 states. [2020-07-07 11:41:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47846 states to 47846 states and 77425 transitions. [2020-07-07 11:41:31,961 INFO L78 Accepts]: Start accepts. Automaton has 47846 states and 77425 transitions. Word has length 472 [2020-07-07 11:41:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:41:31,962 INFO L479 AbstractCegarLoop]: Abstraction has 47846 states and 77425 transitions. [2020-07-07 11:41:31,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:41:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 47846 states and 77425 transitions. [2020-07-07 11:41:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-07 11:41:32,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:41:32,004 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 11:41:32,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 11:41:32,004 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:41:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:41:32,005 INFO L82 PathProgramCache]: Analyzing trace with hash 832056112, now seen corresponding path program 1 times [2020-07-07 11:41:32,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:41:32,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348467415] [2020-07-07 11:41:32,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:41:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:32,929 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:41:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:33,100 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 11:41:33,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348467415] [2020-07-07 11:41:33,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:41:33,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:41:33,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049458606] [2020-07-07 11:41:33,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:41:33,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:41:33,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:41:33,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:33,105 INFO L87 Difference]: Start difference. First operand 47846 states and 77425 transitions. Second operand 4 states. [2020-07-07 11:41:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:41:47,332 INFO L93 Difference]: Finished difference Result 138790 states and 224305 transitions. [2020-07-07 11:41:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:41:47,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-07 11:41:47,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:41:47,516 INFO L225 Difference]: With dead ends: 138790 [2020-07-07 11:41:47,516 INFO L226 Difference]: Without dead ends: 93337 [2020-07-07 11:41:47,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93337 states. [2020-07-07 11:41:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93337 to 48236. [2020-07-07 11:41:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48236 states. [2020-07-07 11:41:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48236 states to 48236 states and 78001 transitions. [2020-07-07 11:41:49,391 INFO L78 Accepts]: Start accepts. Automaton has 48236 states and 78001 transitions. Word has length 473 [2020-07-07 11:41:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:41:49,391 INFO L479 AbstractCegarLoop]: Abstraction has 48236 states and 78001 transitions. [2020-07-07 11:41:49,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:41:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 48236 states and 78001 transitions. [2020-07-07 11:41:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-07 11:41:49,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:41:49,443 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] [2020-07-07 11:41:49,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 11:41:49,443 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:41:49,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:41:49,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1772484418, now seen corresponding path program 1 times [2020-07-07 11:41:49,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:41:49,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760360366] [2020-07-07 11:41:49,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:41:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:50,931 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:41:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:41:51,159 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 11:41:51,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760360366] [2020-07-07 11:41:51,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:41:51,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:41:51,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876230947] [2020-07-07 11:41:51,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:41:51,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:41:51,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:41:51,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:41:51,162 INFO L87 Difference]: Start difference. First operand 48236 states and 78001 transitions. Second operand 4 states. [2020-07-07 11:42:13,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:42:13,307 INFO L93 Difference]: Finished difference Result 140167 states and 226533 transitions. [2020-07-07 11:42:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:42:13,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2020-07-07 11:42:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:42:13,398 INFO L225 Difference]: With dead ends: 140167 [2020-07-07 11:42:13,398 INFO L226 Difference]: Without dead ends: 94781 [2020-07-07 11:42:13,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:42:13,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94781 states. [2020-07-07 11:42:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94781 to 94747. [2020-07-07 11:42:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94747 states. [2020-07-07 11:42:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94747 states to 94747 states and 152646 transitions. [2020-07-07 11:42:17,679 INFO L78 Accepts]: Start accepts. Automaton has 94747 states and 152646 transitions. Word has length 474 [2020-07-07 11:42:17,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:42:17,679 INFO L479 AbstractCegarLoop]: Abstraction has 94747 states and 152646 transitions. [2020-07-07 11:42:17,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:42:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 94747 states and 152646 transitions. [2020-07-07 11:42:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-07 11:42:17,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:42:17,751 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] [2020-07-07 11:42:17,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 11:42:17,752 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:42:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:42:17,752 INFO L82 PathProgramCache]: Analyzing trace with hash -869161505, now seen corresponding path program 1 times [2020-07-07 11:42:17,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:42:17,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345352832] [2020-07-07 11:42:17,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:42:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:42:19,404 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:42:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:42:21,581 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 11:42:21,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345352832] [2020-07-07 11:42:21,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:42:21,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:42:21,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957266382] [2020-07-07 11:42:21,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:42:21,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:42:21,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:42:21,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:42:21,583 INFO L87 Difference]: Start difference. First operand 94747 states and 152646 transitions. Second operand 5 states. [2020-07-07 11:42:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:42:41,908 INFO L93 Difference]: Finished difference Result 233316 states and 378328 transitions. [2020-07-07 11:42:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:42:41,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 474 [2020-07-07 11:42:41,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:42:42,027 INFO L225 Difference]: With dead ends: 233316 [2020-07-07 11:42:42,027 INFO L226 Difference]: Without dead ends: 120293 [2020-07-07 11:42:42,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:42:42,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120293 states. [2020-07-07 11:42:49,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120293 to 120214. [2020-07-07 11:42:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120214 states. [2020-07-07 11:42:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120214 states to 120214 states and 194430 transitions. [2020-07-07 11:42:49,573 INFO L78 Accepts]: Start accepts. Automaton has 120214 states and 194430 transitions. Word has length 474 [2020-07-07 11:42:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:42:49,574 INFO L479 AbstractCegarLoop]: Abstraction has 120214 states and 194430 transitions. [2020-07-07 11:42:49,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:42:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 120214 states and 194430 transitions. [2020-07-07 11:42:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-07 11:42:49,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:42:49,671 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 11:42:49,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 11:42:49,671 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:42:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:42:49,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2045453381, now seen corresponding path program 1 times [2020-07-07 11:42:49,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:42:49,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761191431] [2020-07-07 11:42:49,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:42:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:42:50,891 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:42:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:42:51,124 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 11:42:51,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761191431] [2020-07-07 11:42:51,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:42:51,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 11:42:51,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586656195] [2020-07-07 11:42:51,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:42:51,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:42:51,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:42:51,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:42:51,126 INFO L87 Difference]: Start difference. First operand 120214 states and 194430 transitions. Second operand 7 states. [2020-07-07 11:42:51,969 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 399 [2020-07-07 11:43:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:43:11,782 INFO L93 Difference]: Finished difference Result 206583 states and 326042 transitions. [2020-07-07 11:43:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:43:11,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 476 [2020-07-07 11:43:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:43:11,928 INFO L225 Difference]: With dead ends: 206583 [2020-07-07 11:43:11,928 INFO L226 Difference]: Without dead ends: 157048 [2020-07-07 11:43:11,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:43:12,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157048 states. [2020-07-07 11:43:19,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157048 to 157046. [2020-07-07 11:43:19,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157046 states. [2020-07-07 11:43:19,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157046 states to 157046 states and 249638 transitions. [2020-07-07 11:43:19,792 INFO L78 Accepts]: Start accepts. Automaton has 157046 states and 249638 transitions. Word has length 476 [2020-07-07 11:43:19,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:43:19,792 INFO L479 AbstractCegarLoop]: Abstraction has 157046 states and 249638 transitions. [2020-07-07 11:43:19,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:43:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 157046 states and 249638 transitions. [2020-07-07 11:43:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-07 11:43:19,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:43:19,909 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 11:43:19,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 11:43:19,909 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:43:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:43:19,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1539997558, now seen corresponding path program 1 times [2020-07-07 11:43:19,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:43:19,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774685266] [2020-07-07 11:43:19,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:43:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:24,152 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:43:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:43:24,592 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 11:43:24,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774685266] [2020-07-07 11:43:24,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:43:24,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-07 11:43:24,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265058407] [2020-07-07 11:43:24,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:43:24,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:43:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:43:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:43:24,594 INFO L87 Difference]: Start difference. First operand 157046 states and 249638 transitions. Second operand 16 states. [2020-07-07 11:43:25,648 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification that was a NOOP. DAG size: 427 [2020-07-07 11:44:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:44:04,932 INFO L93 Difference]: Finished difference Result 351488 states and 553057 transitions. [2020-07-07 11:44:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:44:04,933 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 476 [2020-07-07 11:44:04,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:44:05,223 INFO L225 Difference]: With dead ends: 351488 [2020-07-07 11:44:05,224 INFO L226 Difference]: Without dead ends: 324761 [2020-07-07 11:44:05,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 11:44:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324761 states. [2020-07-07 11:44:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324761 to 296074. [2020-07-07 11:44:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296074 states. [2020-07-07 11:44:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296074 states to 296074 states and 465226 transitions. [2020-07-07 11:44:31,561 INFO L78 Accepts]: Start accepts. Automaton has 296074 states and 465226 transitions. Word has length 476 [2020-07-07 11:44:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:44:31,561 INFO L479 AbstractCegarLoop]: Abstraction has 296074 states and 465226 transitions. [2020-07-07 11:44:31,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:44:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 296074 states and 465226 transitions. [2020-07-07 11:44:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-07 11:44:31,748 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:44:31,749 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 11:44:31,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 11:44:31,749 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:44:31,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:44:31,749 INFO L82 PathProgramCache]: Analyzing trace with hash -450585505, now seen corresponding path program 1 times [2020-07-07 11:44:31,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:44:31,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529469133] [2020-07-07 11:44:31,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:44:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:33,793 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:44:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:44:34,164 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 11:44:34,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529469133] [2020-07-07 11:44:34,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:44:34,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-07 11:44:34,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470407249] [2020-07-07 11:44:34,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 11:44:34,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:44:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 11:44:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:44:34,167 INFO L87 Difference]: Start difference. First operand 296074 states and 465226 transitions. Second operand 17 states. [2020-07-07 11:44:36,348 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 410 DAG size of output: 408 [2020-07-07 11:45:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:45:42,507 INFO L93 Difference]: Finished difference Result 586604 states and 930961 transitions. [2020-07-07 11:45:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-07 11:45:42,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-07-07 11:45:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:45:43,002 INFO L225 Difference]: With dead ends: 586604 [2020-07-07 11:45:43,002 INFO L226 Difference]: Without dead ends: 486137 [2020-07-07 11:45:43,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=591, Invalid=1479, Unknown=0, NotChecked=0, Total=2070 [2020-07-07 11:45:43,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486137 states. [2020-07-07 11:46:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486137 to 403686. [2020-07-07 11:46:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403686 states. [2020-07-07 11:46:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403686 states to 403686 states and 641042 transitions. [2020-07-07 11:46:20,904 INFO L78 Accepts]: Start accepts. Automaton has 403686 states and 641042 transitions. Word has length 476 [2020-07-07 11:46:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:46:20,905 INFO L479 AbstractCegarLoop]: Abstraction has 403686 states and 641042 transitions. [2020-07-07 11:46:20,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 11:46:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 403686 states and 641042 transitions. [2020-07-07 11:46:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-07 11:46:22,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:46:22,029 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 11:46:22,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 11:46:22,030 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:46:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:46:22,030 INFO L82 PathProgramCache]: Analyzing trace with hash -290890227, now seen corresponding path program 1 times [2020-07-07 11:46:22,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:46:22,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741478115] [2020-07-07 11:46:22,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:46:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:23,889 WARN L193 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:46:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:46:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:46:24,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741478115] [2020-07-07 11:46:24,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:46:24,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-07 11:46:24,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304580914] [2020-07-07 11:46:24,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:46:24,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:46:24,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:46:24,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:46:24,351 INFO L87 Difference]: Start difference. First operand 403686 states and 641042 transitions. Second operand 18 states. [2020-07-07 11:46:26,893 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 423 DAG size of output: 417 [2020-07-07 11:47:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:47:39,322 INFO L93 Difference]: Finished difference Result 641145 states and 1024669 transitions. [2020-07-07 11:47:39,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 11:47:39,324 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 476 [2020-07-07 11:47:39,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:47:39,866 INFO L225 Difference]: With dead ends: 641145 [2020-07-07 11:47:39,866 INFO L226 Difference]: Without dead ends: 544474 [2020-07-07 11:47:39,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 11:47:40,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544474 states. [2020-07-07 11:48:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544474 to 407750. [2020-07-07 11:48:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407750 states. [2020-07-07 11:48:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407750 states to 407750 states and 646850 transitions. [2020-07-07 11:48:22,952 INFO L78 Accepts]: Start accepts. Automaton has 407750 states and 646850 transitions. Word has length 476 [2020-07-07 11:48:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:48:22,953 INFO L479 AbstractCegarLoop]: Abstraction has 407750 states and 646850 transitions. [2020-07-07 11:48:22,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:48:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 407750 states and 646850 transitions. [2020-07-07 11:48:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-07 11:48:23,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:48:23,168 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 11:48:23,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 11:48:23,168 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:48:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:48:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2013494006, now seen corresponding path program 1 times [2020-07-07 11:48:23,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:48:23,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157854655] [2020-07-07 11:48:23,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:48:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:25,432 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-07 11:48:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:48:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:48:25,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157854655] [2020-07-07 11:48:25,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:48:25,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:48:25,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893949122] [2020-07-07 11:48:25,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:48:25,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:48:25,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:48:25,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:48:25,656 INFO L87 Difference]: Start difference. First operand 407750 states and 646850 transitions. Second operand 5 states. [2020-07-07 11:49:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:49:58,930 INFO L93 Difference]: Finished difference Result 1202018 states and 1907361 transitions. [2020-07-07 11:49:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:49:58,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-07-07 11:49:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:50:00,050 INFO L225 Difference]: With dead ends: 1202018 [2020-07-07 11:50:00,050 INFO L226 Difference]: Without dead ends: 798470 [2020-07-07 11:50:00,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:50:00,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798470 states.