/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 NUM_VARIABLES --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_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 02:16:11,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 02:16:11,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 02:16:11,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 02:16:11,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 02:16:11,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 02:16:11,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 02:16:11,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 02:16:11,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 02:16:11,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 02:16:11,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 02:16:11,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 02:16:11,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 02:16:11,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 02:16:11,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 02:16:11,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 02:16:11,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 02:16:11,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 02:16:11,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 02:16:11,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 02:16:11,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 02:16:11,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 02:16:11,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 02:16:11,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 02:16:11,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 02:16:11,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 02:16:11,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 02:16:11,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 02:16:11,415 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 02:16:11,438 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 02:16:11,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 02:16:11,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 02:16:11,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 02:16:11,441 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 02:16:11,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 02:16:11,442 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 02:16:11,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 02:16:11,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 02:16:11,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 02:16:11,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 02:16:11,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 02:16:11,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 02:16:11,444 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 02:16:11,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 02:16:11,444 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 02:16:11,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 02:16:11,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 02:16:11,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 02:16:11,445 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 02:16:11,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 02:16:11,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 02:16:11,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 02:16:11,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 02:16:11,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 02:16:11,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 02:16:11,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 02:16:11,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 02:16:11,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 02:16:11,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES 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 02:16:11,795 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 02:16:11,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 02:16:11,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 02:16:11,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 02:16:11,813 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 02:16:11,814 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 02:16:11,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44949d71/59359c1b2767475ea4ad0f4d22f17c9a/FLAGf561ea266 [2020-07-20 02:16:12,558 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 02:16:12,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 02:16:12,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44949d71/59359c1b2767475ea4ad0f4d22f17c9a/FLAGf561ea266 [2020-07-20 02:16:12,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44949d71/59359c1b2767475ea4ad0f4d22f17c9a [2020-07-20 02:16:12,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 02:16:12,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 02:16:12,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 02:16:12,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 02:16:12,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 02:16:12,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:16:12" (1/1) ... [2020-07-20 02:16:12,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729ee2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:12, skipping insertion in model container [2020-07-20 02:16:12,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:16:12" (1/1) ... [2020-07-20 02:16:12,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 02:16:12,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 02:16:14,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:16:14,569 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 02:16:15,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 02:16:15,643 INFO L208 MainTranslator]: Completed translation [2020-07-20 02:16:15,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:15 WrapperNode [2020-07-20 02:16:15,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 02:16:15,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 02:16:15,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 02:16:15,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 02:16:15,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:15" (1/1) ... [2020-07-20 02:16:15,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:15" (1/1) ... [2020-07-20 02:16:15,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:15" (1/1) ... [2020-07-20 02:16:15,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:15" (1/1) ... [2020-07-20 02:16:15,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:15" (1/1) ... [2020-07-20 02:16:15,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:15" (1/1) ... [2020-07-20 02:16:15,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:15" (1/1) ... [2020-07-20 02:16:15,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 02:16:15,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 02:16:15,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 02:16:15,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 02:16:15,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:15" (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 02:16:16,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 02:16:16,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 02:16:16,040 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 02:16:16,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 02:16:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 02:16:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 02:16:16,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 02:16:16,041 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 02:16:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 02:16:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 02:16:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 02:16:16,043 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 02:16:16,043 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 02:16:16,043 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 02:16:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 02:16:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 02:16:16,045 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 02:16:16,045 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 02:16:16,045 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 02:16:16,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 02:16:16,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 02:16:16,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 02:16:20,688 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 02:16:20,688 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 02:16:20,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:16:20 BoogieIcfgContainer [2020-07-20 02:16:20,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 02:16:20,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 02:16:20,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 02:16:20,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 02:16:20,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:16:12" (1/3) ... [2020-07-20 02:16:20,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b35cb12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:16:20, skipping insertion in model container [2020-07-20 02:16:20,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:16:15" (2/3) ... [2020-07-20 02:16:20,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b35cb12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:16:20, skipping insertion in model container [2020-07-20 02:16:20,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:16:20" (3/3) ... [2020-07-20 02:16:20,723 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 02:16:20,737 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 02:16:20,758 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 02:16:20,775 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 02:16:20,816 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 02:16:20,816 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 02:16:20,816 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 02:16:20,816 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 02:16:20,817 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 02:16:20,817 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 02:16:20,817 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 02:16:20,817 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 02:16:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2020-07-20 02:16:20,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 02:16:20,921 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:16:20,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:16:20,923 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:16:20,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:16:20,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times [2020-07-20 02:16:20,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:16:20,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791144262] [2020-07-20 02:16:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:16:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:25,025 WARN L193 SmtUtils]: Spent 1000.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:16:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 02:16:26,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791144262] [2020-07-20 02:16:26,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:16:26,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:16:26,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931562667] [2020-07-20 02:16:26,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:16:26,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:16:26,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:16:26,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:16:26,075 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 5 states. [2020-07-20 02:16:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:16:42,403 INFO L93 Difference]: Finished difference Result 4236 states and 7632 transitions. [2020-07-20 02:16:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 02:16:42,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2020-07-20 02:16:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:16:42,452 INFO L225 Difference]: With dead ends: 4236 [2020-07-20 02:16:42,452 INFO L226 Difference]: Without dead ends: 2814 [2020-07-20 02:16:42,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:16:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2020-07-20 02:16:42,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2812. [2020-07-20 02:16:42,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2812 states. [2020-07-20 02:16:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 4639 transitions. [2020-07-20 02:16:42,710 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 4639 transitions. Word has length 487 [2020-07-20 02:16:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:16:42,718 INFO L479 AbstractCegarLoop]: Abstraction has 2812 states and 4639 transitions. [2020-07-20 02:16:42,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:16:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 4639 transitions. [2020-07-20 02:16:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 02:16:42,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:16:42,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:16:42,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 02:16:42,746 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:16:42,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:16:42,747 INFO L82 PathProgramCache]: Analyzing trace with hash 39211808, now seen corresponding path program 1 times [2020-07-20 02:16:42,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:16:42,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086139358] [2020-07-20 02:16:42,748 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:16:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:44,639 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:16:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:16:45,130 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 02:16:45,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086139358] [2020-07-20 02:16:45,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:16:45,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:16:45,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021727336] [2020-07-20 02:16:45,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:16:45,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:16:45,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:16:45,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:16:45,135 INFO L87 Difference]: Start difference. First operand 2812 states and 4639 transitions. Second operand 4 states. [2020-07-20 02:17:04,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:17:04,116 INFO L93 Difference]: Finished difference Result 8158 states and 13422 transitions. [2020-07-20 02:17:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:17:04,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-07-20 02:17:04,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:17:04,150 INFO L225 Difference]: With dead ends: 8158 [2020-07-20 02:17:04,151 INFO L226 Difference]: Without dead ends: 5560 [2020-07-20 02:17:04,158 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 02:17:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2020-07-20 02:17:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5558. [2020-07-20 02:17:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5558 states. [2020-07-20 02:17:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 9141 transitions. [2020-07-20 02:17:04,366 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 9141 transitions. Word has length 489 [2020-07-20 02:17:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:17:04,369 INFO L479 AbstractCegarLoop]: Abstraction has 5558 states and 9141 transitions. [2020-07-20 02:17:04,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:17:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 9141 transitions. [2020-07-20 02:17:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 02:17:04,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:17:04,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:17:04,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 02:17:04,392 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:17:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:17:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash -960654715, now seen corresponding path program 1 times [2020-07-20 02:17:04,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:17:04,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481641810] [2020-07-20 02:17:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:17:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:05,546 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:17:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:05,731 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 02:17:05,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481641810] [2020-07-20 02:17:05,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:17:05,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:17:05,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153432421] [2020-07-20 02:17:05,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:17:05,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:17:05,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:17:05,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:17:05,735 INFO L87 Difference]: Start difference. First operand 5558 states and 9141 transitions. Second operand 4 states. [2020-07-20 02:17:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:17:23,933 INFO L93 Difference]: Finished difference Result 16577 states and 27255 transitions. [2020-07-20 02:17:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:17:23,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-20 02:17:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:17:23,989 INFO L225 Difference]: With dead ends: 16577 [2020-07-20 02:17:23,989 INFO L226 Difference]: Without dead ends: 11071 [2020-07-20 02:17:24,002 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 02:17:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2020-07-20 02:17:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 5605. [2020-07-20 02:17:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5605 states. [2020-07-20 02:17:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 9215 transitions. [2020-07-20 02:17:24,260 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 9215 transitions. Word has length 490 [2020-07-20 02:17:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:17:24,260 INFO L479 AbstractCegarLoop]: Abstraction has 5605 states and 9215 transitions. [2020-07-20 02:17:24,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:17:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 9215 transitions. [2020-07-20 02:17:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-20 02:17:24,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:17:24,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:17:24,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 02:17:24,282 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:17:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:17:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1982115813, now seen corresponding path program 1 times [2020-07-20 02:17:24,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:17:24,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444311575] [2020-07-20 02:17:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:17:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:25,510 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:17:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:25,784 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 02:17:25,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444311575] [2020-07-20 02:17:25,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:17:25,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:17:25,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507434184] [2020-07-20 02:17:25,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:17:25,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:17:25,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:17:25,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:17:25,786 INFO L87 Difference]: Start difference. First operand 5605 states and 9215 transitions. Second operand 4 states. [2020-07-20 02:17:44,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:17:44,310 INFO L93 Difference]: Finished difference Result 16140 states and 26444 transitions. [2020-07-20 02:17:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:17:44,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-20 02:17:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:17:44,354 INFO L225 Difference]: With dead ends: 16140 [2020-07-20 02:17:44,354 INFO L226 Difference]: Without dead ends: 10934 [2020-07-20 02:17:44,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:17:44,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10934 states. [2020-07-20 02:17:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10934 to 10932. [2020-07-20 02:17:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10932 states. [2020-07-20 02:17:44,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10932 states to 10932 states and 17885 transitions. [2020-07-20 02:17:44,803 INFO L78 Accepts]: Start accepts. Automaton has 10932 states and 17885 transitions. Word has length 491 [2020-07-20 02:17:44,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:17:44,804 INFO L479 AbstractCegarLoop]: Abstraction has 10932 states and 17885 transitions. [2020-07-20 02:17:44,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:17:44,804 INFO L276 IsEmpty]: Start isEmpty. Operand 10932 states and 17885 transitions. [2020-07-20 02:17:44,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-20 02:17:44,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:17:44,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:17:44,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 02:17:44,842 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:17:44,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:17:44,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2002117056, now seen corresponding path program 1 times [2020-07-20 02:17:44,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:17:44,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553626956] [2020-07-20 02:17:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:17:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:45,791 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:17:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:17:46,000 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 02:17:46,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553626956] [2020-07-20 02:17:46,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:17:46,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:17:46,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24597009] [2020-07-20 02:17:46,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:17:46,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:17:46,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:17:46,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:17:46,002 INFO L87 Difference]: Start difference. First operand 10932 states and 17885 transitions. Second operand 4 states. [2020-07-20 02:18:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:18:05,330 INFO L93 Difference]: Finished difference Result 32540 states and 53210 transitions. [2020-07-20 02:18:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:18:05,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-20 02:18:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:18:05,375 INFO L225 Difference]: With dead ends: 32540 [2020-07-20 02:18:05,375 INFO L226 Difference]: Without dead ends: 21752 [2020-07-20 02:18:05,397 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 02:18:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21752 states. [2020-07-20 02:18:05,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21752 to 11030. [2020-07-20 02:18:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11030 states. [2020-07-20 02:18:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 18036 transitions. [2020-07-20 02:18:05,808 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 18036 transitions. Word has length 491 [2020-07-20 02:18:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:18:05,808 INFO L479 AbstractCegarLoop]: Abstraction has 11030 states and 18036 transitions. [2020-07-20 02:18:05,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:18:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 18036 transitions. [2020-07-20 02:18:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 02:18:05,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:18:05,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:18:05,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 02:18:05,830 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:18:05,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:18:05,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1954950484, now seen corresponding path program 1 times [2020-07-20 02:18:05,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:18:05,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092651686] [2020-07-20 02:18:05,832 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:18:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:06,920 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:18:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:07,131 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 02:18:07,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092651686] [2020-07-20 02:18:07,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:18:07,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:18:07,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357046688] [2020-07-20 02:18:07,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:18:07,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:18:07,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:18:07,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:18:07,137 INFO L87 Difference]: Start difference. First operand 11030 states and 18036 transitions. Second operand 4 states. [2020-07-20 02:18:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:18:27,136 INFO L93 Difference]: Finished difference Result 32675 states and 53391 transitions. [2020-07-20 02:18:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:18:27,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-20 02:18:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:18:27,195 INFO L225 Difference]: With dead ends: 32675 [2020-07-20 02:18:27,196 INFO L226 Difference]: Without dead ends: 21869 [2020-07-20 02:18:27,222 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 02:18:27,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21869 states. [2020-07-20 02:18:27,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21869 to 11147. [2020-07-20 02:18:27,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11147 states. [2020-07-20 02:18:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11147 states to 11147 states and 18182 transitions. [2020-07-20 02:18:27,811 INFO L78 Accepts]: Start accepts. Automaton has 11147 states and 18182 transitions. Word has length 492 [2020-07-20 02:18:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:18:27,811 INFO L479 AbstractCegarLoop]: Abstraction has 11147 states and 18182 transitions. [2020-07-20 02:18:27,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:18:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 11147 states and 18182 transitions. [2020-07-20 02:18:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 02:18:27,831 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:18:27,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:18:27,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 02:18:27,832 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:18:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:18:27,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1783853194, now seen corresponding path program 1 times [2020-07-20 02:18:27,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:18:27,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822729566] [2020-07-20 02:18:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:18:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:29,064 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:18:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:29,478 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 02:18:29,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822729566] [2020-07-20 02:18:29,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:18:29,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:18:29,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662230669] [2020-07-20 02:18:29,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:18:29,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:18:29,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:18:29,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:18:29,482 INFO L87 Difference]: Start difference. First operand 11147 states and 18182 transitions. Second operand 4 states. [2020-07-20 02:18:49,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:18:49,481 INFO L93 Difference]: Finished difference Result 31726 states and 51629 transitions. [2020-07-20 02:18:49,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:18:49,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-20 02:18:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:18:49,525 INFO L225 Difference]: With dead ends: 31726 [2020-07-20 02:18:49,525 INFO L226 Difference]: Without dead ends: 21548 [2020-07-20 02:18:49,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:18:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21548 states. [2020-07-20 02:18:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21548 to 21546. [2020-07-20 02:18:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21546 states. [2020-07-20 02:18:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21546 states to 21546 states and 34987 transitions. [2020-07-20 02:18:50,475 INFO L78 Accepts]: Start accepts. Automaton has 21546 states and 34987 transitions. Word has length 493 [2020-07-20 02:18:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:18:50,475 INFO L479 AbstractCegarLoop]: Abstraction has 21546 states and 34987 transitions. [2020-07-20 02:18:50,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:18:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 21546 states and 34987 transitions. [2020-07-20 02:18:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 02:18:50,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:18:50,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:18:50,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 02:18:50,501 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:18:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:18:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1122991245, now seen corresponding path program 1 times [2020-07-20 02:18:50,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:18:50,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845504534] [2020-07-20 02:18:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:18:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:52,379 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:18:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:18:52,616 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 02:18:52,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845504534] [2020-07-20 02:18:52,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:18:52,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:18:52,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079461395] [2020-07-20 02:18:52,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:18:52,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:18:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:18:52,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:18:52,621 INFO L87 Difference]: Start difference. First operand 21546 states and 34987 transitions. Second operand 5 states. [2020-07-20 02:19:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:19:09,464 INFO L93 Difference]: Finished difference Result 50854 states and 83138 transitions. [2020-07-20 02:19:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:19:09,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-07-20 02:19:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:19:09,504 INFO L225 Difference]: With dead ends: 50854 [2020-07-20 02:19:09,504 INFO L226 Difference]: Without dead ends: 26010 [2020-07-20 02:19:09,539 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 02:19:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26010 states. [2020-07-20 02:19:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26010 to 26008. [2020-07-20 02:19:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26008 states. [2020-07-20 02:19:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26008 states to 26008 states and 42390 transitions. [2020-07-20 02:19:10,504 INFO L78 Accepts]: Start accepts. Automaton has 26008 states and 42390 transitions. Word has length 493 [2020-07-20 02:19:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:19:10,504 INFO L479 AbstractCegarLoop]: Abstraction has 26008 states and 42390 transitions. [2020-07-20 02:19:10,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:19:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 26008 states and 42390 transitions. [2020-07-20 02:19:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 02:19:10,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:19:10,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:19:10,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 02:19:10,532 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:19:10,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:19:10,533 INFO L82 PathProgramCache]: Analyzing trace with hash -979225654, now seen corresponding path program 1 times [2020-07-20 02:19:10,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:19:10,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219137449] [2020-07-20 02:19:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:19:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:19:11,699 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:19:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:19:12,065 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 02:19:12,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219137449] [2020-07-20 02:19:12,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:19:12,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:19:12,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420585668] [2020-07-20 02:19:12,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:19:12,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:19:12,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:19:12,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:19:12,071 INFO L87 Difference]: Start difference. First operand 26008 states and 42390 transitions. Second operand 4 states. [2020-07-20 02:19:26,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:19:26,694 INFO L93 Difference]: Finished difference Result 46676 states and 75064 transitions. [2020-07-20 02:19:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:19:26,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-20 02:19:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:19:26,740 INFO L225 Difference]: With dead ends: 46676 [2020-07-20 02:19:26,740 INFO L226 Difference]: Without dead ends: 33210 [2020-07-20 02:19:26,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:19:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33210 states. [2020-07-20 02:19:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33210 to 29048. [2020-07-20 02:19:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29048 states. [2020-07-20 02:19:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29048 states to 29048 states and 47370 transitions. [2020-07-20 02:19:28,054 INFO L78 Accepts]: Start accepts. Automaton has 29048 states and 47370 transitions. Word has length 493 [2020-07-20 02:19:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:19:28,055 INFO L479 AbstractCegarLoop]: Abstraction has 29048 states and 47370 transitions. [2020-07-20 02:19:28,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:19:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 29048 states and 47370 transitions. [2020-07-20 02:19:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-20 02:19:28,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:19:28,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:19:28,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 02:19:28,090 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:19:28,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:19:28,091 INFO L82 PathProgramCache]: Analyzing trace with hash 175584375, now seen corresponding path program 1 times [2020-07-20 02:19:28,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:19:28,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087997312] [2020-07-20 02:19:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:19:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:19:29,273 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:19:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:19:29,885 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 02:19:29,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087997312] [2020-07-20 02:19:29,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:19:29,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:19:29,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071316866] [2020-07-20 02:19:29,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:19:29,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:19:29,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:19:29,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:19:29,887 INFO L87 Difference]: Start difference. First operand 29048 states and 47370 transitions. Second operand 4 states. [2020-07-20 02:19:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:19:52,437 INFO L93 Difference]: Finished difference Result 85137 states and 138885 transitions. [2020-07-20 02:19:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:19:52,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-07-20 02:19:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:19:52,498 INFO L225 Difference]: With dead ends: 85137 [2020-07-20 02:19:52,498 INFO L226 Difference]: Without dead ends: 57109 [2020-07-20 02:19:52,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:19:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57109 states. [2020-07-20 02:19:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57109 to 57107. [2020-07-20 02:19:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57107 states. [2020-07-20 02:19:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57107 states to 57107 states and 92799 transitions. [2020-07-20 02:19:54,907 INFO L78 Accepts]: Start accepts. Automaton has 57107 states and 92799 transitions. Word has length 495 [2020-07-20 02:19:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:19:54,907 INFO L479 AbstractCegarLoop]: Abstraction has 57107 states and 92799 transitions. [2020-07-20 02:19:54,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:19:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 57107 states and 92799 transitions. [2020-07-20 02:19:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-20 02:19:54,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:19:54,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:19:54,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 02:19:54,966 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:19:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:19:54,966 INFO L82 PathProgramCache]: Analyzing trace with hash 436421350, now seen corresponding path program 1 times [2020-07-20 02:19:54,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:19:54,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676128440] [2020-07-20 02:19:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:19:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:19:56,068 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:19:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:19:56,258 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 02:19:56,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676128440] [2020-07-20 02:19:56,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:19:56,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:19:56,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624936662] [2020-07-20 02:19:56,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:19:56,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:19:56,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:19:56,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:19:56,260 INFO L87 Difference]: Start difference. First operand 57107 states and 92799 transitions. Second operand 4 states. [2020-07-20 02:20:13,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:20:13,619 INFO L93 Difference]: Finished difference Result 104503 states and 168401 transitions. [2020-07-20 02:20:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:20:13,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-07-20 02:20:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:20:13,697 INFO L225 Difference]: With dead ends: 104503 [2020-07-20 02:20:13,697 INFO L226 Difference]: Without dead ends: 74421 [2020-07-20 02:20:13,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:20:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74421 states. [2020-07-20 02:20:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74421 to 67987. [2020-07-20 02:20:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67987 states. [2020-07-20 02:20:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67987 states to 67987 states and 110671 transitions. [2020-07-20 02:20:16,696 INFO L78 Accepts]: Start accepts. Automaton has 67987 states and 110671 transitions. Word has length 495 [2020-07-20 02:20:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:20:16,696 INFO L479 AbstractCegarLoop]: Abstraction has 67987 states and 110671 transitions. [2020-07-20 02:20:16,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:20:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 67987 states and 110671 transitions. [2020-07-20 02:20:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 02:20:16,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:20:16,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:20:16,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 02:20:16,736 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:20:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:20:16,736 INFO L82 PathProgramCache]: Analyzing trace with hash -925741270, now seen corresponding path program 1 times [2020-07-20 02:20:16,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:20:16,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743161071] [2020-07-20 02:20:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:20:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:20:17,787 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:20:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:20:17,954 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 02:20:17,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743161071] [2020-07-20 02:20:17,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:20:17,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:20:17,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542175537] [2020-07-20 02:20:17,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:20:17,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:20:17,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:20:17,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:20:17,956 INFO L87 Difference]: Start difference. First operand 67987 states and 110671 transitions. Second operand 4 states. [2020-07-20 02:20:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:20:36,184 INFO L93 Difference]: Finished difference Result 199213 states and 324043 transitions. [2020-07-20 02:20:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:20:36,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-20 02:20:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:20:36,326 INFO L225 Difference]: With dead ends: 199213 [2020-07-20 02:20:36,327 INFO L226 Difference]: Without dead ends: 133619 [2020-07-20 02:20:36,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:20:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133619 states. [2020-07-20 02:20:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133619 to 68377. [2020-07-20 02:20:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68377 states. [2020-07-20 02:20:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68377 states to 68377 states and 111247 transitions. [2020-07-20 02:20:39,736 INFO L78 Accepts]: Start accepts. Automaton has 68377 states and 111247 transitions. Word has length 496 [2020-07-20 02:20:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:20:39,736 INFO L479 AbstractCegarLoop]: Abstraction has 68377 states and 111247 transitions. [2020-07-20 02:20:39,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:20:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 68377 states and 111247 transitions. [2020-07-20 02:20:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 02:20:39,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:20:39,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:39,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 02:20:39,777 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:20:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:20:39,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1131533936, now seen corresponding path program 1 times [2020-07-20 02:20:39,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:20:39,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560828681] [2020-07-20 02:20:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:20:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:20:41,251 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:20:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:20:41,421 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 02:20:41,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560828681] [2020-07-20 02:20:41,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:20:41,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-20 02:20:41,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515460606] [2020-07-20 02:20:41,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 02:20:41,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:20:41,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 02:20:41,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-20 02:20:41,423 INFO L87 Difference]: Start difference. First operand 68377 states and 111247 transitions. Second operand 10 states. [2020-07-20 02:20:43,378 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 02:21:28,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:21:28,843 INFO L93 Difference]: Finished difference Result 332486 states and 535872 transitions. [2020-07-20 02:21:28,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 02:21:28,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 496 [2020-07-20 02:21:28,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:21:29,189 INFO L225 Difference]: With dead ends: 332486 [2020-07-20 02:21:29,189 INFO L226 Difference]: Without dead ends: 289604 [2020-07-20 02:21:29,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 02:21:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289604 states. [2020-07-20 02:21:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289604 to 189071. [2020-07-20 02:21:42,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189071 states. [2020-07-20 02:21:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189071 states to 189071 states and 301915 transitions. [2020-07-20 02:21:43,162 INFO L78 Accepts]: Start accepts. Automaton has 189071 states and 301915 transitions. Word has length 496 [2020-07-20 02:21:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:21:43,162 INFO L479 AbstractCegarLoop]: Abstraction has 189071 states and 301915 transitions. [2020-07-20 02:21:43,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 02:21:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 189071 states and 301915 transitions. [2020-07-20 02:21:43,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 02:21:43,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:21:43,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:21:43,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 02:21:43,260 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:21:43,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:21:43,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1627764272, now seen corresponding path program 1 times [2020-07-20 02:21:43,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:21:43,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358011924] [2020-07-20 02:21:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:21:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:21:45,053 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:21:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:21:45,321 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 02:21:45,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358011924] [2020-07-20 02:21:45,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:21:45,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 02:21:45,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400970595] [2020-07-20 02:21:45,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 02:21:45,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:21:45,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 02:21:45,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-20 02:21:45,323 INFO L87 Difference]: Start difference. First operand 189071 states and 301915 transitions. Second operand 9 states. [2020-07-20 02:21:46,252 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 408 [2020-07-20 02:22:14,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:22:14,310 INFO L93 Difference]: Finished difference Result 274695 states and 441151 transitions. [2020-07-20 02:22:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 02:22:14,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 496 [2020-07-20 02:22:14,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:22:14,490 INFO L225 Difference]: With dead ends: 274695 [2020-07-20 02:22:14,491 INFO L226 Difference]: Without dead ends: 147327 [2020-07-20 02:22:14,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-07-20 02:22:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147327 states. [2020-07-20 02:22:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147327 to 80321. [2020-07-20 02:22:19,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80321 states. [2020-07-20 02:22:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80321 states to 80321 states and 128615 transitions. [2020-07-20 02:22:20,079 INFO L78 Accepts]: Start accepts. Automaton has 80321 states and 128615 transitions. Word has length 496 [2020-07-20 02:22:20,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:22:20,080 INFO L479 AbstractCegarLoop]: Abstraction has 80321 states and 128615 transitions. [2020-07-20 02:22:20,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 02:22:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 80321 states and 128615 transitions. [2020-07-20 02:22:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 02:22:20,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:22:20,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:22:20,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 02:22:20,126 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:22:20,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:22:20,127 INFO L82 PathProgramCache]: Analyzing trace with hash 43078897, now seen corresponding path program 1 times [2020-07-20 02:22:20,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:22:20,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893983013] [2020-07-20 02:22:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:22:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:22:22,198 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:22:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:22:22,460 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 02:22:22,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893983013] [2020-07-20 02:22:22,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:22:22,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:22:22,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230179369] [2020-07-20 02:22:22,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:22:22,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:22:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:22:22,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:22:22,462 INFO L87 Difference]: Start difference. First operand 80321 states and 128615 transitions. Second operand 5 states. [2020-07-20 02:22:52,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:22:52,207 INFO L93 Difference]: Finished difference Result 234928 states and 376112 transitions. [2020-07-20 02:22:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:22:52,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-07-20 02:22:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:22:52,382 INFO L225 Difference]: With dead ends: 234928 [2020-07-20 02:22:52,382 INFO L226 Difference]: Without dead ends: 156163 [2020-07-20 02:22:52,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 02:22:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156163 states. [2020-07-20 02:23:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156163 to 156161. [2020-07-20 02:23:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156161 states. [2020-07-20 02:23:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156161 states to 156161 states and 249237 transitions. [2020-07-20 02:23:03,273 INFO L78 Accepts]: Start accepts. Automaton has 156161 states and 249237 transitions. Word has length 496 [2020-07-20 02:23:03,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:23:03,274 INFO L479 AbstractCegarLoop]: Abstraction has 156161 states and 249237 transitions. [2020-07-20 02:23:03,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:23:03,274 INFO L276 IsEmpty]: Start isEmpty. Operand 156161 states and 249237 transitions. [2020-07-20 02:23:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 02:23:03,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:23:03,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:23:03,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 02:23:03,362 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:23:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:23:03,365 INFO L82 PathProgramCache]: Analyzing trace with hash 775267711, now seen corresponding path program 1 times [2020-07-20 02:23:03,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:23:03,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518736108] [2020-07-20 02:23:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:23:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:23:04,913 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:23:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:23:05,056 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 02:23:05,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518736108] [2020-07-20 02:23:05,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:23:05,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:23:05,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618915033] [2020-07-20 02:23:05,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:23:05,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:23:05,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:23:05,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:23:05,059 INFO L87 Difference]: Start difference. First operand 156161 states and 249237 transitions. Second operand 5 states. [2020-07-20 02:23:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:23:37,774 INFO L93 Difference]: Finished difference Result 358147 states and 573758 transitions. [2020-07-20 02:23:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 02:23:37,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 497 [2020-07-20 02:23:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:23:37,969 INFO L225 Difference]: With dead ends: 358147 [2020-07-20 02:23:37,969 INFO L226 Difference]: Without dead ends: 181401 [2020-07-20 02:23:38,088 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 02:23:38,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181401 states. [2020-07-20 02:23:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181401 to 181399. [2020-07-20 02:23:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181399 states. [2020-07-20 02:23:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181399 states to 181399 states and 289820 transitions. [2020-07-20 02:23:54,286 INFO L78 Accepts]: Start accepts. Automaton has 181399 states and 289820 transitions. Word has length 497 [2020-07-20 02:23:54,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:23:54,286 INFO L479 AbstractCegarLoop]: Abstraction has 181399 states and 289820 transitions. [2020-07-20 02:23:54,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:23:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 181399 states and 289820 transitions. [2020-07-20 02:23:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 02:23:54,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:23:54,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:23:54,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 02:23:54,421 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:23:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:23:54,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1196309607, now seen corresponding path program 1 times [2020-07-20 02:23:54,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:23:54,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244230784] [2020-07-20 02:23:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:23:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:23:55,601 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:23:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:23:55,827 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 02:23:55,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244230784] [2020-07-20 02:23:55,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:23:55,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:23:55,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101361328] [2020-07-20 02:23:55,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:23:55,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:23:55,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:23:55,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:23:55,830 INFO L87 Difference]: Start difference. First operand 181399 states and 289820 transitions. Second operand 4 states. [2020-07-20 02:24:44,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:24:44,320 INFO L93 Difference]: Finished difference Result 525060 states and 837778 transitions. [2020-07-20 02:24:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 02:24:44,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-20 02:24:44,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:24:44,779 INFO L225 Difference]: With dead ends: 525060 [2020-07-20 02:24:44,779 INFO L226 Difference]: Without dead ends: 353508 [2020-07-20 02:24:44,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:24:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353508 states. [2020-07-20 02:25:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353508 to 353506. [2020-07-20 02:25:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353506 states. [2020-07-20 02:25:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353506 states to 353506 states and 562743 transitions. [2020-07-20 02:25:18,139 INFO L78 Accepts]: Start accepts. Automaton has 353506 states and 562743 transitions. Word has length 498 [2020-07-20 02:25:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:25:18,140 INFO L479 AbstractCegarLoop]: Abstraction has 353506 states and 562743 transitions. [2020-07-20 02:25:18,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 02:25:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand 353506 states and 562743 transitions. [2020-07-20 02:25:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 02:25:18,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:25:18,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:25:18,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 02:25:18,382 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:25:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:25:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash 532673534, now seen corresponding path program 1 times [2020-07-20 02:25:18,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:25:18,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833527263] [2020-07-20 02:25:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:25:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:25:19,905 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:25:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:25:20,058 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 02:25:20,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833527263] [2020-07-20 02:25:20,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:25:20,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 02:25:20,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214052935] [2020-07-20 02:25:20,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 02:25:20,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:25:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 02:25:20,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 02:25:20,060 INFO L87 Difference]: Start difference. First operand 353506 states and 562743 transitions. Second operand 5 states. [2020-07-20 02:27:20,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 02:27:20,856 INFO L93 Difference]: Finished difference Result 1291851 states and 2046826 transitions. [2020-07-20 02:27:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 02:27:20,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2020-07-20 02:27:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 02:27:22,235 INFO L225 Difference]: With dead ends: 1291851 [2020-07-20 02:27:22,235 INFO L226 Difference]: Without dead ends: 959785 [2020-07-20 02:27:22,528 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 02:27:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959785 states. [2020-07-20 02:28:01,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959785 to 364897. [2020-07-20 02:28:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364897 states. [2020-07-20 02:28:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364897 states to 364897 states and 581519 transitions. [2020-07-20 02:28:01,874 INFO L78 Accepts]: Start accepts. Automaton has 364897 states and 581519 transitions. Word has length 499 [2020-07-20 02:28:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 02:28:01,874 INFO L479 AbstractCegarLoop]: Abstraction has 364897 states and 581519 transitions. [2020-07-20 02:28:01,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 02:28:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 364897 states and 581519 transitions. [2020-07-20 02:28:02,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 02:28:02,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 02:28:02,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 02:28:02,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-20 02:28:02,130 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 02:28:02,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 02:28:02,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1152099056, now seen corresponding path program 1 times [2020-07-20 02:28:02,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 02:28:02,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108884436] [2020-07-20 02:28:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4461fccb [2020-07-20 02:28:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:28:03,239 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-07-20 02:28:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 02:28:04,295 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 02:28:04,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108884436] [2020-07-20 02:28:04,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 02:28:04,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 02:28:04,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309757665] [2020-07-20 02:28:04,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 02:28:04,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 02:28:04,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 02:28:04,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 02:28:04,298 INFO L87 Difference]: Start difference. First operand 364897 states and 581519 transitions. Second operand 4 states.