/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 --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 22:12:39,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 22:12:39,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 22:12:39,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 22:12:39,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 22:12:39,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 22:12:39,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 22:12:39,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 22:12:39,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 22:12:39,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 22:12:39,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 22:12:39,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 22:12:39,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 22:12:39,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 22:12:39,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 22:12:39,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 22:12:39,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 22:12:39,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 22:12:39,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 22:12:39,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 22:12:39,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 22:12:39,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 22:12:39,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 22:12:39,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 22:12:39,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 22:12:39,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 22:12:39,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 22:12:39,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 22:12:39,407 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 [2020-07-19 22:12:39,442 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 22:12:39,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 22:12:39,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 22:12:39,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 22:12:39,444 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 22:12:39,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 22:12:39,445 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 22:12:39,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 22:12:39,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 22:12:39,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 22:12:39,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 22:12:39,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 22:12:39,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 22:12:39,449 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 22:12:39,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 22:12:39,449 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 22:12:39,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 22:12:39,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 22:12:39,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 22:12:39,450 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 22:12:39,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 22:12:39,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 22:12:39,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 22:12:39,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 22:12:39,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 22:12:39,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 22:12:39,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 22:12:39,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 22:12:39,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 22:12:39,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 22:12:39,725 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 22:12:39,742 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 22:12:39,746 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 22:12:39,748 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 22:12:39,749 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 22:12:39,749 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-19 22:12:39,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8039f9b6b/2416432e37ab45c39e6672c71bc8138e/FLAG622abd7a7 [2020-07-19 22:12:40,592 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 22:12:40,593 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-19 22:12:40,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8039f9b6b/2416432e37ab45c39e6672c71bc8138e/FLAG622abd7a7 [2020-07-19 22:12:41,147 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8039f9b6b/2416432e37ab45c39e6672c71bc8138e [2020-07-19 22:12:41,159 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 22:12:41,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 22:12:41,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 22:12:41,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 22:12:41,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 22:12:41,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:12:41" (1/1) ... [2020-07-19 22:12:41,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6078b861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:41, skipping insertion in model container [2020-07-19 22:12:41,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:12:41" (1/1) ... [2020-07-19 22:12:41,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 22:12:41,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 22:12:42,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 22:12:42,892 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 22:12:44,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 22:12:44,491 INFO L208 MainTranslator]: Completed translation [2020-07-19 22:12:44,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:44 WrapperNode [2020-07-19 22:12:44,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 22:12:44,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 22:12:44,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 22:12:44,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 22:12:44,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:44" (1/1) ... [2020-07-19 22:12:44,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:44" (1/1) ... [2020-07-19 22:12:44,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:44" (1/1) ... [2020-07-19 22:12:44,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:44" (1/1) ... [2020-07-19 22:12:44,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:44" (1/1) ... [2020-07-19 22:12:44,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:44" (1/1) ... [2020-07-19 22:12:44,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:44" (1/1) ... [2020-07-19 22:12:44,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 22:12:44,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 22:12:44,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 22:12:44,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 22:12:44,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:44" (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 [2020-07-19 22:12:44,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 22:12:44,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 22:12:44,804 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 22:12:44,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 22:12:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 22:12:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-19 22:12:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-19 22:12:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-19 22:12:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-19 22:12:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 22:12:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 22:12:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-19 22:12:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-19 22:12:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-19 22:12:44,808 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-19 22:12:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-19 22:12:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-19 22:12:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-19 22:12:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-19 22:12:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-19 22:12:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 22:12:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 22:12:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 22:12:48,959 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 22:12:48,960 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 22:12:48,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:12:48 BoogieIcfgContainer [2020-07-19 22:12:48,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 22:12:48,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 22:12:48,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 22:12:48,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 22:12:48,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:12:41" (1/3) ... [2020-07-19 22:12:48,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1772cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:12:48, skipping insertion in model container [2020-07-19 22:12:48,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:12:44" (2/3) ... [2020-07-19 22:12:48,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1772cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:12:48, skipping insertion in model container [2020-07-19 22:12:48,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:12:48" (3/3) ... [2020-07-19 22:12:48,981 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-19 22:12:48,993 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 22:12:49,002 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 22:12:49,018 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 22:12:49,047 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 22:12:49,047 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 22:12:49,047 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 22:12:49,047 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 22:12:49,048 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 22:12:49,048 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 22:12:49,048 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 22:12:49,048 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 22:12:49,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2020-07-19 22:12:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-19 22:12:49,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:12:49,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:12:49,156 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:12:49,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:12:49,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times [2020-07-19 22:12:49,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:12:49,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719613679] [2020-07-19 22:12:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:12:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:12:51,957 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:12:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:12:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:12:52,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719613679] [2020-07-19 22:12:52,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:12:52,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:12:52,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297476824] [2020-07-19 22:12:52,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:12:52,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:12:52,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:12:52,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:12:52,293 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 4 states. [2020-07-19 22:12:53,076 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-07-19 22:13:03,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:13:03,348 INFO L93 Difference]: Finished difference Result 2488 states and 4423 transitions. [2020-07-19 22:13:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 22:13:03,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-19 22:13:03,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:13:03,391 INFO L225 Difference]: With dead ends: 2488 [2020-07-19 22:13:03,391 INFO L226 Difference]: Without dead ends: 2186 [2020-07-19 22:13:03,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:13:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-07-19 22:13:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2020-07-19 22:13:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-07-19 22:13:03,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3563 transitions. [2020-07-19 22:13:03,582 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3563 transitions. Word has length 496 [2020-07-19 22:13:03,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:13:03,587 INFO L479 AbstractCegarLoop]: Abstraction has 2184 states and 3563 transitions. [2020-07-19 22:13:03,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:13:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3563 transitions. [2020-07-19 22:13:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-19 22:13:03,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:13:03,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:13:03,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 22:13:03,605 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:13:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:13:03,605 INFO L82 PathProgramCache]: Analyzing trace with hash 426855444, now seen corresponding path program 1 times [2020-07-19 22:13:03,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:13:03,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413183658] [2020-07-19 22:13:03,606 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:13:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:13:06,126 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:13:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:13:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:13:06,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413183658] [2020-07-19 22:13:06,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:13:06,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:13:06,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49934079] [2020-07-19 22:13:06,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:13:06,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:13:06,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:13:06,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:13:06,930 INFO L87 Difference]: Start difference. First operand 2184 states and 3563 transitions. Second operand 5 states. [2020-07-19 22:13:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:13:22,355 INFO L93 Difference]: Finished difference Result 6476 states and 10564 transitions. [2020-07-19 22:13:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 22:13:22,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-07-19 22:13:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:13:22,385 INFO L225 Difference]: With dead ends: 6476 [2020-07-19 22:13:22,386 INFO L226 Difference]: Without dead ends: 4309 [2020-07-19 22:13:22,400 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 [2020-07-19 22:13:22,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2020-07-19 22:13:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 4307. [2020-07-19 22:13:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4307 states. [2020-07-19 22:13:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 7000 transitions. [2020-07-19 22:13:22,651 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 7000 transitions. Word has length 496 [2020-07-19 22:13:22,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:13:22,652 INFO L479 AbstractCegarLoop]: Abstraction has 4307 states and 7000 transitions. [2020-07-19 22:13:22,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 22:13:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 7000 transitions. [2020-07-19 22:13:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-19 22:13:22,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:13:22,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:13:22,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 22:13:22,669 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:13:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:13:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash 589891249, now seen corresponding path program 1 times [2020-07-19 22:13:22,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:13:22,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306634234] [2020-07-19 22:13:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:13:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:13:23,919 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:13:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:13:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:13:24,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306634234] [2020-07-19 22:13:24,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:13:24,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:13:24,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197171512] [2020-07-19 22:13:24,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:13:24,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:13:24,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:13:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:13:24,407 INFO L87 Difference]: Start difference. First operand 4307 states and 7000 transitions. Second operand 4 states. [2020-07-19 22:13:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:13:42,153 INFO L93 Difference]: Finished difference Result 12605 states and 20441 transitions. [2020-07-19 22:13:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:13:42,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-19 22:13:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:13:42,196 INFO L225 Difference]: With dead ends: 12605 [2020-07-19 22:13:42,197 INFO L226 Difference]: Without dead ends: 8512 [2020-07-19 22:13:42,207 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 [2020-07-19 22:13:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8512 states. [2020-07-19 22:13:42,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8512 to 8510. [2020-07-19 22:13:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8510 states. [2020-07-19 22:13:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 13785 transitions. [2020-07-19 22:13:42,513 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 13785 transitions. Word has length 498 [2020-07-19 22:13:42,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:13:42,513 INFO L479 AbstractCegarLoop]: Abstraction has 8510 states and 13785 transitions. [2020-07-19 22:13:42,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:13:42,514 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 13785 transitions. [2020-07-19 22:13:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-19 22:13:42,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:13:42,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:13:42,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 22:13:42,537 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:13:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:13:42,538 INFO L82 PathProgramCache]: Analyzing trace with hash -844140139, now seen corresponding path program 1 times [2020-07-19 22:13:42,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:13:42,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554336294] [2020-07-19 22:13:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:13:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:13:43,480 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:13:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:13:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:13:43,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554336294] [2020-07-19 22:13:43,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:13:43,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:13:43,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610834883] [2020-07-19 22:13:43,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:13:43,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:13:43,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:13:43,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:13:43,708 INFO L87 Difference]: Start difference. First operand 8510 states and 13785 transitions. Second operand 4 states. [2020-07-19 22:14:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:14:02,580 INFO L93 Difference]: Finished difference Result 25433 states and 41187 transitions. [2020-07-19 22:14:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:14:02,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-07-19 22:14:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:14:02,649 INFO L225 Difference]: With dead ends: 25433 [2020-07-19 22:14:02,649 INFO L226 Difference]: Without dead ends: 16975 [2020-07-19 22:14:02,671 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 [2020-07-19 22:14:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16975 states. [2020-07-19 22:14:03,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16975 to 8557. [2020-07-19 22:14:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8557 states. [2020-07-19 22:14:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8557 states to 8557 states and 13859 transitions. [2020-07-19 22:14:03,074 INFO L78 Accepts]: Start accepts. Automaton has 8557 states and 13859 transitions. Word has length 499 [2020-07-19 22:14:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:14:03,075 INFO L479 AbstractCegarLoop]: Abstraction has 8557 states and 13859 transitions. [2020-07-19 22:14:03,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:14:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 8557 states and 13859 transitions. [2020-07-19 22:14:03,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-19 22:14:03,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:14:03,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:14:03,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 22:14:03,093 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:14:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:14:03,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1609256108, now seen corresponding path program 1 times [2020-07-19 22:14:03,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:14:03,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885509810] [2020-07-19 22:14:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:14:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:14:04,451 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:14:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:14:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:14:04,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885509810] [2020-07-19 22:14:04,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:14:04,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:14:04,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315668794] [2020-07-19 22:14:04,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:14:04,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:14:04,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:14:04,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:14:04,735 INFO L87 Difference]: Start difference. First operand 8557 states and 13859 transitions. Second operand 4 states. [2020-07-19 22:14:24,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:14:24,571 INFO L93 Difference]: Finished difference Result 24920 states and 40248 transitions. [2020-07-19 22:14:24,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:14:24,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-19 22:14:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:14:24,612 INFO L225 Difference]: With dead ends: 24920 [2020-07-19 22:14:24,612 INFO L226 Difference]: Without dead ends: 16762 [2020-07-19 22:14:24,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:14:24,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16762 states. [2020-07-19 22:14:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16762 to 16760. [2020-07-19 22:14:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16760 states. [2020-07-19 22:14:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16760 states to 16760 states and 27017 transitions. [2020-07-19 22:14:25,269 INFO L78 Accepts]: Start accepts. Automaton has 16760 states and 27017 transitions. Word has length 500 [2020-07-19 22:14:25,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:14:25,269 INFO L479 AbstractCegarLoop]: Abstraction has 16760 states and 27017 transitions. [2020-07-19 22:14:25,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:14:25,269 INFO L276 IsEmpty]: Start isEmpty. Operand 16760 states and 27017 transitions. [2020-07-19 22:14:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-19 22:14:25,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:14:25,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:14:25,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-19 22:14:25,299 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:14:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:14:25,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1212361551, now seen corresponding path program 1 times [2020-07-19 22:14:25,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:14:25,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126315307] [2020-07-19 22:14:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:14:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:14:26,238 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:14:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:14:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:14:26,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126315307] [2020-07-19 22:14:26,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:14:26,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:14:26,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981071195] [2020-07-19 22:14:26,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:14:26,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:14:26,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:14:26,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:14:26,440 INFO L87 Difference]: Start difference. First operand 16760 states and 27017 transitions. Second operand 4 states. [2020-07-19 22:14:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:14:47,725 INFO L93 Difference]: Finished difference Result 50024 states and 80606 transitions. [2020-07-19 22:14:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:14:47,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-19 22:14:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:14:47,793 INFO L225 Difference]: With dead ends: 50024 [2020-07-19 22:14:47,794 INFO L226 Difference]: Without dead ends: 33408 [2020-07-19 22:14:47,832 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 [2020-07-19 22:14:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33408 states. [2020-07-19 22:14:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33408 to 16858. [2020-07-19 22:14:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16858 states. [2020-07-19 22:14:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16858 states to 16858 states and 27168 transitions. [2020-07-19 22:14:48,627 INFO L78 Accepts]: Start accepts. Automaton has 16858 states and 27168 transitions. Word has length 500 [2020-07-19 22:14:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:14:48,627 INFO L479 AbstractCegarLoop]: Abstraction has 16858 states and 27168 transitions. [2020-07-19 22:14:48,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:14:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 16858 states and 27168 transitions. [2020-07-19 22:14:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-19 22:14:48,653 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:14:48,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:14:48,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 22:14:48,654 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:14:48,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:14:48,654 INFO L82 PathProgramCache]: Analyzing trace with hash -481026426, now seen corresponding path program 1 times [2020-07-19 22:14:48,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:14:48,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345421892] [2020-07-19 22:14:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:14:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:14:49,620 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:14:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:14:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:14:49,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345421892] [2020-07-19 22:14:49,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:14:49,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:14:49,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46827631] [2020-07-19 22:14:49,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:14:49,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:14:49,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:14:49,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:14:49,866 INFO L87 Difference]: Start difference. First operand 16858 states and 27168 transitions. Second operand 4 states. [2020-07-19 22:15:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:15:11,961 INFO L93 Difference]: Finished difference Result 50159 states and 80787 transitions. [2020-07-19 22:15:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:15:11,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-07-19 22:15:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:15:12,030 INFO L225 Difference]: With dead ends: 50159 [2020-07-19 22:15:12,030 INFO L226 Difference]: Without dead ends: 33525 [2020-07-19 22:15:12,066 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 [2020-07-19 22:15:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33525 states. [2020-07-19 22:15:13,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33525 to 16975. [2020-07-19 22:15:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16975 states. [2020-07-19 22:15:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16975 states to 16975 states and 27314 transitions. [2020-07-19 22:15:13,906 INFO L78 Accepts]: Start accepts. Automaton has 16975 states and 27314 transitions. Word has length 501 [2020-07-19 22:15:13,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:15:13,906 INFO L479 AbstractCegarLoop]: Abstraction has 16975 states and 27314 transitions. [2020-07-19 22:15:13,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:15:13,907 INFO L276 IsEmpty]: Start isEmpty. Operand 16975 states and 27314 transitions. [2020-07-19 22:15:13,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-19 22:15:13,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:15:13,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:15:13,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-19 22:15:13,929 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:15:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:15:13,930 INFO L82 PathProgramCache]: Analyzing trace with hash 353604489, now seen corresponding path program 1 times [2020-07-19 22:15:13,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:15:13,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459213615] [2020-07-19 22:15:13,930 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:15:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:15:15,037 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:15:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:15:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:15:15,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459213615] [2020-07-19 22:15:15,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:15:15,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:15:15,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760620137] [2020-07-19 22:15:15,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:15:15,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:15:15,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:15:15,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:15:15,276 INFO L87 Difference]: Start difference. First operand 16975 states and 27314 transitions. Second operand 4 states. [2020-07-19 22:15:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:15:30,126 INFO L93 Difference]: Finished difference Result 36907 states and 58972 transitions. [2020-07-19 22:15:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:15:30,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-19 22:15:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:15:30,153 INFO L225 Difference]: With dead ends: 36907 [2020-07-19 22:15:30,153 INFO L226 Difference]: Without dead ends: 24449 [2020-07-19 22:15:30,167 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 [2020-07-19 22:15:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24449 states. [2020-07-19 22:15:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24449 to 20175. [2020-07-19 22:15:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20175 states. [2020-07-19 22:15:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20175 states to 20175 states and 32638 transitions. [2020-07-19 22:15:30,886 INFO L78 Accepts]: Start accepts. Automaton has 20175 states and 32638 transitions. Word has length 502 [2020-07-19 22:15:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:15:30,887 INFO L479 AbstractCegarLoop]: Abstraction has 20175 states and 32638 transitions. [2020-07-19 22:15:30,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:15:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 20175 states and 32638 transitions. [2020-07-19 22:15:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-19 22:15:30,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:15:30,905 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:15:30,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-19 22:15:30,905 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:15:30,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:15:30,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1516159687, now seen corresponding path program 1 times [2020-07-19 22:15:30,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:15:30,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963419825] [2020-07-19 22:15:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:15:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:15:32,286 WARN L193 SmtUtils]: Spent 985.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:15:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:15:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:15:32,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963419825] [2020-07-19 22:15:32,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:15:32,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:15:32,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303250192] [2020-07-19 22:15:32,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:15:32,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:15:32,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:15:32,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:15:32,574 INFO L87 Difference]: Start difference. First operand 20175 states and 32638 transitions. Second operand 4 states. [2020-07-19 22:15:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:15:55,113 INFO L93 Difference]: Finished difference Result 58562 states and 94581 transitions. [2020-07-19 22:15:55,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:15:55,116 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-19 22:15:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:15:55,169 INFO L225 Difference]: With dead ends: 58562 [2020-07-19 22:15:55,170 INFO L226 Difference]: Without dead ends: 39356 [2020-07-19 22:15:55,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:15:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39356 states. [2020-07-19 22:15:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39356 to 39354. [2020-07-19 22:15:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39354 states. [2020-07-19 22:15:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39354 states to 39354 states and 63395 transitions. [2020-07-19 22:15:57,051 INFO L78 Accepts]: Start accepts. Automaton has 39354 states and 63395 transitions. Word has length 502 [2020-07-19 22:15:57,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:15:57,051 INFO L479 AbstractCegarLoop]: Abstraction has 39354 states and 63395 transitions. [2020-07-19 22:15:57,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:15:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 39354 states and 63395 transitions. [2020-07-19 22:15:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-19 22:15:57,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:15:57,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:15:57,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-19 22:15:57,087 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:15:57,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:15:57,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1083405788, now seen corresponding path program 1 times [2020-07-19 22:15:57,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:15:57,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134275139] [2020-07-19 22:15:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:15:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:15:58,840 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:15:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:15:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:15:59,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134275139] [2020-07-19 22:15:59,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:15:59,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:15:59,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876250166] [2020-07-19 22:15:59,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:15:59,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:15:59,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:15:59,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:15:59,027 INFO L87 Difference]: Start difference. First operand 39354 states and 63395 transitions. Second operand 5 states. [2020-07-19 22:16:20,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:16:20,642 INFO L93 Difference]: Finished difference Result 86454 states and 139882 transitions. [2020-07-19 22:16:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 22:16:20,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 502 [2020-07-19 22:16:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:16:20,694 INFO L225 Difference]: With dead ends: 86454 [2020-07-19 22:16:20,694 INFO L226 Difference]: Without dead ends: 43810 [2020-07-19 22:16:20,734 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 [2020-07-19 22:16:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43810 states. [2020-07-19 22:16:22,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43810 to 43808. [2020-07-19 22:16:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43808 states. [2020-07-19 22:16:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43808 states to 43808 states and 70674 transitions. [2020-07-19 22:16:22,690 INFO L78 Accepts]: Start accepts. Automaton has 43808 states and 70674 transitions. Word has length 502 [2020-07-19 22:16:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:16:22,690 INFO L479 AbstractCegarLoop]: Abstraction has 43808 states and 70674 transitions. [2020-07-19 22:16:22,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 22:16:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 43808 states and 70674 transitions. [2020-07-19 22:16:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-19 22:16:22,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:16:22,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:16:22,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-19 22:16:22,731 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:16:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:16:22,731 INFO L82 PathProgramCache]: Analyzing trace with hash -39965091, now seen corresponding path program 1 times [2020-07-19 22:16:22,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:16:22,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195549322] [2020-07-19 22:16:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:16:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:16:23,832 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:16:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:16:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:16:24,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195549322] [2020-07-19 22:16:24,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:16:24,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:16:24,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110160675] [2020-07-19 22:16:24,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:16:24,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:16:24,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:16:24,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:16:24,083 INFO L87 Difference]: Start difference. First operand 43808 states and 70674 transitions. Second operand 4 states. [2020-07-19 22:16:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:16:50,411 INFO L93 Difference]: Finished difference Result 129017 states and 208125 transitions. [2020-07-19 22:16:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:16:50,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-07-19 22:16:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:16:50,503 INFO L225 Difference]: With dead ends: 129017 [2020-07-19 22:16:50,503 INFO L226 Difference]: Without dead ends: 86229 [2020-07-19 22:16:50,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:16:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86229 states. [2020-07-19 22:16:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86229 to 86227. [2020-07-19 22:16:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86227 states. [2020-07-19 22:16:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86227 states to 86227 states and 138591 transitions. [2020-07-19 22:16:53,803 INFO L78 Accepts]: Start accepts. Automaton has 86227 states and 138591 transitions. Word has length 504 [2020-07-19 22:16:53,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:16:53,803 INFO L479 AbstractCegarLoop]: Abstraction has 86227 states and 138591 transitions. [2020-07-19 22:16:53,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:16:53,803 INFO L276 IsEmpty]: Start isEmpty. Operand 86227 states and 138591 transitions. [2020-07-19 22:16:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-19 22:16:53,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:16:53,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:16:53,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-19 22:16:53,878 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:16:53,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:16:53,878 INFO L82 PathProgramCache]: Analyzing trace with hash -405833094, now seen corresponding path program 1 times [2020-07-19 22:16:53,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:16:53,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208998144] [2020-07-19 22:16:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:16:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:16:55,335 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:16:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:16:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:16:55,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208998144] [2020-07-19 22:16:55,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:16:55,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:16:55,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323904379] [2020-07-19 22:16:55,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:16:55,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:16:55,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:16:55,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:16:55,502 INFO L87 Difference]: Start difference. First operand 86227 states and 138591 transitions. Second operand 4 states. [2020-07-19 22:17:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:17:14,753 INFO L93 Difference]: Finished difference Result 181383 states and 289969 transitions. [2020-07-19 22:17:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:17:14,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-07-19 22:17:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:17:14,910 INFO L225 Difference]: With dead ends: 181383 [2020-07-19 22:17:14,910 INFO L226 Difference]: Without dead ends: 122133 [2020-07-19 22:17:14,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:17:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122133 states. [2020-07-19 22:17:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122133 to 108755. [2020-07-19 22:17:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108755 states. [2020-07-19 22:17:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108755 states to 108755 states and 175647 transitions. [2020-07-19 22:17:23,036 INFO L78 Accepts]: Start accepts. Automaton has 108755 states and 175647 transitions. Word has length 504 [2020-07-19 22:17:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:17:23,036 INFO L479 AbstractCegarLoop]: Abstraction has 108755 states and 175647 transitions. [2020-07-19 22:17:23,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:17:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 108755 states and 175647 transitions. [2020-07-19 22:17:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-19 22:17:23,096 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:17:23,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:17:23,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-19 22:17:23,096 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:17:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:17:23,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1006642470, now seen corresponding path program 1 times [2020-07-19 22:17:23,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:17:23,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427778187] [2020-07-19 22:17:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:17:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:17:24,255 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:17:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:17:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:17:24,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427778187] [2020-07-19 22:17:24,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:17:24,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:17:24,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739408605] [2020-07-19 22:17:24,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 22:17:24,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:17:24,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 22:17:24,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 22:17:24,547 INFO L87 Difference]: Start difference. First operand 108755 states and 175647 transitions. Second operand 6 states. [2020-07-19 22:17:25,438 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 405 [2020-07-19 22:17:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:17:46,072 INFO L93 Difference]: Finished difference Result 229767 states and 368601 transitions. [2020-07-19 22:17:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 22:17:46,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 505 [2020-07-19 22:17:46,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:17:46,249 INFO L225 Difference]: With dead ends: 229767 [2020-07-19 22:17:46,250 INFO L226 Difference]: Without dead ends: 145445 [2020-07-19 22:17:46,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-19 22:17:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145445 states. [2020-07-19 22:17:56,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145445 to 145443. [2020-07-19 22:17:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145443 states. [2020-07-19 22:17:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145443 states to 145443 states and 233351 transitions. [2020-07-19 22:17:56,276 INFO L78 Accepts]: Start accepts. Automaton has 145443 states and 233351 transitions. Word has length 505 [2020-07-19 22:17:56,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:17:56,276 INFO L479 AbstractCegarLoop]: Abstraction has 145443 states and 233351 transitions. [2020-07-19 22:17:56,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 22:17:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 145443 states and 233351 transitions. [2020-07-19 22:17:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-19 22:17:56,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:17:56,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:17:56,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-19 22:17:56,346 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:17:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:17:56,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1930360351, now seen corresponding path program 1 times [2020-07-19 22:17:56,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:17:56,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111130637] [2020-07-19 22:17:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:17:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:17:57,867 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:17:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:17:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:17:58,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111130637] [2020-07-19 22:17:58,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:17:58,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-19 22:17:58,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887605106] [2020-07-19 22:17:58,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 22:17:58,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:17:58,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 22:17:58,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-19 22:17:58,360 INFO L87 Difference]: Start difference. First operand 145443 states and 233351 transitions. Second operand 9 states. [2020-07-19 22:17:59,236 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 402 [2020-07-19 22:18:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:18:32,582 INFO L93 Difference]: Finished difference Result 394057 states and 630473 transitions. [2020-07-19 22:18:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 22:18:32,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 505 [2020-07-19 22:18:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:18:32,950 INFO L225 Difference]: With dead ends: 394057 [2020-07-19 22:18:32,950 INFO L226 Difference]: Without dead ends: 274199 [2020-07-19 22:18:33,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-07-19 22:18:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274199 states. [2020-07-19 22:18:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274199 to 182363. [2020-07-19 22:18:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182363 states. [2020-07-19 22:18:49,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182363 states to 182363 states and 286999 transitions. [2020-07-19 22:18:49,207 INFO L78 Accepts]: Start accepts. Automaton has 182363 states and 286999 transitions. Word has length 505 [2020-07-19 22:18:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:18:49,208 INFO L479 AbstractCegarLoop]: Abstraction has 182363 states and 286999 transitions. [2020-07-19 22:18:49,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 22:18:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 182363 states and 286999 transitions. [2020-07-19 22:18:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-19 22:18:49,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:18:49,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:18:49,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-19 22:18:49,281 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:18:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:18:49,281 INFO L82 PathProgramCache]: Analyzing trace with hash -16341642, now seen corresponding path program 1 times [2020-07-19 22:18:49,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:18:49,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777071781] [2020-07-19 22:18:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:18:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:18:50,823 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:18:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:18:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:18:51,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777071781] [2020-07-19 22:18:51,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:18:51,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:18:51,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463832614] [2020-07-19 22:18:51,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:18:51,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:18:51,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:18:51,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:18:51,070 INFO L87 Difference]: Start difference. First operand 182363 states and 286999 transitions. Second operand 5 states. [2020-07-19 22:19:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:19:33,724 INFO L93 Difference]: Finished difference Result 538494 states and 847882 transitions. [2020-07-19 22:19:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 22:19:33,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2020-07-19 22:19:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:19:34,212 INFO L225 Difference]: With dead ends: 538494 [2020-07-19 22:19:34,212 INFO L226 Difference]: Without dead ends: 357567 [2020-07-19 22:19:34,354 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 [2020-07-19 22:19:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357567 states. [2020-07-19 22:20:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357567 to 357565. [2020-07-19 22:20:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357565 states. [2020-07-19 22:20:06,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357565 states to 357565 states and 561633 transitions. [2020-07-19 22:20:06,462 INFO L78 Accepts]: Start accepts. Automaton has 357565 states and 561633 transitions. Word has length 505 [2020-07-19 22:20:06,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:20:06,462 INFO L479 AbstractCegarLoop]: Abstraction has 357565 states and 561633 transitions. [2020-07-19 22:20:06,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 22:20:06,462 INFO L276 IsEmpty]: Start isEmpty. Operand 357565 states and 561633 transitions. [2020-07-19 22:20:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-19 22:20:06,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:20:06,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:20:06,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-19 22:20:06,627 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:20:06,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:20:06,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1472156648, now seen corresponding path program 1 times [2020-07-19 22:20:06,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:20:06,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741420083] [2020-07-19 22:20:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:20:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:20:07,811 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:20:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:20:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:20:08,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741420083] [2020-07-19 22:20:08,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:20:08,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 22:20:08,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025108262] [2020-07-19 22:20:08,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 22:20:08,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:20:08,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 22:20:08,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:20:08,047 INFO L87 Difference]: Start difference. First operand 357565 states and 561633 transitions. Second operand 4 states. [2020-07-19 22:21:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:21:25,285 INFO L93 Difference]: Finished difference Result 1057198 states and 1658826 transitions. [2020-07-19 22:21:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 22:21:25,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 506 [2020-07-19 22:21:25,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:21:26,191 INFO L225 Difference]: With dead ends: 1057198 [2020-07-19 22:21:26,192 INFO L226 Difference]: Without dead ends: 704312 [2020-07-19 22:21:26,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 22:21:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704312 states. [2020-07-19 22:22:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704312 to 704310. [2020-07-19 22:22:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704310 states. [2020-07-19 22:22:37,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704310 states to 704310 states and 1102125 transitions. [2020-07-19 22:22:37,398 INFO L78 Accepts]: Start accepts. Automaton has 704310 states and 1102125 transitions. Word has length 506 [2020-07-19 22:22:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 22:22:37,398 INFO L479 AbstractCegarLoop]: Abstraction has 704310 states and 1102125 transitions. [2020-07-19 22:22:37,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 22:22:37,399 INFO L276 IsEmpty]: Start isEmpty. Operand 704310 states and 1102125 transitions. [2020-07-19 22:22:37,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-19 22:22:37,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 22:22:37,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 22:22:37,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-19 22:22:37,724 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 22:22:37,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 22:22:37,725 INFO L82 PathProgramCache]: Analyzing trace with hash -303913291, now seen corresponding path program 1 times [2020-07-19 22:22:37,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 22:22:37,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312652760] [2020-07-19 22:22:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@72de9d87 [2020-07-19 22:22:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:22:40,271 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-19 22:22:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 22:22:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 22:22:40,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312652760] [2020-07-19 22:22:40,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 22:22:40,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 22:22:40,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465607103] [2020-07-19 22:22:40,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 22:22:40,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 22:22:40,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 22:22:40,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 22:22:40,510 INFO L87 Difference]: Start difference. First operand 704310 states and 1102125 transitions. Second operand 5 states. [2020-07-19 22:24:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 22:24:13,864 INFO L93 Difference]: Finished difference Result 1501371 states and 2355621 transitions. [2020-07-19 22:24:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 22:24:13,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 506 [2020-07-19 22:24:13,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 22:24:15,036 INFO L225 Difference]: With dead ends: 1501371 [2020-07-19 22:24:15,036 INFO L226 Difference]: Without dead ends: 753507 [2020-07-19 22:24:15,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 22:24:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753507 states.