/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.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:25:30,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:25:30,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:25:30,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:25:30,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:25:30,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:25:30,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:25:30,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:25:30,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:25:30,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:25:30,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:25:30,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:25:30,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:25:30,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:25:30,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:25:30,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:25:30,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:25:30,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:25:30,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:25:30,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:25:30,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:25:30,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:25:30,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:25:30,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:25:30,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 06:25:30,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 06:25:30,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 06:25:30,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 06:25:30,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 06:25:30,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 06:25:30,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 06:25:30,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 06:25:30,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 06:25:30,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 06:25:30,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 06:25:30,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 06:25:30,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 06:25:30,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 06:25:30,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:25:30,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:25:30,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:25:30,717 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 [2020-07-20 06:25:30,732 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:25:30,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:25:30,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:25:30,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:25:30,734 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:25:30,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:25:30,734 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:25:30,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:25:30,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:25:30,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:25:30,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:25:30,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:25:30,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:25:30,736 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:25:30,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:25:30,736 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:25:30,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:25:30,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:25:30,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:25:30,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:25:30,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:25:30,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:25:30,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:25:30,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:25:30,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:25:30,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:25:30,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:25:30,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:25:30,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:25:30,739 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:25:31,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:25:31,036 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:25:31,040 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:25:31,042 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:25:31,042 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:25:31,043 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 06:25:31,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba4b2de8/5438a6feeed749ae95121f7aa6cf7818/FLAGa2f000e51 [2020-07-20 06:25:31,816 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:25:31,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 06:25:31,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba4b2de8/5438a6feeed749ae95121f7aa6cf7818/FLAGa2f000e51 [2020-07-20 06:25:31,906 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba4b2de8/5438a6feeed749ae95121f7aa6cf7818 [2020-07-20 06:25:31,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:25:31,919 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:25:31,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:25:31,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:25:31,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:25:31,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:25:31" (1/1) ... [2020-07-20 06:25:31,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a49fa7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:25:31, skipping insertion in model container [2020-07-20 06:25:31,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:25:31" (1/1) ... [2020-07-20 06:25:31,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:25:32,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:25:33,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:25:33,666 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:25:35,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:25:35,325 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:25:35,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:25:35 WrapperNode [2020-07-20 06:25:35,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:25:35,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:25:35,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:25:35,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:25:35,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:25:35" (1/1) ... [2020-07-20 06:25:35,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:25:35" (1/1) ... [2020-07-20 06:25:35,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:25:35" (1/1) ... [2020-07-20 06:25:35,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:25:35" (1/1) ... [2020-07-20 06:25:35,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:25:35" (1/1) ... [2020-07-20 06:25:35,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:25:35" (1/1) ... [2020-07-20 06:25:35,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:25:35" (1/1) ... [2020-07-20 06:25:35,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:25:35,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:25:35,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:25:35,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:25:35,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:25:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:25:35,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:25:35,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:25:35,624 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:25:35,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:25:35,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:25:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 06:25:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 06:25:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 06:25:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:25:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:25:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 06:25:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 06:25:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 06:25:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 06:25:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 06:25:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 06:25:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 06:25:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 06:25:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 06:25:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:25:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:25:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:25:39,657 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:25:39,657 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 06:25:39,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:25:39 BoogieIcfgContainer [2020-07-20 06:25:39,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:25:39,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:25:39,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:25:39,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:25:39,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:25:31" (1/3) ... [2020-07-20 06:25:39,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3338e842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:25:39, skipping insertion in model container [2020-07-20 06:25:39,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:25:35" (2/3) ... [2020-07-20 06:25:39,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3338e842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:25:39, skipping insertion in model container [2020-07-20 06:25:39,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:25:39" (3/3) ... [2020-07-20 06:25:39,684 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 06:25:39,696 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:25:39,708 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 06:25:39,723 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 06:25:39,758 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:25:39,758 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:25:39,758 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:25:39,758 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:25:39,758 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:25:39,759 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:25:39,759 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:25:39,759 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:25:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states. [2020-07-20 06:25:39,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-20 06:25:39,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:25:39,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:25:39,862 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:25:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:25:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash -856462850, now seen corresponding path program 1 times [2020-07-20 06:25:39,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:25:39,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925564154] [2020-07-20 06:25:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:25:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:25:43,483 WARN L193 SmtUtils]: Spent 952.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:25:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:25:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:25:44,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925564154] [2020-07-20 06:25:44,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:25:44,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:25:44,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687074753] [2020-07-20 06:25:44,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:25:44,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:25:44,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:25:44,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:25:44,158 INFO L87 Difference]: Start difference. First operand 1371 states. Second operand 5 states. [2020-07-20 06:26:01,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:26:01,882 INFO L93 Difference]: Finished difference Result 4059 states and 7350 transitions. [2020-07-20 06:26:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:26:01,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 464 [2020-07-20 06:26:01,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:26:01,921 INFO L225 Difference]: With dead ends: 4059 [2020-07-20 06:26:01,921 INFO L226 Difference]: Without dead ends: 2697 [2020-07-20 06:26:01,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:26:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2020-07-20 06:26:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2647. [2020-07-20 06:26:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2647 states. [2020-07-20 06:26:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 4347 transitions. [2020-07-20 06:26:02,160 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 4347 transitions. Word has length 464 [2020-07-20 06:26:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:26:02,162 INFO L479 AbstractCegarLoop]: Abstraction has 2647 states and 4347 transitions. [2020-07-20 06:26:02,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:26:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 4347 transitions. [2020-07-20 06:26:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-07-20 06:26:02,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:26:02,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:26:02,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:26:02,179 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:26:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:26:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1286826198, now seen corresponding path program 1 times [2020-07-20 06:26:02,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:26:02,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224502962] [2020-07-20 06:26:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:26:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:26:03,857 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:26:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:26:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:26:04,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224502962] [2020-07-20 06:26:04,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:26:04,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:26:04,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934218781] [2020-07-20 06:26:04,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:26:04,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:26:04,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:26:04,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:26:04,324 INFO L87 Difference]: Start difference. First operand 2647 states and 4347 transitions. Second operand 4 states. [2020-07-20 06:26:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:26:22,916 INFO L93 Difference]: Finished difference Result 7670 states and 12560 transitions. [2020-07-20 06:26:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:26:22,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2020-07-20 06:26:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:26:22,948 INFO L225 Difference]: With dead ends: 7670 [2020-07-20 06:26:22,948 INFO L226 Difference]: Without dead ends: 5237 [2020-07-20 06:26:22,955 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 [2020-07-20 06:26:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5237 states. [2020-07-20 06:26:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5237 to 5189. [2020-07-20 06:26:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5189 states. [2020-07-20 06:26:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 8497 transitions. [2020-07-20 06:26:23,168 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 8497 transitions. Word has length 466 [2020-07-20 06:26:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:26:23,172 INFO L479 AbstractCegarLoop]: Abstraction has 5189 states and 8497 transitions. [2020-07-20 06:26:23,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:26:23,173 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 8497 transitions. [2020-07-20 06:26:23,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-20 06:26:23,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:26:23,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:26:23,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 06:26:23,190 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:26:23,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:26:23,191 INFO L82 PathProgramCache]: Analyzing trace with hash -244647039, now seen corresponding path program 1 times [2020-07-20 06:26:23,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:26:23,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160813354] [2020-07-20 06:26:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:26:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:26:24,213 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:26:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:26:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:26:24,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160813354] [2020-07-20 06:26:24,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:26:24,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:26:24,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282028069] [2020-07-20 06:26:24,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:26:24,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:26:24,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:26:24,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:26:24,501 INFO L87 Difference]: Start difference. First operand 5189 states and 8497 transitions. Second operand 4 states. [2020-07-20 06:26:43,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:26:43,176 INFO L93 Difference]: Finished difference Result 15470 states and 25323 transitions. [2020-07-20 06:26:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:26:43,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-07-20 06:26:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:26:43,221 INFO L225 Difference]: With dead ends: 15470 [2020-07-20 06:26:43,221 INFO L226 Difference]: Without dead ends: 10333 [2020-07-20 06:26:43,232 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 [2020-07-20 06:26:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10333 states. [2020-07-20 06:26:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10333 to 5236. [2020-07-20 06:26:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5236 states. [2020-07-20 06:26:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 8571 transitions. [2020-07-20 06:26:43,477 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 8571 transitions. Word has length 467 [2020-07-20 06:26:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:26:43,478 INFO L479 AbstractCegarLoop]: Abstraction has 5236 states and 8571 transitions. [2020-07-20 06:26:43,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:26:43,478 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 8571 transitions. [2020-07-20 06:26:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-20 06:26:43,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:26:43,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:26:43,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 06:26:43,494 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:26:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:26:43,494 INFO L82 PathProgramCache]: Analyzing trace with hash 536524677, now seen corresponding path program 1 times [2020-07-20 06:26:43,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:26:43,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285362289] [2020-07-20 06:26:43,495 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:26:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:26:44,681 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:26:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:26:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:26:45,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285362289] [2020-07-20 06:26:45,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:26:45,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:26:45,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181361952] [2020-07-20 06:26:45,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:26:45,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:26:45,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:26:45,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:26:45,014 INFO L87 Difference]: Start difference. First operand 5236 states and 8571 transitions. Second operand 4 states. [2020-07-20 06:27:03,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:27:03,645 INFO L93 Difference]: Finished difference Result 15048 states and 24542 transitions. [2020-07-20 06:27:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:27:03,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-07-20 06:27:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:27:03,684 INFO L225 Difference]: With dead ends: 15048 [2020-07-20 06:27:03,684 INFO L226 Difference]: Without dead ends: 10211 [2020-07-20 06:27:03,695 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 [2020-07-20 06:27:03,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2020-07-20 06:27:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 10165. [2020-07-20 06:27:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10165 states. [2020-07-20 06:27:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10165 states to 10165 states and 16557 transitions. [2020-07-20 06:27:04,138 INFO L78 Accepts]: Start accepts. Automaton has 10165 states and 16557 transitions. Word has length 468 [2020-07-20 06:27:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:27:04,139 INFO L479 AbstractCegarLoop]: Abstraction has 10165 states and 16557 transitions. [2020-07-20 06:27:04,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:27:04,139 INFO L276 IsEmpty]: Start isEmpty. Operand 10165 states and 16557 transitions. [2020-07-20 06:27:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-20 06:27:04,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:27:04,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:27:04,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 06:27:04,163 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:27:04,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:27:04,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1157993354, now seen corresponding path program 1 times [2020-07-20 06:27:04,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:27:04,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170030859] [2020-07-20 06:27:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:27:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:27:05,082 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:27:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:27:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:27:05,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170030859] [2020-07-20 06:27:05,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:27:05,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:27:05,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593200261] [2020-07-20 06:27:05,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:27:05,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:27:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:27:05,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:27:05,287 INFO L87 Difference]: Start difference. First operand 10165 states and 16557 transitions. Second operand 4 states. [2020-07-20 06:27:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:27:24,772 INFO L93 Difference]: Finished difference Result 30239 states and 49226 transitions. [2020-07-20 06:27:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:27:24,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-07-20 06:27:24,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:27:24,814 INFO L225 Difference]: With dead ends: 30239 [2020-07-20 06:27:24,814 INFO L226 Difference]: Without dead ends: 20218 [2020-07-20 06:27:24,834 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 [2020-07-20 06:27:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20218 states. [2020-07-20 06:27:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20218 to 10263. [2020-07-20 06:27:25,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10263 states. [2020-07-20 06:27:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 16708 transitions. [2020-07-20 06:27:25,263 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 16708 transitions. Word has length 468 [2020-07-20 06:27:25,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:27:25,264 INFO L479 AbstractCegarLoop]: Abstraction has 10263 states and 16708 transitions. [2020-07-20 06:27:25,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:27:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 16708 transitions. [2020-07-20 06:27:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-20 06:27:25,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:27:25,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:27:25,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 06:27:25,289 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:27:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:27:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash 284183058, now seen corresponding path program 1 times [2020-07-20 06:27:25,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:27:25,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360770676] [2020-07-20 06:27:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:27:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:27:26,214 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:27:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:27:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:27:26,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360770676] [2020-07-20 06:27:26,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:27:26,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:27:26,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594499806] [2020-07-20 06:27:26,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:27:26,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:27:26,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:27:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:27:26,521 INFO L87 Difference]: Start difference. First operand 10263 states and 16708 transitions. Second operand 4 states. [2020-07-20 06:27:46,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:27:46,421 INFO L93 Difference]: Finished difference Result 30374 states and 49407 transitions. [2020-07-20 06:27:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:27:46,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-07-20 06:27:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:27:46,467 INFO L225 Difference]: With dead ends: 30374 [2020-07-20 06:27:46,467 INFO L226 Difference]: Without dead ends: 20335 [2020-07-20 06:27:46,487 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 [2020-07-20 06:27:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20335 states. [2020-07-20 06:27:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20335 to 10380. [2020-07-20 06:27:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10380 states. [2020-07-20 06:27:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 16854 transitions. [2020-07-20 06:27:46,994 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 16854 transitions. Word has length 469 [2020-07-20 06:27:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:27:46,994 INFO L479 AbstractCegarLoop]: Abstraction has 10380 states and 16854 transitions. [2020-07-20 06:27:46,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:27:46,995 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 16854 transitions. [2020-07-20 06:27:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-20 06:27:47,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:27:47,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:27:47,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 06:27:47,013 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:27:47,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:27:47,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2073063424, now seen corresponding path program 1 times [2020-07-20 06:27:47,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:27:47,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176168614] [2020-07-20 06:27:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:27:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:27:48,113 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:27:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:27:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:27:48,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176168614] [2020-07-20 06:27:48,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:27:48,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:27:48,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427643865] [2020-07-20 06:27:48,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:27:48,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:27:48,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:27:48,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:27:48,587 INFO L87 Difference]: Start difference. First operand 10380 states and 16854 transitions. Second operand 4 states. [2020-07-20 06:28:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:28:08,726 INFO L93 Difference]: Finished difference Result 29456 states and 47707 transitions. [2020-07-20 06:28:08,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:28:08,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-07-20 06:28:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:28:08,758 INFO L225 Difference]: With dead ends: 29456 [2020-07-20 06:28:08,758 INFO L226 Difference]: Without dead ends: 20045 [2020-07-20 06:28:08,777 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 [2020-07-20 06:28:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20045 states. [2020-07-20 06:28:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20045 to 20001. [2020-07-20 06:28:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20001 states. [2020-07-20 06:28:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 32327 transitions. [2020-07-20 06:28:09,624 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 32327 transitions. Word has length 470 [2020-07-20 06:28:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:28:09,625 INFO L479 AbstractCegarLoop]: Abstraction has 20001 states and 32327 transitions. [2020-07-20 06:28:09,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:28:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 32327 transitions. [2020-07-20 06:28:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-20 06:28:09,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:28:09,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:28:09,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 06:28:09,649 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:28:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:28:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1777003357, now seen corresponding path program 1 times [2020-07-20 06:28:09,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:28:09,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287494310] [2020-07-20 06:28:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:28:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:28:11,794 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:28:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:28:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:28:12,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287494310] [2020-07-20 06:28:12,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:28:12,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:28:12,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062438541] [2020-07-20 06:28:12,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:28:12,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:28:12,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:28:12,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:28:12,065 INFO L87 Difference]: Start difference. First operand 20001 states and 32327 transitions. Second operand 5 states. [2020-07-20 06:28:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:28:28,519 INFO L93 Difference]: Finished difference Result 47599 states and 77546 transitions. [2020-07-20 06:28:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:28:28,520 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 470 [2020-07-20 06:28:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:28:28,553 INFO L225 Difference]: With dead ends: 47599 [2020-07-20 06:28:28,554 INFO L226 Difference]: Without dead ends: 24408 [2020-07-20 06:28:28,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:28:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24408 states. [2020-07-20 06:28:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24408 to 24355. [2020-07-20 06:28:29,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24355 states. [2020-07-20 06:28:29,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24355 states to 24355 states and 39550 transitions. [2020-07-20 06:28:29,526 INFO L78 Accepts]: Start accepts. Automaton has 24355 states and 39550 transitions. Word has length 470 [2020-07-20 06:28:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:28:29,526 INFO L479 AbstractCegarLoop]: Abstraction has 24355 states and 39550 transitions. [2020-07-20 06:28:29,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:28:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand 24355 states and 39550 transitions. [2020-07-20 06:28:29,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-20 06:28:29,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:28:29,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:28:29,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 06:28:29,551 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:28:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:28:29,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1583646567, now seen corresponding path program 1 times [2020-07-20 06:28:29,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:28:29,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308217295] [2020-07-20 06:28:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:28:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:28:31,169 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:28:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:28:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:28:31,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308217295] [2020-07-20 06:28:31,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:28:31,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:28:31,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458152985] [2020-07-20 06:28:31,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:28:31,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:28:31,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:28:31,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:28:31,514 INFO L87 Difference]: Start difference. First operand 24355 states and 39550 transitions. Second operand 4 states. [2020-07-20 06:28:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:28:53,453 INFO L93 Difference]: Finished difference Result 71217 states and 115711 transitions. [2020-07-20 06:28:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:28:53,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-07-20 06:28:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:28:53,502 INFO L225 Difference]: With dead ends: 71217 [2020-07-20 06:28:53,502 INFO L226 Difference]: Without dead ends: 47882 [2020-07-20 06:28:53,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:28:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47882 states. [2020-07-20 06:28:56,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47882 to 47846. [2020-07-20 06:28:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47846 states. [2020-07-20 06:28:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47846 states to 47846 states and 77425 transitions. [2020-07-20 06:28:56,811 INFO L78 Accepts]: Start accepts. Automaton has 47846 states and 77425 transitions. Word has length 472 [2020-07-20 06:28:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:28:56,811 INFO L479 AbstractCegarLoop]: Abstraction has 47846 states and 77425 transitions. [2020-07-20 06:28:56,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:28:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 47846 states and 77425 transitions. [2020-07-20 06:28:56,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 06:28:56,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:28:56,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:28:56,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 06:28:56,859 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:28:56,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:28:56,859 INFO L82 PathProgramCache]: Analyzing trace with hash 832056112, now seen corresponding path program 1 times [2020-07-20 06:28:56,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:28:56,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479666170] [2020-07-20 06:28:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:28:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:28:57,818 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:28:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:28:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:28:57,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479666170] [2020-07-20 06:28:57,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:28:57,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:28:57,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383526996] [2020-07-20 06:28:57,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:28:57,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:28:57,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:28:57,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:28:57,944 INFO L87 Difference]: Start difference. First operand 47846 states and 77425 transitions. Second operand 4 states. [2020-07-20 06:29:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:29:13,009 INFO L93 Difference]: Finished difference Result 138790 states and 224305 transitions. [2020-07-20 06:29:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:29:13,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-20 06:29:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:29:13,105 INFO L225 Difference]: With dead ends: 138790 [2020-07-20 06:29:13,105 INFO L226 Difference]: Without dead ends: 93337 [2020-07-20 06:29:13,148 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 [2020-07-20 06:29:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93337 states. [2020-07-20 06:29:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93337 to 48236. [2020-07-20 06:29:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48236 states. [2020-07-20 06:29:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48236 states to 48236 states and 78001 transitions. [2020-07-20 06:29:15,670 INFO L78 Accepts]: Start accepts. Automaton has 48236 states and 78001 transitions. Word has length 473 [2020-07-20 06:29:15,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:29:15,670 INFO L479 AbstractCegarLoop]: Abstraction has 48236 states and 78001 transitions. [2020-07-20 06:29:15,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:29:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 48236 states and 78001 transitions. [2020-07-20 06:29:15,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-20 06:29:15,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:29:15,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:29:15,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 06:29:15,727 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:29:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:29:15,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1772484418, now seen corresponding path program 1 times [2020-07-20 06:29:15,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:29:15,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822981112] [2020-07-20 06:29:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:29:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:29:16,951 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:29:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:29:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:29:17,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822981112] [2020-07-20 06:29:17,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:29:17,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:29:17,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760467508] [2020-07-20 06:29:17,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:29:17,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:29:17,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:29:17,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:29:17,289 INFO L87 Difference]: Start difference. First operand 48236 states and 78001 transitions. Second operand 4 states. [2020-07-20 06:29:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:29:43,731 INFO L93 Difference]: Finished difference Result 140167 states and 226533 transitions. [2020-07-20 06:29:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:29:43,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2020-07-20 06:29:43,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:29:43,835 INFO L225 Difference]: With dead ends: 140167 [2020-07-20 06:29:43,836 INFO L226 Difference]: Without dead ends: 94781 [2020-07-20 06:29:43,876 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 [2020-07-20 06:29:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94781 states. [2020-07-20 06:29:47,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94781 to 94747. [2020-07-20 06:29:47,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94747 states. [2020-07-20 06:29:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94747 states to 94747 states and 152646 transitions. [2020-07-20 06:29:47,935 INFO L78 Accepts]: Start accepts. Automaton has 94747 states and 152646 transitions. Word has length 474 [2020-07-20 06:29:47,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:29:47,936 INFO L479 AbstractCegarLoop]: Abstraction has 94747 states and 152646 transitions. [2020-07-20 06:29:47,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:29:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 94747 states and 152646 transitions. [2020-07-20 06:29:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-20 06:29:48,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:29:48,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:29:48,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 06:29:48,013 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:29:48,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:29:48,014 INFO L82 PathProgramCache]: Analyzing trace with hash -869161505, now seen corresponding path program 1 times [2020-07-20 06:29:48,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:29:48,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612838273] [2020-07-20 06:29:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:29:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:29:49,588 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:29:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:29:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:29:49,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612838273] [2020-07-20 06:29:49,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:29:49,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:29:49,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065155065] [2020-07-20 06:29:49,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:29:49,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:29:49,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:29:49,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:29:49,755 INFO L87 Difference]: Start difference. First operand 94747 states and 152646 transitions. Second operand 5 states. [2020-07-20 06:30:15,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:30:15,104 INFO L93 Difference]: Finished difference Result 233316 states and 378328 transitions. [2020-07-20 06:30:15,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:30:15,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 474 [2020-07-20 06:30:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:30:15,244 INFO L225 Difference]: With dead ends: 233316 [2020-07-20 06:30:15,245 INFO L226 Difference]: Without dead ends: 120293 [2020-07-20 06:30:15,320 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 [2020-07-20 06:30:15,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120293 states. [2020-07-20 06:30:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120293 to 120214. [2020-07-20 06:30:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120214 states. [2020-07-20 06:30:22,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120214 states to 120214 states and 194430 transitions. [2020-07-20 06:30:22,583 INFO L78 Accepts]: Start accepts. Automaton has 120214 states and 194430 transitions. Word has length 474 [2020-07-20 06:30:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:30:22,583 INFO L479 AbstractCegarLoop]: Abstraction has 120214 states and 194430 transitions. [2020-07-20 06:30:22,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:30:22,583 INFO L276 IsEmpty]: Start isEmpty. Operand 120214 states and 194430 transitions. [2020-07-20 06:30:22,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 06:30:22,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:30:22,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:30:22,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 06:30:22,691 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:30:22,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:30:22,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2045453381, now seen corresponding path program 1 times [2020-07-20 06:30:22,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:30:22,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690876824] [2020-07-20 06:30:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:30:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:30:24,425 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:30:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:30:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:30:24,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690876824] [2020-07-20 06:30:24,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:30:24,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:30:24,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800551093] [2020-07-20 06:30:24,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 06:30:24,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:30:24,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 06:30:24,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:30:24,719 INFO L87 Difference]: Start difference. First operand 120214 states and 194430 transitions. Second operand 6 states. [2020-07-20 06:30:25,608 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 399 [2020-07-20 06:30:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:30:46,947 INFO L93 Difference]: Finished difference Result 206583 states and 326042 transitions. [2020-07-20 06:30:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:30:46,948 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 476 [2020-07-20 06:30:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:30:47,129 INFO L225 Difference]: With dead ends: 206583 [2020-07-20 06:30:47,129 INFO L226 Difference]: Without dead ends: 157048 [2020-07-20 06:30:47,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:30:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157048 states. [2020-07-20 06:30:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157048 to 157046. [2020-07-20 06:30:55,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157046 states. [2020-07-20 06:30:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157046 states to 157046 states and 249638 transitions. [2020-07-20 06:30:55,596 INFO L78 Accepts]: Start accepts. Automaton has 157046 states and 249638 transitions. Word has length 476 [2020-07-20 06:30:55,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:30:55,597 INFO L479 AbstractCegarLoop]: Abstraction has 157046 states and 249638 transitions. [2020-07-20 06:30:55,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 06:30:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 157046 states and 249638 transitions. [2020-07-20 06:30:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 06:30:55,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:30:55,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:30:55,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 06:30:55,736 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:30:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:30:55,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1539997558, now seen corresponding path program 1 times [2020-07-20 06:30:55,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:30:55,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226788019] [2020-07-20 06:30:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:30:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:30:57,460 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:30:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:31:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:31:00,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226788019] [2020-07-20 06:31:00,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:31:00,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-20 06:31:00,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374614163] [2020-07-20 06:31:00,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 06:31:00,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:31:00,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 06:31:00,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:31:00,329 INFO L87 Difference]: Start difference. First operand 157046 states and 249638 transitions. Second operand 14 states. [2020-07-20 06:31:01,460 WARN L193 SmtUtils]: Spent 983.00 ms on a formula simplification that was a NOOP. DAG size: 427 [2020-07-20 06:31:31,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:31:31,851 INFO L93 Difference]: Finished difference Result 234320 states and 370860 transitions. [2020-07-20 06:31:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 06:31:31,853 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 476 [2020-07-20 06:31:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:31:32,103 INFO L225 Difference]: With dead ends: 234320 [2020-07-20 06:31:32,103 INFO L226 Difference]: Without dead ends: 220089 [2020-07-20 06:31:32,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=273, Invalid=917, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 06:31:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220089 states. [2020-07-20 06:31:45,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220089 to 167302. [2020-07-20 06:31:45,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167302 states. [2020-07-20 06:31:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167302 states to 167302 states and 264406 transitions. [2020-07-20 06:31:45,906 INFO L78 Accepts]: Start accepts. Automaton has 167302 states and 264406 transitions. Word has length 476 [2020-07-20 06:31:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:31:45,907 INFO L479 AbstractCegarLoop]: Abstraction has 167302 states and 264406 transitions. [2020-07-20 06:31:45,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 06:31:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 167302 states and 264406 transitions. [2020-07-20 06:31:46,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 06:31:46,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:31:46,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:31:46,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 06:31:46,384 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:31:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:31:46,384 INFO L82 PathProgramCache]: Analyzing trace with hash -450585505, now seen corresponding path program 1 times [2020-07-20 06:31:46,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:31:46,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432865772] [2020-07-20 06:31:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:31:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:31:48,569 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:31:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:31:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:31:48,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432865772] [2020-07-20 06:31:48,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:31:48,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-20 06:31:48,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97570502] [2020-07-20 06:31:48,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 06:31:48,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:31:48,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 06:31:48,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-07-20 06:31:48,858 INFO L87 Difference]: Start difference. First operand 167302 states and 264406 transitions. Second operand 17 states. [2020-07-20 06:31:51,016 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 412 DAG size of output: 410 [2020-07-20 06:32:05,764 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-07-20 06:32:14,544 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-07-20 06:32:15,550 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-07-20 06:32:15,814 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-07-20 06:32:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:32:59,399 INFO L93 Difference]: Finished difference Result 418269 states and 651544 transitions. [2020-07-20 06:32:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-20 06:32:59,400 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-07-20 06:32:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:32:59,891 INFO L225 Difference]: With dead ends: 418269 [2020-07-20 06:32:59,891 INFO L226 Difference]: Without dead ends: 387910 [2020-07-20 06:32:59,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=843, Invalid=2349, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 06:33:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387910 states. [2020-07-20 06:33:13,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387910 to 179654. [2020-07-20 06:33:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179654 states. [2020-07-20 06:33:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179654 states to 179654 states and 282246 transitions. [2020-07-20 06:33:13,430 INFO L78 Accepts]: Start accepts. Automaton has 179654 states and 282246 transitions. Word has length 476 [2020-07-20 06:33:13,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:33:13,431 INFO L479 AbstractCegarLoop]: Abstraction has 179654 states and 282246 transitions. [2020-07-20 06:33:13,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 06:33:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 179654 states and 282246 transitions. [2020-07-20 06:33:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 06:33:13,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:33:13,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:33:13,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 06:33:13,578 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:33:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:33:13,578 INFO L82 PathProgramCache]: Analyzing trace with hash -290890227, now seen corresponding path program 1 times [2020-07-20 06:33:13,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:33:13,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775947442] [2020-07-20 06:33:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:33:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:33:18,510 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:33:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:33:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:33:18,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775947442] [2020-07-20 06:33:18,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:33:18,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-20 06:33:18,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927208750] [2020-07-20 06:33:18,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 06:33:18,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:33:18,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 06:33:18,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-07-20 06:33:18,873 INFO L87 Difference]: Start difference. First operand 179654 states and 282246 transitions. Second operand 17 states. [2020-07-20 06:33:21,212 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 425 DAG size of output: 419 [2020-07-20 06:33:44,177 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-07-20 06:33:51,442 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-07-20 06:34:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:34:19,693 INFO L93 Difference]: Finished difference Result 342787 states and 535144 transitions. [2020-07-20 06:34:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 06:34:19,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-07-20 06:34:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:34:20,041 INFO L225 Difference]: With dead ends: 342787 [2020-07-20 06:34:20,042 INFO L226 Difference]: Without dead ends: 328556 [2020-07-20 06:34:20,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=471, Invalid=1421, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 06:34:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328556 states. [2020-07-20 06:34:40,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328556 to 183718. [2020-07-20 06:34:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183718 states. [2020-07-20 06:34:40,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183718 states to 183718 states and 288054 transitions. [2020-07-20 06:34:40,504 INFO L78 Accepts]: Start accepts. Automaton has 183718 states and 288054 transitions. Word has length 476 [2020-07-20 06:34:40,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:34:40,504 INFO L479 AbstractCegarLoop]: Abstraction has 183718 states and 288054 transitions. [2020-07-20 06:34:40,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 06:34:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 183718 states and 288054 transitions. [2020-07-20 06:34:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 06:34:40,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:34:40,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:34:40,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 06:34:40,659 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:34:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:34:40,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2013494006, now seen corresponding path program 1 times [2020-07-20 06:34:40,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:34:40,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077959764] [2020-07-20 06:34:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:34:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:34:42,130 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:34:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:34:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:34:42,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077959764] [2020-07-20 06:34:42,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:34:42,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:34:42,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758177590] [2020-07-20 06:34:42,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:34:42,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:34:42,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:34:42,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:34:42,370 INFO L87 Difference]: Start difference. First operand 183718 states and 288054 transitions. Second operand 5 states. [2020-07-20 06:35:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:35:33,587 INFO L93 Difference]: Finished difference Result 536030 states and 839729 transitions. [2020-07-20 06:35:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:35:33,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-07-20 06:35:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:35:33,982 INFO L225 Difference]: With dead ends: 536030 [2020-07-20 06:35:33,982 INFO L226 Difference]: Without dead ends: 356514 [2020-07-20 06:35:34,125 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 [2020-07-20 06:35:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356514 states. [2020-07-20 06:36:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356514 to 356463. [2020-07-20 06:36:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356463 states. [2020-07-20 06:36:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356463 states to 356463 states and 556376 transitions. [2020-07-20 06:36:11,815 INFO L78 Accepts]: Start accepts. Automaton has 356463 states and 556376 transitions. Word has length 476 [2020-07-20 06:36:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:36:11,816 INFO L479 AbstractCegarLoop]: Abstraction has 356463 states and 556376 transitions. [2020-07-20 06:36:11,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:36:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 356463 states and 556376 transitions. [2020-07-20 06:36:12,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 06:36:12,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:36:12,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:36:12,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 06:36:12,193 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:36:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:36:12,194 INFO L82 PathProgramCache]: Analyzing trace with hash -596441289, now seen corresponding path program 1 times [2020-07-20 06:36:12,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:36:12,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364186756] [2020-07-20 06:36:12,194 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6fc69060 [2020-07-20 06:36:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:36:13,770 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2020-07-20 06:36:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:36:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:36:14,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364186756] [2020-07-20 06:36:14,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:36:14,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:36:14,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025978916] [2020-07-20 06:36:14,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:36:14,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:36:14,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:36:14,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:36:14,433 INFO L87 Difference]: Start difference. First operand 356463 states and 556376 transitions. Second operand 5 states. [2020-07-20 06:37:20,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:37:20,894 INFO L93 Difference]: Finished difference Result 847694 states and 1331134 transitions. [2020-07-20 06:37:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:37:20,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-07-20 06:37:20,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:37:21,467 INFO L225 Difference]: With dead ends: 847694 [2020-07-20 06:37:21,467 INFO L226 Difference]: Without dead ends: 432139 [2020-07-20 06:37:21,721 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 [2020-07-20 06:37:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432139 states.